Pressure Regulator Replacement
We gauge your house water pressure, replace failed pressure reducing valves at the main, and set them to a safe level that protects pipes and fixtures.
See the detailsShutoff valve replacement in Los Angeles for main valves and fixture stops that will not turn
A pipe is leaking and the main shutoff will not budge, or the stop valve under the sink drips every time you touch it. Old valves fail exactly when you need them, and replacing them ahead of an emergency is quick work.
- Answered 24/7
- From 746 S Broadway
- Pipes, gas & water lines
The short answer
Shutoff valve replacement swaps the main house valve and the small stop valves under sinks, behind toilets and at the water heater. Old multi-turn gate and compression stops seize with scale and corrosion. We replace them with quarter-turn ball valves that close fully in one motion, so you can stop water fast during a leak or repair.
Why gate valves and old compression stops fail
Gate valves close by lowering a metal wedge into the flow. After years left open, minerals from hard water lock the wedge or stem in place. When you finally turn the handle, the stem can shear off, or the wedge drops partway and blocks flow without sealing. Either way, the valve fails right when water is spreading across the floor.
Older multi-turn stop valves under sinks and toilets use rubber washers that harden over time. The handle may turn, but water keeps seeping past. Packing around the stem dries out too, so the first turn in years often starts a drip.
Quarter-turn ball valves avoid both problems. A drilled ball rotates ninety degrees to open or close, seals with durable seats, and is far less likely to seize from scale.
Replacing the main house shutoff
Your main shutoff is usually on the front wall near the hose bib, in the garage, or where the service line enters the house. We shut water at the meter, cut out the old valve, and install a full-port ball valve so it does not restrict flow. On galvanized lines we use transition fittings that limit corrosion between dissimilar metals.
If the house has no main shutoff at all, we add one in an easy-to-reach spot. While the water is off, we often check the pressure regulator nearby, since many LA homes have regulators that have quietly failed. Our regulator replacement can be done in the same visit.
Once the new valve is in, we open the water slowly, purge air from the house lines and check every fitting for drips before leaving.
- Full-port brass ball valve sized to the supply line
- Transition fittings where galvanized meets copper
- Lever handle labeled and easy to reach
- Optional hose bib and regulator work in the same visit
Fixture stops under sinks, toilets and appliances
Every toilet, sink, dishwasher, ice maker and washing machine should have its own stop valve so you can shut off that one fixture without killing water to the house. We replace old multi-turn stops with quarter-turn versions and fit new braided supply lines at the same time, since old rubber or plastic supply tubes burst without warning.
Doing the whole house at once saves a separate trip every time a fixture needs work. It also means that if a toilet fill valve sticks or a faucet cartridge fails, you can stop the water on the spot. Pair this with a toilet repair or faucet repair when we are already there.
The water heater should have a cold inlet shutoff as well. If it is a gate valve, we replace it, because draining or servicing a heater with a valve that will not close turns a small job into a large one.
Knowing where your valves are before the next emergency
When we finish, we show you where the main shutoff is, how to close it, and where the gas meter shutoff sits. In a quake, a burst line or a failed supply hose, those few minutes matter. Our first fifteen minutes guide lays out what to do while you wait for help.
Test your shutoffs once or twice a year by closing and reopening them. A valve that moves regularly is much less likely to seize. If any valve feels gritty or drips when turned, call us before it fails outright.
For homes with older galvanized plumbing, valve work often reveals how far the pipe corrosion has gone. If fittings crumble when we cut them, we will tell you, and repiping may be the next logical step.
Shutoff valves in Los Angeles homes and hard water
Hard water across Los Angeles is the main reason valves seize here. Calcium and magnesium deposits build up on stems and seats, especially in valves left open for years. Older homes in neighborhoods like Valley Glen and Van Nuys often still have original gate valves on galvanized lines that crumble when disturbed. In hillside homes, the main shutoff is sometimes buried in a planter or hidden behind a retaining wall, so we relocate it to an easier spot. Earthquakes are another reason to know your valves: after strong shaking, quickly shutting water can limit damage from broken lines.
Warning signs
Signs your shutoff valves need replacing
- Handle will not turnA main or stop valve frozen in place with scale is useless in an emergency, and forcing it can snap the stem.
- Water drips at the stemA drip at the packing nut when you turn the handle means the seal has hardened or worn out.
