In short
The original valves in many Rosemead homes are multi-turn stops that crust up and drip once someone turns them. We shut the house water, swap them for quarter-turn valves sized to the pipe, connect fresh braided supply hoses, and check each one for weeping.
Your photo checklist
- Each stop you want changed, close up
- Where the pipe comes through the wall
- The house main valve
- Mineral crust or drips on the stem
- The hose running up to the fixture
Covered on a Rosemead visit
- Angle stops under kitchen and bathroom sinks replaced
- Toilet shutoffs swapped with a new braided supply line
- Multi-turn valves upgraded to quarter-turn ball valves
- Weeping valve stems repacked when the body is sound
- Washer and laundry valves replaced like-for-like
- Every valve closed and reopened to prove it works
Outside what we take on
- Gas piping of any kind past the existing flex connector.
- Roof, foundation and structural repairs.
- Tearing out and rebuilding a whole bathroom or kitchen.
Old valves in Rosemead homes
With a median build year of 1959, many Rosemead houses still have multi-turn compression or sweat valves that have not been closed in years. Scale builds up around the stem, and the washer inside hardens, so the handle won’t budge or the valve won’t fully stop the flow.
The EPA’s WaterSense program lists “other leaking valves” alongside worn flappers and dripping faucets as common household leaks, and says the average home’s leaks waste more than 9,300 gallons a year. A shutoff that weeps at the stem is one of them, and it usually drips into a closed cabinet where no one sees it.
How a valve swap goes
Shut the house water
We close the main and drain the line at a low faucet.
Remove the old valve
Compression valves come off the pipe; sweated valves are cut or unsoldered cleanly.
Fit the new valve
A quarter-turn valve goes on with a new ferrule or fitting matched to the pipe, then a braided supply line to the fixture.
Test under pressure
Water back on, valve opened and closed several times, every joint checked dry.
Bigger jobs, free estimate
Replacing the main house valve on buried pipe or re-piping galvanized lines is a bigger plumbing job with its own free estimate; the meter itself belongs to the water utility. We replace fixture shutoffs and accessible valves inside the house.
While we’re out for this, Rosemead customers often add outdoor faucet repair, under-sink leak repair, faucet repair and replacement, toilet repair, burst pipe repair or pressure regulator and expansion tank replacement.
What to text
Photos of each valve you want replaced, and let us know whether your main shutoff works.
Shutoff valve questions
Why is my shutoff valve still letting water through?
The washer or seat inside is worn, or scale keeps it from closing. Replacing it with a quarter-turn valve stops the drip so you can work on the fixture.
How much does it cost to replace a shutoff valve under a sink?
It depends on the pipe type and how many valves you want done. Doing several together saves time. A photo of the valve and pipe lets us quote it.
Should I test my shutoff valves?
Yes, a gentle turn once in a while keeps them from seizing. If one leaks after turning, call us.
Why quarter-turn?
A ball valve closes fully with a quarter turn and is less prone to seizing than a multi-turn washer valve.
Can you replace a valve without shutting off the whole house?
No. The main has to be off while the old valve is removed.
My main shutoff doesn’t work. What then?
Your water provider may need to shut it at the meter. We replace fixture valves once the water is off.
Do you replace supply lines too?
Yes, with braided lines sized to the fixture.
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What about galvanized pipe?
We can put a new valve on sound galvanized pipe. Corroded pipe is a bigger repair with its own free estimate.
How long does it take?
Depends on the job; we’ll let you know after we see photos.
Can a stem leak be fixed without replacing?
Sometimes, by tightening or repacking the stem nut. Old valves usually get replaced.
Do you do washing machine valves?
Yes, like-for-like or as a single-lever box valve where one exists.
Will the water look rusty afterward?
Briefly, in older pipes. Run the cold tap until it clears.
Should I replace all the valves at once?
Often, yes. If several are the same age, doing them together means one house shutoff instead of several, and every fixture gets a valve you can trust.
Where is my main shutoff?
In many Rosemead houses it sits where the line comes up near the front hose bib. We can show you during the visit.
Can you replace the shut-off valve under my sink?
Yes. We turn off the main, remove the old valve, fit a quarter-turn valve sized to your pipe, and connect new supply lines.
Do you replace washing machine shut-off valves?
Yes. Old washer valves often seize or leak. We replace them with new valves and suggest braided hoses.
Jobs that pair with this one
- Faucet repairFaucets.
- Toilet repairToilets.
- Under-sink leak repairLeaks.
- Ice maker water lineFridge lines.
Related guide: Shutoff valve replacement tips from our guide to under sink leaks and supply lines.
Just outside Rosemead? We take these jobs in Alhambra (hose bib and shutoff valve replacement in Alhambra) and San Gabriel (shutoff valve replacement in San Gabriel) as well.
Plumbing tips for Rosemead homes
- Tracking down a leak under the sinkLeak under your kitchen or bathroom sink? Find out if it’s the supply line, shutoff, faucet or drain, and text a photo for a free estimate in Rosemead.
- A toilet that runs, hisses or refills on its ownWhy toilets in Rosemead's postwar homes run, hiss or refill on their own, the quick dye test to find the cause, and what a flapper or fill valve repair involves.
Jobs like this one are everyday work for our Rosemead handyman service, from the blocks off Garvey Avenue to the streets near Rosemead Park. A photo by text gets you a quote first.
Part of plumbing repairs. You can also browse all our services or read about repairs in postwar Rosemead homes.