Top-rated tankless water heater installers.

Get matched with top tankless water heater installers in South Pasadena, CA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Top-Rated Tankless water heater installers in South Pasadena - Updated Nov 2026

Avatar for Payless Water Heaters & Plumbing
Payless Water Heaters & Plumbing
4.2(
132
)
Tankless Water Heater - Install

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Perfectly. They cleaned everything up, explained how the system worked and how often it needs attention, and hauled away the old hot water heater. They arrived on time, worked steadily, and finished before dinner time."
New Tankless Water Heater Installation
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+19

Response time8 hrs
Response rate100%
Recommended by73%of homeowners
Avatar for Speedy Water Heaters and Plumbing
Speedy Water Heaters and Plumbing
5.0(
21
)
Tankless Water Heater - Install

Serving South Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"The entire process from the initial call to actually getting to take a shower was easy and pleasant with Speedy Water Heaters. They were upfront with pricing, quick to schedule, installation was clean and timely, the tech was knowledgeable, efficient and so patient with all my questions. I would definitely recommend Speedy Water Heaters to my friends and family! Great job!"
Response time3 hrs
Response rate93%
Recommended by38%of homeowners
Avatar for Western Rooter & Plumbing
Western Rooter & Plumbing
4.8(
172
)
Tankless Water Heater - Install

Serving South Pasadena, CA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"I had my tankless water heater serviced by Daniel W. Daniel was throughly professional during his entire visit. I would highly recommend Wester Rooter for all of your plumbing needs."
Ruben installs a new drainage system under a customers home. Working in a crawl space is rough, but we do what is needed.
Backing up? Got roots? Blast those roots out with a Hydro Jetter! We use a wart hog nozzle that combines controlled rotation with a unique 8 jet cutting configuration optimized for removing roots. It’s better with a jetter! Call us! We got this! ??
Sewer Line Camera
No drain clog too big or small, Western Rooter covers them all!
Justin clearing a Kitchen sink back-up after the Memorial holiday.
HALO 5 whole house water filtration system.

+542

Response time12 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for Leon Plumbing
Leon Plumbing
4.8(
79
)
Tankless Water Heater - Install

Serving South Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1983

Free estimates

Emergency services offered

"This company responded quickly and provided excellent customer service. They were here in 24 hours, removed the old tank water heater and installed the new tankless water heater quickly and efficiently."
Tankless Installation (RUR199e with wifi)
Exterior Tankless Water Heater
Dual Tankless Water Heater Installation
Tankless water heater ACE PRO
Tankless Water Heater Service

+8

Response time8 hrs
Response rate94%
15 neighbors recently requested a quote
Avatar for G M C Plumbing, Inc.
G M C Plumbing, Inc.
4.9(
86
)
Tankless Water Heater - Install

Serving South Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"Very professional. Prompt. Tankless water heater has been working fine ever since. Hired another plumbing company before calling G M C. They were half the price. But did not solve the problem. David with G M C diagnosed the problem. Completed the work. No problems ever since. Thank you Angi, thank you David and G M C Plumbing."
New Drainage
Old  shower Drainage
New kitchen faucet
New Drainage
New Drainage- SEWER LINE

+3

Response time5 hrs
Response rate97%
24 neighbors recently requested a quote
Avatar for HARMONY ELECTRIC PLUMBING & AIR INC
HARMONY ELECTRIC PLUMBING & AIR INC
4.8(
36
)
Tankless Water Heater - Install

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"They called us quickly and got a plumber out within a few days. Super thorough - tested all pipes and water sources to diagnose the problem. They were able to perform maintenance on most bathrooms the same day and improve the water temperature in our showers. Gave helpful, non-biased advice on potential further plumbing improvements. We will likely call this company again for any and all future plumbing needs."
826 neighbors recently requested a quote
Recommended by38%of homeowners
Avatar for Alliance United Rooter & Plumbing Inc.
Alliance United Rooter & Plumbing Inc.
4.9(
123
)
Tankless Water Heater - Install

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide. It is our mission to provide excellent workmanship and complete customer satisfaction from the start to completion of a project. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

drain under kitchen sink
drain under kitchen sink
drain under kitchen sink
drain under kitchen sink
drain under kitchen sink

+62

4 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Fix It Quick Plumbing Inc
Fix It Quick Plumbing Inc
5.0(
26
)
Tankless Water Heater - Install

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Jonathan and Joaquin replaced our water heater and it went smoothly! They showed up on-time and finished in the amount of time they said it would take. Really appreciate their professionalism and efficiency!"
Drain&Rooter Service
Cleanout Install
Hydro-Jetting
Descale
Camera Inspection

+10

Response time5 hrs
Response rate100%
Recommended by4%of homeowners
...
Showing 1-10 of 240

The South Pasadena, CA homeowners’ guide to tankless water heater installations

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