Covina Tankless Water Heaters

Tankless Water Heaters.

A tankless water heater heats water on demand, so there's no tank to keep hot and no running out halfway through a shower. We install Navien tankless water heaters and handle the gas, venting and electrical work a conversion needs.

Call (626) 360-8993 Get a free quote

10% off for new customersOn invoices up to $1,500. Through 3/31/2027

Financing availableCheck if you prequalify with Wisetack

Flash Plumbing technician servicing a gas tank water heater with an expansion tank

Tankless Water Heaters

Signs it's time to call.

Your tank heater is near the end of its life
You run out of hot water often
You want to free up floor space
You want lower standby energy use

What's included

Navien tankless installation
Tank-to-tankless conversions
Gas line and venting upgrades as needed
Descaling and maintenance

Call (626) 360-8993 Get a free quote

Why Flash Plumbing

Plumbing done the honest way.

Open 24/7
Burst pipes and sewer backups don't keep office hours, and neither do we. Call any time, any day.
Upfront pricing
You get the price before the work starts. No surprises on the invoice.
Family-owned & local
Founded by Daniel Palma and based in Covina. We treat every home like our own.
Stocked trucks
Our vans roll in ready to finish most jobs in one visit, so you're not waiting on a return trip.

Reviews

Neighbors who call us back.

Read more reviews

Excellent job, respectful team

Flash Plumbing Inc did an excellent job! They swapped out the 40-gallon tank for a new tankless heater. The entire time, they were professional, courteous, and respectful. They left the area cleaner than when they started.

Iris Z.
Daniel & crew are great

Daniel and crew were great, taking the time to get my 50-gal water heater installed right and now looks great with working shut off values!

Ruben R.
The only plumber we will call

A fair price and a really easy company to work with. I’ve lived in my house for 10 years and have used 3 plumbers. This is the only plumbing company I will work with again.

Michael L.
Fixed leak same day

Flash Plumbing Inc took my job on the same day! I had a leaking toilet upstairs that threatened to damage the ceiling downstairs. The guys arrived and fixed the issue! Will definitely use them in the future.

Kenneth R.
Outstanding service & workmanship

Service and workmanship are outstanding. Great family-owned business. Very easy to work with. Very responsive. If you need a plumbing service, you should definitely be calling Flash.

Robert L.
Professional, great service

Flash Plumbing Inc checked out my plumbing problem and gave me different options on how to fix it. I am so grateful for them. They were professional and provided great service. I will recommend them to many friends.

Lilia Z.
They explained everything

Flash Plumbing Inc had top customer service and amazing communication. Daniel and his team explained the whole process and gave me options. Honest, cost was affordable, and very skilled in plumbing.

George G.
Honest assessment & quality work

I’ve used Flash twice: once for a major operation to replace some shower pipes and once for a simple kitchen sink clog. In both cases, they were great! Responsive, same day service, and honest assessment of my options. Fast and high quality work.

David M.
Seamless experience

I would highly recommend this company. I had a seamless experience. Pricilla the manager was lovely to deal with and very helpful with all of my questions.

Sasha K.