Dibutuka dia tshina tshia mayi, dibutuka dia tshintu tshidi tshipangisha mâyi bua kupingana, ne dibutuka dia lupangu¶

Nomba ya malu a tshimpitshimpi idi mishilangane bilondeshile ditunga. Dibeji edi didi dienza mudimu ne 911, nomba wa ditunga dia États-Unis ne dia Canada. Matunga makuabu a bungi adi ne nomba wa 112, 999 anyi nomba mukuabu. Keba nomba wa ditunga dienu.

Dibutuka dia muonji munene wa mâyi a muinshi mua buloba anyi tshiamu tshia tshiamu tshia mitaku tshidi tshibutuka kudi mashika tshidi mua kuwuja nzubu wa muinshi mua buloba ne lukasa, kunyangakaja tshibumba tshia beton tshia njila, ne kukumbaja bitadi bia mâyi bia mu tshimenga bia dolare 2 000 mu dinda dimue. Bishilangane na tshiamu tshia kuela natshi mayi tshidi anu tshipueka mu minite 15 padi tshiamu tshia kuela natshi mayi tshienza mudimu muaba au, mulongo munene wa mayi ne tshiamu tshia tshiamu tshia mitaku tshidi pa mutu pa buloba tshidi tshipangisha mâyi bua kupingana panyima bidi muinshi mua bukole bua mu njila wa mu tshimenga 24/7: pa tshibidilu 345 too ne ku 690 kilopascals (5000), too ne ku 600 to 130 litres (15 to 35 gallons) ya mayi mu minite yonso** mu diba dionso nansha padi tshiamu tshia mudimu tshia tshiamu tshia nzembu tshidi pa tshimanu tshia garage tshiebe tshipatuka.

Tshidi tshibi menemene ntshia se: dinyanguka dia PVC dia muinshi mua buloba didi ne bukole bua bungi muinshi mua peluze wa kumpala anyi mu njila wa mashinyi didi disukula metre kubike a nsenga mikole ne buloba bua dilongo muinshi mua bisonsa anyi pavema wa beton, bienza muaba udi muinshi mua buloba (muaba udi muinshi mua buloba) muwule tente ne bitotshi bidi bimueneka bibi pa mutu pa tshibandilu tshia nzubu too ne pa tshibandilu ne udi udina too ne mu tshiadi mu tshina tshidi tshienda tshikuluka. Kumanya mushindu wa kutapulula tshiamu tshia kukanga natshi mayi bua nzubu yebe ya kuowa mâyi ne ya kuowa mâyi ikale yenza mudimu, mushindu wa kuenza mudimu ne tshiamu tshia metre-box curb mu bukubi, ne mushindu wa kuepuka dinyanguka dia bintu bidi bikuata bintu bidi bikuba nzubu webe ne mâyi ebe a kunua.

