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Find Sump pump or interior foundation drains installers in San Francisco

Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.63(
622
)

Angi Approved

In business since 1981

Warranties offered

Customers say: Super punctual

"The crew from Albert Nahman did a great job from start to finish. The project was to replace the original ductwork in our 60 year old house. Tom provided excellent advice for the estimate then Bryan’s crew did the job, 2 days, within a week of my acceptance of the proposal. Great work."
28 neighbors recently requested a quote
Recommended by88%of homeowners
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Avatar for In and Out Plumbing and Construction, Inc.
In and Out Plumbing and Construction, Inc.
4.06(
357
)

Angi Approved

In business since 1998

Free estimates

Emergency services offered

"Great experience with In & Out Plumbing. Jose was incredibly helpful and knowledgeable while providing maintenance service on our water heater—he took the time to explain everything and made sure it was running smoothly. Alec was also fantastic in helping get everything set up and coordinated. Professional, efficient, and easy to work with. Highly recommend!"
Recommended by80%of homeowners
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Avatar for DRAIN RIGHT PLUMBING & ROOTER INC
DRAIN RIGHT PLUMBING & ROOTER INC
5.00(
16
)

Angi Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"We had a backup in the kitchen sink that needed to be cleared up. Robert assessed the issue, and gave a more than fair quote. He even suggested , if need be, he'd crawl under the house and find the issue. I appreciated the obvious fact Robert wanted to make sure he left with a happy customer. He repaired and we are happy =) 5 STARS !!!!! "
Recommended by6%of homeowners
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Avatar for Amesos Plumbing Inc
Amesos Plumbing Inc
5.00(
1
)

Angi Approved

In business since 1977

Free estimates

Warranties offered

"So far so good. Snaking of kitchen sink with very old pipes. Hopefully snake did not poke pipes. Only time will tell. Keeping fingers crossed. They did a good job explaining and triple checked for leaks before they left. Of course they tried to upsell and gave us a metal trap they did not quote us upfront for. We would have chosen it over plastic, but price difference would need to be cleared upfront. That's the only negative. Otherwise, thus far we are very happy with the result. Thank you for coming on such short notice and on time! Super appreciated. 4.5-5 stars."
Recommended by100%of homeowners
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Avatar for Peter Levi Plumbing, Heating, Cooling, Drains
Peter Levi Plumbing, Heating, Cooling, Drains
3.60(
10
)

Angi Approved

In business since 1990

Free estimates

Warranties offered

"It went very well; the thorough HVAC system checkup revealed some questionable component that were best suggested to be replace with new ones. I am not confident that my HVAC system is set for more that good performance going forward. I appreciated the non-pressured advice and suggestions in coming to my decisions. Thank you, Joaquin Ortiz."
7 neighbors recently requested a quote
Recommended by70%of homeowners
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FAQs for sump pump or interior foundation drains installation projects in San Francisco, CA

Most residential pumps draw approximately 1,300 to 2,900 watts when they first start, then settle at roughly 800 to 1,050 watts during normal operation. The exact number depends on the motor’s horsepower and how often the float switch tells the pump to run. Even at the high end, the electricity cost is minor compared with the expense of cleaning up a flooded basement.

Grab a ruler and an empty 18‑inch‑wide pit. During a steady rain, time how much the water rises in one minute. Multiply that depth (in inches) by 60 to calculate gallons per hour, then add 50% for safety. If the result tops 2,100 gallons per hour—about 35 gallons a minute—you’ll need a 3/4‑horsepower unit. Anything lower, and a 1/3- or 1/2-horsepower pump should do the trick.

Loud rattling, constant cycling, or shuddering vibrations are the pump’s way of telling you it’s on its last legs. Musty smells, higher electric bills, and visible rust are other red flags. If the unit is 10 years old or older and exhibits any of these symptoms, replace it before the next heavy rain turns your basement into a wading pool.

You don’t have to hire a licensed plumber, but you should still bring in someone who installs sump pumps for a living—whether that’s a plumber, basement‑waterproofing specialist, or experienced handyman. They know the local codes, can wire the pump safely, and will test the system before they leave. Skipping professional help might void the warranty and could leave you with a pump that fails when you need it most.

Not every basement needs a pump, but if your home sits in a floodplain, has a high water table, or has ever taken on water during a storm, a sump pump is inexpensive insurance. For basements that only struggle with condensation or the occasional damp spot, sealing cracks and improving drainage may be all that is needed.

The San Francisco, CA homeowners’ guide to sump pump or interior foundation drains installations

From average costs to expert advice, get all the answers you need to get your job done.

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