Sump Pump Repair in Austin & San Antonio

Sump Pumps for the Low Spot in Your Home

Below-grade garages, crawl spaces, sunken patios and basement baths on Hill Country slopes all need a pump that works the night it rains. Licensed plumbers install and repair them across Austin, San Antonio and Central Texas.

Not Every Home, but the Ones That Do

Where Sump Pumps Earn Their Keep in Central Texas

Basements are rare here, so most Central Texas homes will never need a sump pump. The ones that do need it badly. A garage cut into a Hill Country slope, a walk-out lower level, a crawl space that collects runoff, a sunken courtyard or window well, an elevator pit, or a bathroom plumbed below the level of the sewer line: in each case, water or waste has to be lifted to get out, and gravity is not going to do it. When the region gets one of its flash-flood downpours, that pump is the only thing between the rain and your floor.

Radiant’s licensed plumbers assess whether you actually need a pump, and we will say so if you do not. Where you do, we size it for the volume of water it has to move and the height it has to lift, set the pit and check valve so it does not short-cycle, route the discharge away from the foundation, and add a battery backup when losing the pump during a storm-related outage would mean losing the room. For below-grade bathrooms and laundry rooms we install sewage ejector pumps, which are a different animal from a sump pump and are sealed and vented accordingly.

Every install and repair is priced in writing before we begin, and it is covered by the Home Comfort Guarantee. If you are not sure what you have in that pit in the garage, we will come look.

  • Sized for your pit Flow rate and lift height decide the pump, not whatever is on the shelf. Undersized pumps burn out; oversized ones short-cycle.
  • Backup when the power fails Battery backup systems for pumps that have to run during the same storm that knocks the power out.
  • Home Comfort Guarantee If we cannot resolve the problem, you receive a 10% inconvenience refund, up to $1,000.
Radiant plumber arriving at a home with a Radiant box truck for a sump pump inspection

What to Watch For

Signs Your Sump Pump Is About to Let You Down

A pump that fails does it silently, usually in the middle of the storm you bought it for. These are the warnings.

  • Runs constantly or cycles every minute

    A stuck float, a failed check valve letting water fall back into the pit, or a pump too small for the inflow. All of them wear the motor out fast.

  • Grinding, rattling or a loud hum

    Debris in the impeller or a bearing on its way out. A hum with no pumping means the impeller is jammed or the motor has seized.

  • Water in the pit that never goes down

    The float is not triggering, the pump has failed or the discharge line is blocked or frozen. Test it now, not during the next storm.

  • Damp floors or a musty smell in the low room

    The pump is running but not keeping up, or water is finding a path around the pit. Either way, the room is losing.

  • Trips the breaker or the outlet

    A motor drawing too much current, a water-damaged cord or a short. Do not keep resetting it; that is a pump telling you it is done.

  • You cannot remember the last time it was tested

    Pumps sit idle for months here, and idle pumps seize. A quick bucket test tells you whether it will run when it counts.

What We Handle

Sump Pumps, Ejector Pumps and Backup Systems

Assessment, installation, repair and the maintenance that keeps a pump ready for the storm.

Radiant Plumbing & Air Conditioning van on a residential street during a sump pump installation
Sump pump, ejector pump and backup system installation and repair.
  • Do-you-need-one assessment Looking at grading, drainage and where water actually collects before recommending a pump, or telling you a French drain is the better fix.
  • Sump pump installation Submersible or pedestal pumps in a properly sized pit, with a check valve, sealed lid and a discharge line routed well away from the slab.
  • Sewage ejector pumps Sealed, vented ejector systems for bathrooms, laundry rooms and kitchens plumbed below the sewer line.
  • Battery backup systems A second pump on its own battery that takes over when the power drops or the primary pump fails.
  • Repair and replacement Floats, switches, check valves and impellers replaced when the motor is sound; a new pump when it is not.

How It Works

From the First Call to a Dry Floor

Honest assessment first. Not every wet garage needs a pump, and we will tell you which kind yours is.

  1. Tell us what is getting wet

    Where the water shows up, when, and whether there is already a pump. We book a visit, or dispatch now if it is flooding.

  2. We assess the water and the pit

    Inflow, lift height, discharge route and power. On an existing pump, a full function test of float, check valve and motor.

  3. You approve a written plan and price

    Repair, new pump, ejector system or backup, each priced. The quote is honored for 72 hours.

  4. We install and test with real water

    The pit is filled, the pump cycles, the backup is tripped, and the discharge is watched at the outlet before we leave.

Storm Coming and Not Sure the Pump Will Run?

A licensed plumber can test it, fix it or replace it before the rain, with a written price first.

What Our Customers Say

Don't just take our word for it — hear from our satisfied customers

J Jeff Fazio
Jeff Fazio 3 years ago
★★★★★
I had Radiant Plumbing replace my tankless water heater, damaged in the Feb. 2021 snowmageddon storm with a new unit. The process was smooth and professional from start to finish. The plumber, James, was extremely knowledgeable and thoroughly explained my options to me. The cost and time to perform the installation were just as estimated. When he was done, James explained how to maintain the system, what service would be needed and how to perform it, and answered all of my engineering geek questions. It was a thoroughly positive experience. I have used several different plumbers in Austin over the past 15 yrs, but my search is over - I will not hesitate to call Radiant next time and would recommend them unreservedly.