Enza nunku mpindieu¶

Ikala kule ne nzubu mibandile, matope adi apueka, anyi mabue a beton adibu bakose: Bikala tshitupa tshia peluze webe tshibandile bu tshipupu tshinene tshia mâyi, anyi bikala mâyi apatuka muinshi mua njila wa beton, mu njila wa mu nseke anyi mu tshimanu tshia tshishimikidi, ikala ne bana, nyama ya mu nzubu ne bantu bakole mutantshi wa metre 3 (10) panyima. Mâyi a bukole bua bungi adi anyanga tshitupa tshia muinshi mua buloba tshidi mua kukuluka diakamue ku bujitu bua muntu, ne kuenda pabuipi ne kazubu ka transformateur ka nzembu ka muinshi mua buloba anyi muendu wa mu njila mu mâyi adi mimane kudi mua kukuatshika ku nzembu.
Kujimiji dîba bua kupatula kazubu ka tshiamu tshia tshiamu tshia mitaku tshidi ku tshimanu: Bikala mayi apueka misangu yonso afumina ku tshisumbu tshia milonda ya tshiamu tshia mitaku tshidi ku luseke lua nzubu webe anyi apatuka mu kazubu ka valve wa peluze wa vert mêba 24 ku dituku, kupatula tshiamu tshia tshiamu tshia mashinyi tshidi mu garage kakuakuenza bualu nansha bumue to. Ditapuluka didi ku luseke lua luseke lua difila dia bintu bia bukole budi kabuyi bushintuluka ku mutu kua ma valve a mu tshitupa tshia nzembu; udi ne tshia kukanga tshiamu tshia kukanga natshi tshiamu.
Kudimuna tshianza tshia kuinshi tshia ball-valve pa tshiamu tshieba tshia tshiamu tshia mitaku tshidi pa mutu pa buloba tshidi tshipangisha mâyi bua kupingana kunyima mu 90 degrés: Enda ku tshiamu tshia mitaku tshia mu tshimfuanyi tshia U anyi tshia tshingoma tshidi tshiteka pa tshimanu tshia pambelu tshia nzubu webe (anyi ku mitshi ya kumpala). Kuata tshiamu tshia tshiamu tshia kuinshi pa tshiamu tshia kubuela natshi ne tshinyungulule 90 degrés (tshitupa tshia tshitupa tshinayi) bua tshianza tshikale mushindame (tshia nkuruse) ku tshiamu. Ebi bidi bipangisha mayi onso bua kuya ku tshingoma tshia panyima tshidi tshipanduluke anyi ku milonda ya mu lupangu lua mu musulu mu masekonde 3 eku ulama mayi a mu nzubu muebe.
Kanga tshiamu tshia kukanga natshi mâyi tshidi munda mua nzubu webe wa muinshi mua buloba, muaba wa tshilala benyi, anyi kazubu ka panshi: Bikala tshiamu tshia mitaku tshitshibuka muinshi mua tshianza tshia tshiamu tshia mitaku tshidi tshipangisha mâyi bua kupingana panyima (anyi tshiamu tshiebe tshidi ne tshiamu tshia kukanga natshi mâyi tshia muinshi mua buloba), keba tshiamu tshia kukanga natshi mâyi: munda mua nzubu webe wa muinshi mua buloba anyi mu nzubu wa mudimu mudi tshiamu tshia kuela natshi mâyi tshia tshiamu tshia mitaku tshikosa mâyi mulongo, anyi munda mua tshibuikidiji tshia plastique tshia 15-centimetre (6-inch) tshia vert mu lupangu lua kumpala pabuipi ne tshipiminu tshia mâyi, ne utshijime.
Kanga tshiamu tshia kubandila natshi mâyi tshia mu njila munene wewe kuyi mua kupeta tshiamu tshia kuela natshi mayi: Bikala mâyi enda apuekela ku tshishimikidi tshia nzubu webe ne kuyi mua kupeta tshiamu tshia kukanga natshi mâyi mu minite ibidi, ndaku buludiludi ku tshina tshia tshiamu tshia kubandila natshi mâyi tshia mu tshimenga ku muelelu wa njila (anyi tshiamu tshia kukanga natshi mâyi tshia mu nzubu webe munene, bilondeshile muaba udi tshiamu tshia kuela natshi mâyi tshijika) ne kukudimuna tshiamu tshinene tshia tshiamu tshia mashinyi mutangile ku dîba (anyi kukudimuna tshitekelu tshia metre 90 degrés ne tshiamu tshia kukanga natshi) bua kuimanyika mâyi diakamue.
Tangila diakamue nzubu webe wa muinshi mua buloba ne muaba wa tshilala benyi bua kumona ni tshimanu tshia tshishimikidi tshidi tshipatuka: Padi mâyi ajika, tangila bimanu bia nzubu webe wa muinshi mua buloba, mishimi ya madidishi, ne tshina tshia mayi diakamue, bu mudi binunu ne binunu bia litre ya mayi a kuela mu buloba adi ku luseke lua nzubu webe misangu ya bungi asaka mayi a hydrostatique bua kupitshila mu bipese bia tshishimikidi mu mêba makese.

Danger

Kuena ne bua kumbula mu tshina tshia mâyi tshidi ne mâyi a bungi anyi kubuela mu kazubu ka metre/valve ka muinshi mua buloba kadi kayi utangila ni mionji ya nzembu ne nyama ya muitu idi mijike to. Nzubu ya bungi ya kusombela idi ne nkamba ya 120-volt anyi 240-volt ya mu lupangu lua muinshi mua buloba, milonda ya mu tshina tshia mâyi, anyi midimu minene idi kumpala kua lupangu lupueka mu mushindu wa muomumue mayi manene. Shi mayi adi apueka pabuipi ne tshiamu tshia mashika, tshishimikidi tshia muendu wa mu njila, anyi tshitekelu tshia nzembu tshia pambelu, kulenga mayi anyi bitotshi: bikila tshibambalu tshiebe tshia nzembu anyi nomba ya tshimpitshimpi (911 mu États-Unis ne mu Canada, 112 mu matunga a ku Mputu, 999 mu Royaume-Uni) wa kumpala. Kabidi, bibombi bia metre bia muinshi mua buloba mu miaba idi ne luya lukole bidi muaba muimpe wa kusokomena bua bikunyibua bia mu lufuila bifiike, bipupu bia mvinyo, bipupu bia kapia, bipupu bia nsese, ne nyoka ya lufu; misangu yonso, kangula tshibuikidiji ne tshiamu tshia tournevis tshile anyi ne tshipese tshia tshiamu tshia mitaku ne utangile munda ne muendu kumpala kua kuela tshianza tshiebe panshi bua kukudimuna tshintu tshidi tshienza mudimu.

