
Serving Knightsen, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Kitchen drain line backup. They cleared it like a champ!"

*The Angi rating for Drain Pipe Installation companies in Knightsen, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Drain Pipe Installation needs.
*The HomeAdvisor rating for Drain Pipe Installation companies in Knightsen, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Drain Pipe Installation needs.
Last update on June 01, 2026

Serving Knightsen, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Kitchen drain line backup. They cleared it like a champ!"

Serving Knightsen, CA and surrounding areas
Approved (Corporate)
In business since 1981
Free estimates
Warranties offered
"My wife and I bought a house a couple years ago, and became owners of a radiant heating systems installed more than 20 years ago. Tony and Damian did a great job of understanding how my radiant heating system works, what repairs were needed/what was failing, and where upgrades were needed. They replaced the pump, both expansion tanks, and the neutralizer. Additionally, they noticed the hot water tank was installed incorrectly, and the hot and cold water connections were flipped. It's amazing the system worked, and it's nice to have a system that's correctly installed (even if it's 20 years later!). Additionally, they secured the expansion tanks to the wall (now required by code), replaced the deteriorating copper pipes connected to the neutralizer with plastic (I'm sure this is code now as well), and re-routed the overflow pipes to the outside (rather than the floor!). You can't go wrong with these guys, well done, they're true craftsmen to the trade."





+73

Serving Knightsen, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2000
Free estimates
Emergency services offered
"Harry was very thorough and professional. He replaced the shut-off value under the toilet and rebuilt the inside of the tank. He then fixed the leaking pipe under the kitcken sink. Everything is working great so far. I would definitely use H K & S Plumbing if I ever need service again. Reasonable and a pleasure to work with."

Serving Knightsen, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2009
Free estimates
Emergency services offered
"These guys were great. Professional, knowledgeable, thorough. Fixed my leaking/broken sprinkler manifold system- really impressive and well thought out approach to fixing our issue and avoiding the problem from coming back anytime soon. Really glad I found them. Did great work- and took pride in the quality of their work. Will definitely hire them for additional projects."





+2

Serving Knightsen, CA and surrounding areas
Approved (Corporate)
In business since 2023
Free estimates
Warranties offered
"Several months ago, I noticed that doors in my house were no longer closing and latching. Specifically, my front door no longer locked completely. Once I got it fully locked I could no longer open my front door anymore, so I knew I had foundation issues. I called Bay Area Underpinning to come look at my foundation and do some measurements. We discovered that my front living room was sinking approximately one and a half to 2 inches. The crew, Lance Sladek, Jake Hall, and Eddie Shaw, crawled under my house and dug 30 to 40 foot holes in the ground to install piers that would lift my foundation. These gentlemen worked in very cramped dirty conditions in 90-100° weather. I was extremely happy with their work and their dedication to doing the job correctly. My after the foundation lift, my front door as well as several other doors in my home were able to close and latch again."





+16

Serving Knightsen, CA and surrounding areas
Approved
In business since 2010
Free estimates
Credit card accepted
"Retaining wall replacement project: 50' wood retaining wall with French drain behind it Victor is a very competent, customer oriented businessman with attention to details during project execution. Professional engagement (first visit, quote, Q&A, contract) Project management (on-time project start, efficient execution and timely completion) Final walk-through to answer questions. We are discussing other projects with Victor. It's a pleasure to have found him through Angi."





+22

Serving Knightsen, CA and surrounding areas
Approved
In business since 2009
Free estimates
Warranties offered
Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!





+46
Serving Knightsen, CA and surrounding areas
Approved
In business since 2015
Free estimates
Credit card accepted
We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.\n
Serving Knightsen, CA and surrounding areas
Approved
In business since 2014
Free estimates
Warranties offered
"I sent him this: Hi Pablo, I want to make sure we are on the same page and my apologies for any misunderstandings. Original quote was for $1,800. Then changed to $2,100 for using Rain Bird products. We agreed Which I listed in a text on Jun 25, that I wanted specific valves, controller/timer and a rain sensor. Then you started the work and an addition $200 was added for repairs/leaks, bringing the total to $2,300. We agreed. We sent you $1 to confirm Zelle was correct and then Zelle'd $1,150, which was 50% of the $2,300. When you came out to install the correct controller/timer, I asked about adding Zone 8. You said it would be $250. I sent you a text, July 2, requesting a $100 charge for the Zone 8 valve, and you would not need to install the Rain Sensor. We spoke on the phone today July 3, in the am regarding some leaks and you said, $150 would be fine for Zone 8. You installed Zone 8, added 2 more sprinkler tops/units for $15 each and a receipt for $38.86. We sent a Zelle today (July 3) for $1,368.86. That would have been the remaining $1,1150, $30 for 2 additional sprinkler tops/units, $150 install for Zone 8 and the $38.86 receipt. The 2 sprinkler head/units, we did discuss today, are incorrect, because they water the wall and you would replace those. If I missed something, please let me know. It's important to me, to make sure you have been paid correctly. I would still like to hire you to add a shut off for the top 4 valves and add additional drip system, to make sure all the plants are being watered."





+23
Serving Knightsen, CA and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
Here at Raya Engineering, we sustain our company on the principal that our customers come first. We offer services that are tailored to your needs and we're ready to show you what our experience can bring to your project! Call us today!
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