Comet Plumbing & Sewer
Company Overview
As a licensed plumbing contractor (Lic No # 951887), I have more than 15 years of expertise in home plumbing. We are committed to delivering top-notch services, from rooter services and drain cleaning to trenchless sewer replacement. Our service vehicles are stocked with everything needed and the most advanced technology to address your plumbing and sewer requirements.
As a fully licensed and insured contractor, I bring more than 15 years of experience in rooter services and drain cleaning and I focus on trenchless sewer repair and replacement and sewer diagnostics with state-of-the-art sewer camera technology.
My approach is to ensure that clients have a positive plumbing experience. Integrity and quality are fundamental values that I deeply value, and they underpin great business practices.
We happily provide services to families in Sunnyvale, Cupertino, Mountain View, Los Altos, Santa Clara, Campbell, and San Jose.
Business Services
- Drain installation
- Drain repair
- Faucet installation
- Hot water recirculation pump installation
- Hot water recirculation pump repair
- Hydro-jetting
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
Mon: | 7:30 AM - 8:30 PM |
Tue: | 7:30 AM - 8:30 PM |
Wed: | 7:30 AM - 8:30 PM |
Thu: | 7:30 AM - 8:30 PM |
Fri: | 7:30 AM - 8:30 PM |
Sat: | 8:00 AM - 7:00 PM |
Sun: | 8:00 AM - 7:00 PM |
Recommended Customer Reviews

I had a main water break and needed a quick response late on a Sunday. Andrew came out that evening to look at it and was able to schedule time between appointments the next day. He communicated well and got the job done quickly to get water back on to the house. I would recommend highly.

Andrew was prompt, courteous, and professional.
We needed to replace two toilets. I had a lot of questions as this is my first time replacing toilets :-) Andrew answered all my questions via numerous text message exchanges which gave me a very good idea of the project and made me feel comfortable about it.
After that initial consultation, Andrew not only finished the job with an very quick turnaround time, he also managed to save us some money buy getting the new toilets with wholesale pricing - which we originally planned to buy from Home Depot.
I would highly recommend you to consider giving Andrew a call for your future plumbing needs.

I could not be happier with the service Andy and his crew provided. Our entire system backed up in a Saturday and I called around that evening and Andy was able and willing to come over within the hour to diagnose. He was knowledgeable and knew right away what the problem was. He is then confirmed it with a camera sent through the pipes. Work to replace the main line between the house and the street was done within the week for what so far as I could tell by doing some quick research was a reasonable cost. He was professional and humble and very responsive. I would absolutely hire him again. Thanks, Andy!

I met Andy as he was doing a sewer lateral job in Sunnyvale for a client. They were so happy with his service that I got his information to refer to my real estate clients. Since then, I have referred him to my clients and colleagues and always hear back how happy they were with his service. He is a professional, charges a fair price, does a great job and is pleasant to be around. I will continue to refer him to my friends, clients and colleagues.
Ted Paulin, SF Peninsula Realtor

Comet plumbing helped us with an emergency when other plumbers took a holiday. Then they helped again on a scheduled visit. Prompt, professional, effective and contentious, both times!

Had a backup on main sewage line while having a party on a weekend. Andrew came out to do a routine cleanout but my sewage line was damaged and had a severe discontinuity. Nothing I didn't already know. I've had at least one backup and cleanout every year. Each and everytime, a plumber shows me the tape. It had progressively gotten worse. I finally decided to get it fixed once and for all. He stayed through the day, was able to get one of his workers over and started digging. Did I mention it was raining and it was a Sunday. Was able to at least have it usable that same day. Very courteous and professional. Great communication. Offers fair pricing. Available on weekends. Definitely will use again for future plumbing needs.

We had water heater issue in our condo. I called Comet and Andrew said he will be there in half hour and was there before that waiting. He just told me that since it is leaking it need to be replaced. The install looked very complicated since it was in a small closet and is used for space heating also. I consulted few plumbers and Andrew was the only one who was promptly returning the call and tried his best to get the unit in one week. The workmanship is excellent and we are very happy with this work. It has been one week since we installed our new water heater and it is been working great. While going through the heater issue I understood how difficult it is to find a good plumber and I must have called more than 10 plumbers. Our experience with Andrew in terms of work or cost or dedication or honesty was excellent.

Our bathroom had water seeping out from the toilet base. The toilet seal to the drain had broken. This is something I wanted fixed quick. They returned my call within an hour and made it out to the house a few hours later. They were quick, careful, and cleaned up afterwards. Their initial estimate on the phone was spot on. It has been a week and all is working great. Thanks!

The city informed me there was a leaking pipe on my side of the water meter. I solicited plumbers via Yelp. Andrew responded straight away and did some preliminary inspection, which involved some digging. He confirmed what the city water crew surmised: The 53 year old iron pipes were due for replacement.
Andrew gave me a rough price and time estimate, which I accepted.
The job required substantial digging through and around extensive tree roots, under the sidewalk and around subfloor concrete abutments.
The work was done on time; the price was more than fair and allowed me to make some other updates to the old fixtures, water heater and porcelain. The finishing work was also very good.
Andrew and his crew were very neat, efficient and polite.

My husband and I woke up Xmas Eve to a wonderful gift from our house: a broken water heater with NO hot water. Since we were hosting our family Xmas dinner, this was quite the curve ball in our plans.
After basic troubleshooting, we realized the 28-year old water heater had finally croaked. We called several plumbers only to find voicemails. Just when we were getting disheartened and brainstorming back-up plans, Andy called back. Yes!
He came for the house call and evaluated our situation. He agreed with our assessment, and that we needed a new water heater. He wasn't planning on working today, but seeing our dead water heater, he decided to come and help us. Seriously, how many plumbers would do that on Xmas Eve?!? Thank you, Andy!!!
We decided, to respect his time since he was suddenly working on Xmas Eve, he would take a couple other house calls while my husband and I went to buy the water heater. When he returned, he spent 4 hours removing our dead water heater and installing our new heater.
Andy is incredibly detail oriented. He pointed out several ways in which our old water heater (installed several owners ago!) was not up to code, from non-functional earthquake straps to unsoldered copper pipes! (Yikes!) The new copper pipes he soldered was routed like a pro (I'm an engineer, and it was exactly how I would have wanted it! Keep in mind, I did NOT direct/ask for the routing, he just did it like a boss!).
There was a minor mishap, which is why it's a 4-star rating instead of 5-star, but I won't go into it, because his overall work quality is spot on. Plus, we're all human, so we all make mistakes.
I tried to offer him food/drink along the way to express my gratitude for his work, but all he would take was one Coke Zero and a hot coffee.
Overall, my husband and I very much enjoyed working with Andy. He was professional, kind, considerate, and did an amazing job ALL ON XMAS EVE! Thank you, Andy!!!