Mutshi wa mapangadika a tshikebelu bua dinyanguka dia tshiamu tshia kuela natshi mâyi ne dibutuka dia mâyi adi apingana panyima¶

Ingidija tshimfuanyi etshi tshia mudimu bua kumanya muaba udi mâyi apatuka ne kukanga tshiamu tshidi tshipangisha mâyi a bungi kakuyi dijimija dia mayi a mu nzubu pikalaku mushindu.

flowchart TD
    Start["Mâyi a mu lupangu adi apueka, geyser, anyi peluze udi mupuekele"] --> ElecHazard{"1. Mâyi adi apueka pabuipi ne tshiamu tshia nzembu, tshiamu tshia nzembu tshidi tshipueka, anyi tshina tshikole anyi?"}
    ElecHazard -->|"Eyowa: Njiwu ya nzembu anyi ya dikuluka"| KeepBack["Ikala 3m (10 ft) kunyima; Kuena ne bua kutua pa bipupu bia muitu to; Bikila Utility anyi 911 / 112 / 999"]
    ElecHazard -->|"Tòo: Mbimpe kusemena pabuipi ne tshijika"| LeakLocation{"2. Mâyi adi afumina penyi?"}
    LeakLocation -->|"A. Kuela mâyi a tshiamu tshia mitaku ku luseke lua nzubu (tshintu tshidi tshipangisha mâyi bua kupingana panyima)"| CheckBelowHandle{"Ditapuluka didi pa mutu anyi kuinshi kua tshianza tshia tshiamu tshia kuinshi tshia tshiamu tshia mitaku anyi?"}
    CheckBelowHandle -->|"Ditapuluka didi mu tshingoma tshia kuulu anyi ku mutu kua tshianza tshia kuinshi"| TurnBackflowHandle["Kudimuna tshianza tshia kuinshi tshia levier 90 Degrees (Mu tshitupa tshia mulonda) bua kuimanyika mayi diakamue"]
    CheckBelowHandle -->|"Dipanda didi mu Pipe MUINSHI mua tshianza tshia kuinshi"| FindIsoValve["Kanga tshiamu tshia kukanga natshi mâyi (mu nzubu wa muinshi mua buloba, muaba wa tshilala benyi anyi mu kazubu ka mu lupangu)"]
    LeakLocation -->|"B. Kupatuka mu tshisuku tshia muinshi mua buloba, mu njila wa mashinyi, anyi mu kazubu ka valve ka vert"| SingleOrMain{"Bidiku bimana paudi uteka tshiamu tshia Garage Sprinkler Timer ku OFF anyi?"}
    SingleOrMain -->|"Eyowa: Udi wimana padibu bajimije tshiamu tshia dîba"| StuckSolenoid["Tshiamu tshia nzembu tshidi tshikanga: Fina Solenoid, Sukula Diaphragme, anyi Lekela Timer Off"]
    SingleOrMain -->|"Tòo: Udi wenza mudimu 24/7 nansha mudi tshiamu tshia dîba tshipatuka"| TryBackflowFirst["Kanga tshianza tshia kuinshi tshia tshiamu tshia mitaku tshidi tshipangisha dipingana dia bintu kumpala; Bindile tusunsa 60"]
    TryBackflowFirst --> DidItStop{"Kukanga tshiamu tshia Backflow Preventer kuvuaku kuimanyika dipatuka dia mâyi muinshi mua buloba anyi?"}
    DidItStop -->|"Eyowa: Dipatuka didi kuinshi kua Backflow"| KeepHouseWater["Lekela tshianza tshia Backflow tshikanga; Nzubu wenu wa munda mua nzubu wa kuowa mâyi ne wa kuowa mâyi bidi bishala bitemesha"]
    DidItStop -->|"Tòo: Dipatuka dia mâyi didi pankatshi pa tshipiminu ne dipingana dia mâyi"| FindIsoValve
    FindIsoValve --> IsoFound{"Uvuaku mupeta ne mukanga tshiibi tshia dikuba dia mayi anyi?"}
    IsoFound -->|"Tòo: Katuena mua kupeta anyi kukuata valve to"| CurbShutoff["Kanga tshiamu tshia kupima natshi mayi a mu njila (Curb Stop) ne tshifungu tshia kupima natshi/tshiamu anyi bikila tshibambalu tshia mayi"]

Understanding your home's irrigation plumbing layout (So you don't lose indoor water)¶

When an outdoor sprinkler pipe bursts, panicked homeowners often shut off the main water valve inside their house, only to discover two things: first, their indoor toilets and showers are now completely dry, and second, the outdoor yard geyser is STILL spraying full blast.

