Licensed & Insured · CA LIC #982663
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Pacifica, San Francisco, Burlingame, CA · Serving the Bay
PACIFICA, CA • LIC #982663 • 24/7
We answer the phone day, night, weekends, and holidays, with same-day service across the Peninsula.
Most shower problems fall into two groups: water that will not stop, and water that will not leave. Works Plumbing handles shower repair in San Mateo, CA for both, from a dripping valve to a drain that fills the tub.
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Contact Works Plumbing to schedule a shower repair. Same-day service is available, and we give you upfront pricing before we open anything.
Key Takeaways
These are the calls we get most often from San Mateo homeowners:
Some of these are a part swap. Others need diagnosis first. We tell you which before we quote.
We keep the process predictable:
We at Works Plumbing bring common valve parts and match the brand in your wall where possible. When a part is no longer made, we explain your options rather than forcing a remodel.
The valve behind the handle controls flow and temperature. When it wears, you get drips, stiff handles, or temperature swings.
What we can usually do from the front:
Most San Mateo homes get water from Cal Water’s San Mateo System, which buys its supply from the San Francisco Public Utilities Commission and treats it with chloramine. Cal Water’s 2025 report rates the average hardness as soft. We still check heads and aerators when spray is weak, rather than assume.
Weak spray and temperature swings are two of the most common shower complaints. They have different causes, so we test before we replace anything.
If only the shower has low pressure, we check the showerhead, the flow restrictor, and the valve cartridge. If the whole house has low pressure, we look upstream and check the supply side instead.
If the water turns hot or cold when someone flushes a toilet, we check the valve and its balancing parts. If you run out of hot water quickly, the shower may be fine, and the water heater may need attention instead.
We explain which part is the cause before quoting the fix.
A stain below or beside a bathroom is a sign to act quickly. The source may be the valve body, a supply connection, the drain, or the pan under the floor.
We find the source before opening anything. If a wall must be opened, we keep the opening as small as the repair allows. For hard-to-find leaks, our leak detection in San Mateo service pinpoints the spot.
If a repair turns into replacing piping or the valve body inside the wall, the City’s permit language applies. San Mateo requires plumbing permits for the installation, removal, alteration, or replacement of plumbing piping and fixtures, so we confirm permit requirements with the City before that work starts.
| Situation | What we usually recommend |
|---|---|
| Drip or stiff handle, parts available | Repair the cartridge or seals |
| Temperature swings, valve body sound | Repair or rebuild the valve |
| Parts no longer made | Discuss a valve replacement |
| Valve body cracked or leaking inside the wall | Replacement, with permit check |
| Drain slow, other fixtures fine | Clear the shower drain only |
| Drain backs up with other fixtures | Check the main line first |
Works Plumbing has been family owned and operated since 2009. We repair showers across San Mateo, including North Central, Sunnybrae, Parkside, and San Mateo Village.
See our full range of plumbing repair services, or visit our San Mateo plumbing page. If more than one drain is backing up, start with drain cleaning in San Mateo.
My shower fills with water when the toilet flushes. Is that the City’s problem?
Usually not. San Mateo property owners maintain their private sewer lateral from the building to the City main, including the wye. A shower that backs up when other fixtures run can point to that line, so we check it before working on the shower.
Will the City of San Mateo inspect my sewer lateral if my shower drain keeps clogging?
No. The City states that it does not provide sewer lateral inspections and cannot recommend service providers. We can check the line and show you what we find.
Does a shower valve repair in San Mateo need a permit?
A cartridge or seal swap at the trim is a repair to the existing valve. If the work becomes replacing piping or the valve body in the wall, San Mateo’s permit language for altering or replacing plumbing applies, and we confirm requirements with the City before we start.
Is San Mateo water hard on shower valves?
Cal Water’s 2025 report for the San Mateo System puts average hardness at 62 ppm, which the report classifies as soft. Part of the city is served by a different water district, so we check which water serves your home when scale is part of the problem.
Can you match the shower valve in my older San Mateo home?
Often, yes. Census data puts the median year built for San Mateo housing at 1965. We identify the valve brand and check parts availability before quoting, and if parts are gone, we explain the options before any wall is opened.
My shower ceiling below is stained. Who handles that in a San Mateo condo?
Start with us to find the source. Census data shows 16.7 percent of San Mateo housing units are in buildings of 50 or more units. In a shared building, we locate the leak first and help you document it for the building owner or association.
A dripping valve wastes water, and a backed-up drain can hide a bigger problem. Book shower repair in San Mateo and we will find the cause and fix it with upfront pricing.
You have to do it right for the first time in the first installation of your new shower or shower part. If a shower is not correctly mounted, the problems it creates may be more than just uncomfortable. A wrongly installed shower can leak or flood your house, causing severe water damage to neighboring areas. Furthermore, if a shower is not appropriately installed for the first time, it may be expensive to repair in the future. Trusted plumbers must install a shower to be reliable from day One to year 10. Works Plumbing has a plumbing team to equip the perfect shower to suit your needs, ensuring expert installation and minimizing the need for future plumbing repair . We Install the Following Shower Components: Stand-alone showers Whirlpool tubs Hot tubs Stand bathtub Walk-in tubs
Every job comes with upfront pricing, licensed and background-checked technicians, and a 100% satisfaction guarantee . No surprises, no pressure, ever.
Snap a photo of the problem before you call, it helps us bring the right parts on the first visit.
See how we handle it:
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Upfront pricing, licensed techs, and a real human on the phone 24/7 across the Peninsula.
A look at real Works jobs around the Peninsula.
A clogged shower trap and a blocked sewer lateral can look the same from the bathroom. Telling them apart matters in San Mateo, because the City is clear about who owns which pipe.
According to the City of San Mateo’s sewer lateral FAQ, property owners are responsible for maintaining their private sewer lateral under San Mateo Municipal Code 7.38.432. The private lateral is the pipe from the building to the City main. The City’s definition includes the wye connection at the main and any portion under the public right-of-way. The City also states that it does not provide sewer lateral inspections and cannot recommend service providers.
So when water rises in your shower, the next question is whether the blockage is in the shower’s own drain or farther downstream. Clues we look for on a San Mateo call:
If only the shower is affected, we clear the trap and drain line. If other fixtures are involved, we check the main line before touching the shower. That avoids paying for a shower repair when the real problem is the lateral, which is yours to maintain whether the City sees it or not.
We also serve these neighboring Peninsula towns.
We’ve earned our reputation one happy homeowner at a time.
“Thank you again for another job well done, and thank you for responding right away. I will continue to recommend Works Plumbing because they respond right away and get the job done efficiently.”
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Drain cleared or it’s free. Limit one per household.rnrn
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