Ready for tankless? Tankless water heater installation and repair.
Switching from a tank, replacing an old tankless unit, or adding a second one. We mount the heater on a garage or outside wall and hook up the venting, gas and water lines.
Hablamos español. Ver en español
Sound familiar?
- Hot water runs out with your tank heater
- Switching from a tank to tankless
- Tankless unit not firing or showing an error
- Hot water going cold in the middle of a shower
- You want the heater off the floor, on a wall inside or outside
What we do about it
- Indoor or outdoor
- On a garage wall or an outside wall, with the venting, gas and water connections it needs.
- One unit or two
- A single tankless unit, or two side by side when you need more hot water at the same time.
- Repair or replace, honestly
- If your tankless can be repaired we say so. If it’s time for a new one, you hear the price before we start.
Tankless water heaters, in our customers’ words
“They showed up about an hour after I called and had things completed right away. Fast and efficient service at a reasonable price.”
Robert W., OaklandToilet reseated, “The job was done cleanly and quickly and Issac was really great about giving helpful advice for next time as well as answering a lot of other questions I had. … Estimates were accurate and totally transparent.”
Connie B., San FranciscoRepair, plus help with faucet pressure, “I had a weekend emergency and they were at my house in 30 minutes.”
Mary S., San FranciscoWeekend emergency, “Called AB's Plumbing Service for a clog flooding out our driveway. They came out within 45min. … Ab, Issac and Omar were very knowledgeable and helpful. They are considerate about pricing.”
Jeffrey J., OaklandClog flooding the driveway, “They snaked the pipe and cleared out all the grease and oil buildup that was causing the problem. Even better, they took the time to explain how to prevent it from happening again, which I really appreciated. … They wore shoe covers in the house and cleaned up thoroughly afterward.”
Claude Q., Union CityClogged kitchen sink cleared, “Came out right away, fit me in for work the next day, fixed my standing water under the house problem by digging down through concrete & placing a sump pump then tied it into the sewer line. He and his team were professional, efficient, cleaned up perfectly afterward, all at a good price.”
Cheryl R., OaklandSump pump for water under the house,
Show 3 more reviews
“Called AB's Plumbing Service for a clog flooding out our driveway. They came out within 45min. … Ab, Issac and Omar were very knowledgeable and helpful. They are considerate about pricing.”
Jeffrey J., OaklandClog flooding the driveway, “They snaked the pipe and cleared out all the grease and oil buildup that was causing the problem. Even better, they took the time to explain how to prevent it from happening again, which I really appreciated. … They wore shoe covers in the house and cleaned up thoroughly afterward.”
Claude Q., Union CityClogged kitchen sink cleared, “Came out right away, fit me in for work the next day, fixed my standing water under the house problem by digging down through concrete & placing a sump pump then tied it into the sewer line. He and his team were professional, efficient, cleaned up perfectly afterward, all at a good price.”
Cheryl R., OaklandSump pump for water under the house,
Recent tankless water heaters work
Two tankless water heaters, side by side 
Rheem tankless with insulated lines 
Indoor tankless with service valves 
Outdoor tankless next to the gas meter 
Tankless water heater installed on a shingle wall 
Outdoor tankless with new drain and water lines
How a job goes
Four steps, each one backed by a customer’s own words.
- 1
You call or text
Day or night. Tell us what’s happening, and send a photo if it helps.
“They responded on the first call and gave text updates.”
Jeff J., Hayward, on Yelp - 2
We find the cause
We diagnose before we fix. For drains and sewers that can mean a camera down the line, so you see it too.
“He then ran a camera through the line and showed me exactly what was causing the backup: tree roots had intruded into the sewer pipe.”
Natalye B., Oakland, on Yelp - 3
You get the price first
We explain the fix and what it costs before any work starts. No hidden fees.
“Estimates were accurate and totally transparent.”
Connie B., San Francisco, on Yelp - 4
We fix it and clean up
Shoe covers on, work area cleaned, and everything tested before we leave.
“They wore shoe covers in the house and cleaned up thoroughly afterward.”
Claude Q., Union City, on Yelp
Get a free estimate
Tell us what’s going on and we’ll call you back. If something is flooding or backing up right now, calling is fastest.
Rather talk to someone?
Call (510) 753-8649Or text us a photo of the problem. Hablamos español.
Email us at contact@abs-plumbingservices.com
New customers get 10% off their first service. Mention the website when you call.
Tankless water heaters: questions people ask
Can you switch my tank water heater to tankless?
Yes. We take out the old tank and install the tankless unit with the venting, gas and water connections it needs. We look at your setup first and give you the price before any work starts.
Which tankless brands do you install?
Our recent installs include Navien and Rheem tankless units. Call us and we’ll talk through what fits your home.
Do you repair tankless water heaters too?
Yes. Call or text us what the unit is doing (a photo of any error on the display helps) and we’ll tell you the next step. Repair or replacement, you get the price first.
How fast can you get here?
It depends on where you are and what’s going on, but for emergencies we head out right away. Reviewers regularly mention the crew arriving within the hour.
Are you really open 24/7?
Yes. Call any time, including nights and weekends.
Will I know the price before you start?
Yes. We look at the problem, explain what’s going on, and give you a price before any work starts. Estimates are free.
Other things we fix
Water heatersRepair and replacement for gas tank and tankless water heaters, installed to code.- Recirculation pumpsHot water recirculation pumps installed and replaced, so hot water reaches the tap sooner.
Emergency plumbingBurst pipes, sewage backups, overflowing toilets. Open 24 hours, 7 days.
Drain cleaningSinks, tubs, toilets and main lines cleared. Camera inspection when it keeps coming back.
Sewer linesRoots, breaks and backups found on camera. Sewer lateral repair and replacement.
Leaks & water linesPipe leaks, water service lines, pressure regulators, filters and softeners.