Why does shutting off the indoor house valve often fail to stop a yard sprinkler leak? Because in warm and temperate climates (such as the Southern and Western United States, Australia, and Mediterranean Europe), the underground irrigation line is tee'd off the main water line out in the front yard right next to the street water meter, before the pipe ever enters your house. Conversely, in cold northern climates with deep winter frost lines (such as Canada, the Northern and Midwest United States, and the United Kingdom), the irrigation pipe usually branches off inside the heated basement or utility room right after the indoor water meter.

Use this regional comparison table to locate your exact irrigation shutoff valves in under 60 seconds:

Shutoff Valve Level	Cold-Climate Homes (Basement / Deep Frost Line)	Warm-Climate Homes (Slab-on-Grade / Street Meter)	Keeps Indoor House Water Running?
Valve 1: Above-Ground Brass Backflow Preventer (PVB / RPZ)	Mounted on the outside house wall 30 to 60 cm (12 to 24 in) above where the copper pipe exits the basement rim joist; has two quarter-turn ball valve handles	Mounted on two vertical copper or PVC riser pipes in the front flowerbed or side yard; has two quarter-turn ball valve handles	YES (Stops all leaks in the backflow bell and all underground lawn zone pipes downstream)
Valve 2: Dedicated Irrigation Isolation ("Stop-and-Waste") Valve	Located inside the basement, crawlspace, or mechanical closet on the copper branch line heading out to the yard; has a lever handle or round wheel with a tiny brass drain cap	Buried underground in a small round 15-cm (6-inch) green or black plastic valve box located 1 to 2 meters (3 to 6 feet) away from the street water meter or directly below the backflow risers	YES (Stops leaks anywhere in the irrigation system, including risers below the backflow preventer, while keeping indoor plumbing live)
Valve 3: Main Street Water Meter Curb Valve	Located either inside the basement at the water meter OR under a heavy cast-iron lid at the street curb / sidewalk (requires a long T-bar key)	Located inside the rectangular concrete or plastic Water Meter Box near the street curb or front sidewalk; turned 90 degrees with pliers or a T-wrench	NO (Shuts off 100% of water to both the entire yard and the entire house; use if Valves 1 and 2 cannot be found)

Step-by-step: How to shut off every type of irrigation and backflow leak¶

Scenario 1: Water is gushing from the brass bell on the side of your house (Freeze-Cracked Backflow Preventer)¶

Every modern lawn sprinkler system is legally required to have a Backflow Preventer: a heavy brass valve assembly that prevents stagnant lawn water, fertilizers, weed killers, and dog waste from being sucked backward into your family's drinking water pipes if municipal street pressure drops. The three common residential types are the Pressure Vacuum Breaker (PVB) (has a round brass dome or bell on top), the Reduced Pressure Zone (RPZ) assembly (has two inline check valves with a downward relief port in the middle), and the Double Check Valve Assembly (DCVA) (often buried in a rectangular box in the yard).

When an unexpected autumn or spring freeze hits before the sprinkler system is winterized, ice expands inside the brass body with over 200,000 kilopascals (30,000 psi) of force, either blowing out the internal plastic bonnet under the top metal bell or cracking the cast-brass side wall open. As soon as the morning sun thaws the ice plug, a fountain of water shoots out of the brass unit.

Inspect the two flat metal lever handles on the brass backflow preventer:
Every PVB and RPZ backflow preventer has two quarter-turn ball valves built directly into it: Valve #1 (the Inlet Shutoff) on the vertical input pipe coming up from the ground or wall, and Valve #2 (the Outlet Shutoff) on the pipe heading back down to the lawn.
See where the water is spraying from relative to Valve #1 (the lower inlet handle):
If water is shooting out from under the top metal bell cap, from the middle relief port, or from a crack ABOVE the lower lever handle: Grab the lower metal lever handle (Inlet Valve #1) and turn it 90 degrees clockwise so the handle stands perpendicular (forming a cross "+") to the pipe. The geyser will stop in two seconds, and your indoor house water remains completely unaffected.
If the brass body or copper pipe is cracked BELOW the lower lever handle: Turning the handle on the backflow preventer will not stop water spraying from below it. Leave that handle alone and go immediately to Scenario 2 to close the upstream Irrigation Isolation Valve.