8/9/23 Update: I have subsequently used Radiant for a toilet repair, faucet installation (Danny), and drain work (Ezekiel) and they have continued to impress with knowledgeable, friendly plumbers and quality work.
C Cathy McClaugherty
Cathy McClaugherty 5 years ago
★★★★★
We called Radiant Plumbing after we noticed a water leak in our kitchen. We were in a time crunch and they were able to schedule us quickly, before we left for vacation. They sent their representative, Preston Nichols, and he was excellent to deal with! He was on time, skillful, friendly, and very professional. It turned out to be a problem with our dishwasher but Preston was quick to diagnose it and set our minds at ease. While he was here, we mentioned that our one year-old water heater needed to be flushed. Preston was quick to take care of that, as well, saving us time and money in the process. Radiant charged us almost half the price another plumber quoted us for that service! While Radiant Plumbing isn’t our usual plumber, they gained a new customer. We won’t hesitate to call Radiant again in the future based on our VERY positive experience with them.
S Stefano Rosellini
Stefano Rosellini 6 years ago
★★★★★
Had 3 different systems installed by them approx. 3 years ago for a total of approx $20k. I was quite happy with the install until the year later when they came for a maintenance call and started finding deficiencies in their own install. they wanted extra money to address those deficiencies. Now I am in the process of selling my home and an inspector has found a few items that need to be addressed and they will not even look at the report unless I schedule a $139.00 service call. Very poor customer service.. This company does not stand by their work and would not recommend.

I am revising my review of this business from 1 to 5 stars. After my original review I was contacted by the company's service manager and he made sure that I was taken care off. I had a team of 3 technicians coming to my house to double check the system and make the necessary adjustments. I was very satisfied by their attention to details and professionalism.

Maintenance Membership

Join the Care Club

Home maintenance for $9.99 a month.

Care Club members get two HVAC tune-ups and a plumbing safety inspection every year, priority scheduling, no dispatch fees — ever — and 5% off every repair.

  • Priority scheduling
  • Seasonal HVAC tune-ups
  • Annual safety inspection
  • Exclusive member discounts
  • Free dispatch on repairs
  • No long-term contracts

Sump Pump Questions

Do homes in Austin and San Antonio actually need sump pumps?

Most do not. Central Texas homes are overwhelmingly built on slabs with no basement, and rainwater is handled by grading and surface drainage. A sump pump becomes necessary when part of the home sits below the surrounding grade or below the sewer line: a garage or lower level cut into a Hill Country hillside, a crawl space that takes runoff, a sunken patio or window well, an elevator pit, or a bathroom in a below-grade addition. Our region also gets intense, fast rain events, so when a low spot does exist, it can fill quickly. If you are not sure, we would rather come look at how water moves around your home than sell you a pump you do not need.

How do I test whether my sump pump still works?

Pour water into the pit, enough to raise the float. The pump should start, the water should drop quickly, and the pump should shut off on its own. Then watch for a minute: if water rises back into the pit right away with no new inflow, the check valve is letting the discharge line drain backward. Listen for grinding or a hum without pumping, and check that the discharge outlet outside is actually releasing water. Do this a couple of times a year, and always before a forecast of heavy rain. If the pump does not start, do not assume the outlet is dead and plug something else in to check; call us, because a pump that has seized can trip a breaker or worse.

Is a battery backup worth it?

If losing the pump would mean losing the room, yes. Sump pumps are needed most during severe weather, and severe weather is when the power goes out. A battery backup is a second pump in the same pit, on its own float, powered by a battery that charges from the wall. When the primary pump loses power or fails outright, the backup takes over for hours. It is also insurance against the more common failure, a primary pump that simply dies with the power on. For a finished lower level, a garage full of stored belongings or a below-grade bathroom, the backup usually costs far less than one flood would. For a pit that rarely sees water, we will tell you it is optional.

What is the difference between a sump pump and a sewage ejector pump?

A sump pump moves clean groundwater and rainwater out of a pit and discharges it outside, away from the foundation. A sewage ejector pump moves wastewater, including solids, from fixtures that sit below the level of the main sewer line, and pumps it up into the sewer. That means a bathroom, laundry room or kitchen in a lower level or a below-grade addition. Ejector systems use a sealed, vented basin and a pump built to pass solids, and they are installed and permitted differently from a sump. Using a sump pump for sewage, or the other way around, ends badly. When you call about a pump in the floor, we will identify which one you have and service it accordingly.

Why does my sump pump run every few minutes even when it is not raining?

The usual answer is a failed check valve. Each time the pump shuts off, the water still in the discharge pipe falls back into the pit, the float rises, and the pump starts again. A new check valve fixes it. Other causes are a float switch set too low or hung up on the pit wall, a pit that is too small for the inflow, or a genuine steady source of water such as a high water table after a wet spell, a leaking supply line nearby or irrigation runoff draining toward the pit. Short cycling wears out a pump quickly, so it is worth a visit. If the pit is filling from a leak rather than groundwater, we can trace that too.

*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
(833) 656-4056 Book Now
×