- Valve turns but water flowsGate valves often fail with the gate stuck or broken inside, so the handle spins but water keeps coming.
- Green crust around fittingsCorrosion on brass or copper connections suggests a slow leak and a fitting nearing failure.
- Round wheel-style handleMost round-handle main valves are gate valves, which are prone to seizing and failing to seal after years without use.
- No main shutoff anywhereSome older homes have no accessible house shutoff, so the only way to stop water is at the meter.
On the job
How we replace shutoff valves in your home
- STEP1
Locate and test valves
We find the main shutoff, the meter valve and every fixture stop, then test which ones close fully.
- STEP2
Shut water at the meter
If the main is being replaced, we close the meter valve or coordinate with the water department where needed.
- STEP3
Swap in ball valves
Old valves are cut out and replaced with quarter-turn ball valves and new supply lines at each fixture.
- STEP4
Restore and purge
We reopen water slowly, purge air and sediment from the lines and check every new fitting for leaks.
- STEP5
Show you the controls
We point out the main shutoff and key fixture stops so you can act fast next time.
Typical pricing
Typical shutoff valve replacement costs in LA
Price depends on valve location and access, pipe material, and how many valves are replaced in one visit.
| Job | Typical LA range |
|---|---|
| Single fixture stop valve with new supply line | $150 to $300 |
| Whole-house fixture stops, typical three-bedroom home | $700 to $1,600 |
| Main house shutoff, accessible location | $350 to $800 |
| Main shutoff where none existed, new tee and valve | $500 to $1,100 |
These are typical ranges, not a quote; corroded galvanized pipe, buried or boxed-in valves, wall access and added regulator work change the final price. See every job in our LA price guide.
Questions we hear
Shutoff Valve Replacement questions from LA customers
Where is the main water shutoff in a typical Los Angeles house?
Most often on an exterior wall facing the street, near a hose bib, or in the garage near where the line enters. In some older homes it is buried in a box near the foundation or missing entirely. If you cannot find yours, we can locate it, replace it if needed and add one if there is none.
Can I replace a shutoff valve under my sink myself?
Some homeowners do, but compression fittings on old copper can be stubborn, and an overtightened or cross-threaded valve can leak inside the cabinet for weeks before anyone notices. If the old valve is soldered or threaded onto galvanized pipe, the risk of breaking the pipe goes up. We usually replace all fixture stops in one visit.
Why should I replace a gate valve main shutoff with a ball valve?
Gate valves seize and fail to seal after years of sitting open, which is common with LA hard water. A ball valve closes with a quarter turn, seals reliably, and is far less likely to stick. In a burst pipe emergency, being able to stop the water in one motion saves floors, walls and cleanup costs.
How often should shutoff valves be replaced in an LA home?
There is no fixed schedule. Replace any valve that will not turn, drips when moved or fails to stop the water. Gate valves and old multi-turn stops from the original construction are good candidates during any other plumbing work, especially in homes that already need a new main water line.
Coverage
Where we handle shutoff valve replacement most
These are the communities that call us for this most often, with their main ZIP codes. The same 24/7 line covers every one of our 68 service areas.
- Los Angeles 90014
- Long Beach 90802
- Santa Clarita 91355
- Glendale 91205
- Pasadena 91101
- Torrance 90503
- Downey 90241
- Burbank 91502
- Reseda 91335
- Sylmar 91342
- Pacoima 91331
- Panorama City 91402
- North Hills 91343
- San Pedro 90731
- Granada Hills 91344
- Inglewood 90301
- El Monte 91731
- West Covina 91790
- Anaheim 92805
- Santa Ana 92701
- Whittier 90601
Often booked together
Related plumbing work
Whole-House Repiping
Whole-house repiping for Los Angeles homes with corroded galvanized or pinholing copper, using copper or PEX routed through attics and walls instead of the slab.
See the detailsEmergency Plumbing
Burst lines, sewage backups, failed water heaters and gas smells handled around the clock, starting with the shutoff steps you can take before we arrive.
See the detailsMain Water Line Replacement
Replacement of the private water service line between the meter and your house, in copper or approved plastic, by trenching or trenchless pull methods.
See the detailsNeed shutoff valve replacement today?
Call the line any hour. A plumber answers, asks what you are seeing and tells you what happens next.