Scenario 2: Closing the dedicated Irrigation Isolation Valve (Basement or Underground Stop-and-Waste Valve)¶

Shi mulonda mutapuluke pankatshi pa tshina tshia mayi ne tshintu tshidi tshipangisha mâyi bua kupingana, udi ne tshia kukanga tshiibi tshia ku mutu kua Irrigation Isolation Valve:

Mu nzubu udi ne tshisasa tshia muinshi mua buloba anyi muaba wa tshilala benyi:
Pueka mu nzubu wa muinshi mua buloba ne ukebe muaba udi mâyi a mu nzubu webe munene abuela kupitshila ku tshisasa tshia beton anyi ku tshimanu tshia tshishimikidi.
Londa tshiamu tshia mayi mashika too ne paudi umona 19-milimetre anyi 25-milimetre (¾-inch anyi 1-inch) tshia tshiamu tshia mitaku anyi tshia PEX tshipatuka ne tshiya too ne ku tshibandilu tshia ku luseke lua nzubu mudibu bateka tshiamu tshiebe tshia pambelu tshia kupangisha mâyi bua kupingana panyima.
Close the quarter-turn ball valve (turn handle 90 degrees crosswise) or round gate/globe valve wheel (turn clockwise until snug) on that branch pipe.
In a house without a basement (Underground Yard Isolation Valve / Stop-and-Waste Valve):
Walk to the brass backflow preventer in your yard and look at the ground directly at the base of the vertical risers, or walk a straight line between your brass backflow preventer and the street water meter box.
Look for a small round green, black, or purple plastic lid (typically 15 centimeters / 6 inches in diameter) sitting flush with the grass or mulch.
Pry the plastic lid up with a screwdriver. Look inside with a flashlight: you will see either a PVC or brass quarter-turn ball valve handle at the bottom of the tube, OR a deep square brass stem (a deep-bury Stop-and-Waste key valve) that uses a long steel T-bar key (cross-handle sprinkler key) to turn 90 degrees clockwise.

Scenario 3: How to turn off the main Street Water Meter Curb Valve (When all else fails)¶

If water is flooding your yard or driveway from a ruptured main line upstream of your backflow preventer and you cannot find a dedicated irrigation isolation valve, shut off the Main Street Water Meter Valve:

Locate the rectangular Water Meter Box: Walk out to the front edge of your lawn between the sidewalk and the street curb (or in the front planter bed) and look for a rectangular concrete, cast-iron, or heavy plastic cover labeled "WATER" or "WATER METER."
Lift the lid safely: Insert a long screwdriver or pliers into the finger hole and pry the lid open while standing back (watch for spiders, wasps, or snakes underneath the lid).
Identify the Customer Side vs. the Street Curb Stop Valve:
Inside the meter box, you will see the brass water meter in the center with a pipe entering from the street side and a pipe exiting toward your house.
Look on the House Side of the meter first: Many modern water meters have a Customer Hand Wheel or Quarter-Turn Ball Valve right on the house side of the meter that you can turn by hand.
Using the Brass Curb Stop Valve (Street Side of the meter): On the street side of the meter sits a heavy brass plug valve with a raised rectangular metal tab (wing) on top and a small round padlock hole on the side.
Slip the jaws of an adjustable wrench, slip-joint pliers, or a $12 hardware-store T-Bar Water Meter Key over that rectangular brass tab and turn it 90 degrees clockwise (¼ turn) until the rectangular tab sits crosswise (perpendicular) to the pipe and the two small padlock holes line up with each other.

Warning

What if the street curb valve is rusted stiff? Never put a 1-meter (3-foot) cheater pipe over a wrench to force a corroded municipal brass curb valve at the street meter. Snapping the brass curb stop stem off on the street side of the meter unleashes an uncontrollable high-pressure municipal main geyser that only the city water department can dig up and clamp. If the street meter valve refuses to budge with moderate hand pressure on a wrench, leave it alone and call your Municipal Water Utility's 24-Hour Emergency Dispatch Line immediately; city water crews carry specialized curb keys and will shut off a leaking meter valve at the street for free in minutes.

Yard sinkholes and undermined driveways: assessing structural collapse danger¶

When a 25-millimeter (1-inch) Schedule 40 PVC irrigation main line splits open 45 centimeters (18 inches) underground, it does not always shoot a geyser into the air. Instead, if the clay soil and thick turf roots above the pipe hold together like a rubber blanket, the pressurized water tunnels horizontally underground, liquefying the soil and flushing thousands of kilograms of sand and silt out into the street gutter or down a storm drain.

Warning signs of an active underground washout or yard sinkhole¶

The "Waterbed Lawn" Blister (Hydrostatic Turf Dome): The grass sod rises 10 to 30 centimeters (4 to 12 inches) above normal grade into a spongy, undulating dome. Do not step on it or drive a riding lawnmower over it: underneath that 5-centimeter (2-inch) layer of entangled grass roots is a 60-to-120-centimeter (2-to-4-foot) deep pit of liquid mud slurry that can trap a child or pet instantly.
Muddy Silt Fans Pouring Over the Sidewalk or Curb: Clear water bubbling out of a lawn usually indicates a shallow broken sprinkler riser near the surface. Thick brown, sandy, or clay-colored mud slurry pouring across your driveway or through expansion joints in the concrete sidewalk means the water jet is actively excavating the structural soil sub-base beneath your hardscape.
Hollow Sounding Concrete Driveway or Front Steps: Once water washes out the compacted gravel base under a concrete driveway slab or front porch steps, a 10-centimeter (4-inch) thick unreinforced concrete slab is left hanging in mid-air like a fragile bridge. Walking or driving a 2,000-kilogram (4,400-pound) SUV over an undercut driveway slab will shear the concrete in half and drop the vehicle's wheel axle into the hole.

How to secure and probe a yard washout after turning off the water¶

Wait 2 to 4 hours for standing hydrostatic water to drain before walking near the cavity: Once the water valve is closed, allow the trapped underground water dome to percolate down through the soil.
Cordon off the area and tap-test concrete edges with a long steel rod or shovel: Before walking near the washout or parking a car in the driveway, stand on solid dry ground 2 meters (6 feet) back and probe the turf and the soil under the edge of the concrete driveway using a long steel rebar rod, broom handle, or shovel handle. If the rod plunges straight down 45 centimeters (18 inches) with zero resistance or you can slide the shovel blade horizontally underneath the concrete driveway slab, keep vehicles off the driveway and have a concrete stabilization contractor fill the void after the pipe is repaired.

Single sprinkler zone stuck on vs. main line burst: how to fix a stuck electric zone valve¶

What if only one section of lawn (for example, the five sprinkler heads in the front yard) refuses to shut off and keeps spraying nonstop, even after you unplug the electronic controller timer on the garage wall?

This is not a burst main pipe: it is a Stuck-Open Electric Zone Valve ("Weeping or Jammed Diaphragm"):

Why a sprinkler zone stays stuck on when the timer is unplugged: Every underground sprinkler zone valve opens and closes using water pressure against a rubber diaphragm, controlled by a tiny electromagnetic plunger (the solenoid) on top of the valve. When a tiny grain of sand, pebble, or pipe glue flake gets wedged under the rubber diaphragm seat (or inside the tiny solenoid exhaust port), water pressure can no longer push the rubber diaphragm down to close the valve.
How to close or flush a stuck electric zone valve in 2 minutes:
Find the rectangular green plastic Valve Box in the lawn: Open the lid and find the valve that is hissing or vibrating as water rushes through it.
Step A: Try the Manual Bleed Screw and Solenoid Twist (Flushes out trapped grit): On top of the black plastic valve sits a small cylinder with two electrical wires coming out of it (the solenoid) and a tiny plastic thumb-screw (the manual bleed screw). Turn the solenoid ¼ turn counterclockwise by hand to open the internal water exhaust port for 5 seconds (flushing out any trapped grain of sand), then screw the solenoid snugly clockwise until finger-tight. Do the same with the tiny manual bleed screw.
Step B: Turn the Center Flow-Control Handle clockwise (If equipped): Many residential valves (such as Rain Bird, Hunter, and Irritrol models with a cross-shaped handle in the center of the valve top) let you shut the valve down manually by turning that center Flow Control Stem clockwise all the way down.
Step C: Clean under the rubber diaphragm: If the zone still runs, shut off your main brass backflow preventer handle for 5 minutes, unscrew the 4 to 6 screws (or the unscrewing jar-top ring) on top of the stuck plastic zone valve, lift out the black rubber diaphragm, rinse away the tiny pebble stuck underneath it, inspect the rubber for tears, and screw the top cap back on.

Protecting drinking water from cross-connection contamination¶

Whenever an underground irrigation pipe ruptures or a backflow preventer cracks, there is an immediate public health rule you must follow:

Never bypass a broken brass backflow preventer with a garden hose or straight piece of PVC pipe: Every year, well-meaning homeowners remove a freeze-cracked $200 brass backflow preventer and glue in a $3 piece of straight PVC pipe "just for a few days" to water their lawn. Doing this is both illegal under plumbing codes and potentially dangerous: if a fire hydrant opens down the street or a city water main breaks, negative siphon pressure in the street main can suck hundreds of liters of stagnant underground sprinkler water, laced with lawn pesticides, systemic herbicides, E. coli from pet feces, and roundworm parasites, directly backward into your kitchen sink faucets and neighborhood water main.
What to do if you need to restore indoor house water while waiting for a plumber to fix an irrigation pipe: If your irrigation system had no separate isolation valve and you had to shut off the main street water meter to stop an outdoor sprinkler pipe leak, any hardware store carries an $8 brass or PVC Threaded Cap or SharkBite Push-to-Connect End Cap (in 19-millimeter / ¾-inch or 25-millimeter / 1-inch size). Cut or unthread the broken outdoor irrigation pipe cleanly, push or thread the solid end cap onto the supply pipe stub, wait the required cure time if using PVC solvent cement, and turn your main house water meter back on so your family has safe indoor drinking water and flushing toilets while the yard system remains safely capped off.

Preventative checklist: winterizing a backflow preventer in 3 minutes¶

Over 90 percent of burst brass backflow preventers happen during the first unexpected overnight frost of autumn or a late spring cold snap before a full compressed-air blowout. You can drain and freeze-proof your above-ground brass backflow preventer in 3 minutes using the "45-Degree Isolation and Drain Method":

Step 1: Shut off the upstream Irrigation Isolation Valve (either inside your basement or in the small round underground stop-and-waste box in the yard). If your basement valve has a tiny brass waste cap on the side, place a bucket under it and loosen the cap to drain the vertical pipe.
Step 2: Open the two small brass Test Cocks on the side of the Backflow Preventer to a 45-degree angle: Use a flathead screwdriver to turn both tiny slotted brass spigots halfway (to a 45-degree angle) so air enters and trapped water drains from the brass chamber.
Step 3: Turn BOTH main ball-valve handles on the Backflow Preventer to a 45-degree angle (Half-Open / Half-Closed): Never leave ball valves 100 percent closed (90 degrees) or 100 percent open (0 degrees) over the winter, because a tiny pocket of water stays trapped between the chrome ball and the outer brass housing wall and splits the brass body when frozen. Leaving both handles and test cocks at 45 degrees vents the internal ball cavity to open air.
Step 4: Open an outdoor manual drain petcock or run one sprinkler zone on the timer for 60 seconds to relieve hydrostatic pressure in the riser pipes, then cover the unit with an insulated winter pouch.

Nkonko itubu bela misangu ya bungi¶

Why is water still gushing from my yard or backflow preventer even after I turned off the main water valve inside my house?¶

In most warm-climate and slab-on-grade homes, the underground lawn sprinkler supply line branches off the main municipal water line **out in the front yard right next to the street water meter**, before the pipe ever enters your house or garage. Because the irrigation tee is located upstream of your indoor house shutoff valve, closing the valve inside your house only shuts off your indoor sinks and toilets while leaving full street pressure flowing into the broken sprinkler line. To stop the leak, close either the lower quarter-turn handle on the outdoor brass backflow preventer, the dedicated underground irrigation isolation valve (under a small 15-centimeter / 6-inch round lid in the lawn near the meter), or the main street water meter curb valve.

How do I turn off a leaking brass backflow preventer on the side of my house?¶

Look at the two flat metal lever handles attached to the pipes of the brass backflow assembly. When a ball valve handle is parallel (inline) with the pipe, the water is ON. Grab the **lower lever handle (on the inlet pipe coming up from the ground or house wall)** and rotate it **90 degrees clockwise** so the handle sits **perpendicular (crosswise) to the pipe**. As long as the freeze crack is located in the top bell assembly or above that lower handle, turning the lower handle 90 degrees stops the water spray immediately while keeping all indoor household plumbing working normally.

Why did the brass bell on my sprinkler pipe suddenly start spraying water when I turned the water back on after a freeze?¶

Inside the top brass bell canopy of a Pressure Vacuum Breaker (PVB) sits a spring-loaded plastic float poppet and plastic bonnet designed to seal upward against an O-ring only when a sudden rush of full water pressure hits it. First, if the unit was not drained before a freeze, ice likely cracked the internal plastic bonnet or brass body (an easy $25 DIY bonnet replacement kit if the brass body itself is not split). Second, if you turned the water supply valve back on *too slowly*, the internal float poppet never received the strong surge of pressure needed to snap it up against the top rubber seal; try closing the upper outlet valve handle first, then opening the lower inlet valve handle **quickly and all the way** so the sudden pressure surge seats the internal poppet cleanly.

Will my homeowner's insurance or the city water utility pay for a $1,500 water bill caused by an underground sprinkler leak?¶

Ma assurance a bena nzubu kaena atamba kufuta mushinga wa mayi adi majimija anyi dilongolola dia tshina tshia mâyi tshidi muinshi mua buloba to (pa kumbusha pikala mayi mapite munda mua nzubu webe). Ino, pabuipi ne nzubu yonso ya mayi ya mu États-Unis, Canada, Grande-Bretagne, ne Australie idi ifila mukanda wa mbulamatadi wa **"Once-Every-Few-Years Leak Adjustment / Leak Forgivement Credit."** Paudi ujima tshiamu tshia kuowa natshi mâyi ne ulongolola tshintu tshidi tshinyanguke, wangate foto wa dilongolola ne utume faktire webe wa plombier (anyi bua kupingaja tshiamu tshiebe tshia mudimu bua kupingaja bintu bia mu tshilaminu PVC/backflow parts) ku biro bia difuta dia bitadi bia mudimu wa mayi; bena mudimu batu balekela 50 too ne ku 100 pa lukama ya bitadi bia mayi adi apita ne bitadi bia tshina tshia nzembu bipita pa tshipiminu tshieba tshia ku ngondo.

Bua tshinyi valve ya ball idi pa tshintu tshidi tshipangisha mâyi bua kupingana kunyima idi ne tshia kushiya mu angle wa 45-degree mu muvu wa mashika?¶

Tshiamu tshia tshiamu tshia mitaku tshidi ne tshiamu tshia chrome tshidi tshienda tshinyunguluka munda mua nzubu wa tshiamu tshia mitaku mukole. Padibu bakudimune tshianza tshijima tshikanga (90 degrés) anyi tshiunzulula tshijima (0 degrés), tshibombi tshikese tshia mâyi tshidi tshienza bu tshijengu tshidi tshishala tshikuate bikole pankatshi pa pambelu pa mupimbu wa tshiamu ne tshimanu tshikese tshia tshiamu tshia mitaku tshia mubidi wa valve. Mu mashika makole, tshibombi tshikese tshia mayi tshidi tshivulangana ne bia pa lukama 9 tshilua neje ne tshitapulula luseke lua tshiamu tshia mitaku tshiunzulula bikole. Kukudimuna bipese bionso bibidi bia ball valve ne bipese bionso bibidi bia diteta ku **45-degree angle (half-open)** bipese bidi bikuata nzubu mu lupepele bua luya luonso ludi lushala lutangalake kakuyi njiwu mu tshina tshia pipe kakuyi kutshibula tshiamu tshia mitaku.

Note

Wewe anyi muena mu dîku diebe wewe mubuele mu bitotshi bikole, mupete mputa pa tshiamu tshia mitaku anyi tshia PVC, anyi mupete mputa mu mâyi mashika paudi ukanga tshina tshia mâyi tshia mu muvu wa mashika, sukula mputa bimpe ne mâyi mimpe a kunua ne ulengeje munda diakamue. Ela meji bua kulonga mudimu wa diambuluisha dia kumpala kudi Croix-Rouge, St John Ambulance, anyi kudi mufidi wa diambuluisha wa muaba unudi bua kuikala mudiakaje bua njiwu ya njiwu ya kumbelu ne ya pambelu.

Miaba mifumina¶

Tshibambalu tshia dikuba dia buloba tshia mu États-Unis (EPA, États-Unis): Mukanda wa dilombola dia disangisha dia bintu: Bisumbu bia dikuba dia mâyi adi apingana (PVB, RPZ, DCVA) ne dikuba dia bintu bia kunua.
Tshisumbu tshia bena mudimu ba mayi tshia mu Amerike (AWWA, États-Unis & Canada): AWWA M14 Dikuba dia dipingana dia mâyi ne dilama dia mayi adi apitakana ne mikenji ya dilama dia mayi mu nzubu.
Tshisumbu tshia bena mudimu ba malu a mayi ne a biamu (IAPMO) ne bena mudimu ba pa buloba bujima (ICC): Mukenji wa malu a mayi (UPC) ne mukenji wa malu a mayi a pa buloba bujima (IPC) tshitupa tshia 608 (Dikuba dia mayi a kunua ne diteka dia tshintu tshidi tshipangisha dibuela dia mâyi mu madimi).
Tshisumbu tshia Irrigation Association (IA, United States) & UK Water Regulations Advisory Scheme (WRAS, United Kingdom): Dilengeja dia nzubu ya mayi mu muvu wa mashika, Dikuba dia dinyanguka dia mashika, ne Mikenji ya dikanga dia njila munene mu tshimpitshimpi.
Tshikebelu tshia malu a buloba tshia mu États-Unis (USGS, États-Unis): Mashika adi bantu benze ne dinyanguka dia milonda ya muinshi mua buloba didi difumina ku dinyanguka dia njila wa mâyi.