Comet Plumbing & Sewer
Company Overview
With a valid plumbing license (Lic No # 951887), I bring over 15 years of experience in residential plumbing. Our focus is on providing exceptional services, from rooter services and drain cleaning and trenchless sewer replacement. Our service vehicles are stocked with everything needed and the most advanced technology to handle your plumbing and sewer issues.
Being a licensed and insured contractor, I have over 15 years of experience including expertise in rooter services and drain cleaning and I focus on trenchless sewer repair and replacement and sewer diagnostics with the latest sewer camera technology.
My approach is to ensure that the plumbing experience for clients remains positive. Honesty and quality are core values that I deeply value, and they form the foundation of successful 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 called Comet for the first time after seeing positive Google reviews when I thought my garbage disposal had gone kaput. Instead of immediately setting the stage to collect fees and schedule a costly visit, Andrew patiently asked a few questions and determined that my garbage disposal simply needed to be reset. He then proceeded over the phone to walk me through exactly how to do it myself. Five minutes later, my garbage disposal was working perfectly again! I am convinced this is an honest-to-goodness business and am now awaiting a quote for a shower faucet replacement!

We had a great experience with Comet. The review is a little over due. The day after christmas last year, our sewer line decided to collapse. Luckily we got through Christmas day first! We didn't realize of course, that it was our sewer line. We just thought we had a clogged toilet that my husband couldn't snake. We called another place first who came with big snake, which didn't do the trick. He took off to go work on another job leaving our bathroom a mess - our toilet was torn off and the floor was all wet. We called Comet after that and instead of going blind, he sent his scope down and figured out the line had collapsed. No snake would fix that! The whole process took a few days, but he dug out the front yard and replaced the line. My only complaint was that our yard didn't get put back together well ... the lawn is still terribly uneven where it was dug out, but we've got a sewer line, so that's what's important. I'd call him again for any help we need.

I couldn't agree more with the comments from Jon C. Finding a good reliable plumber is difficult at best. We found ourselves in a desperate need of a plumber on a Sunday afternoon. One call to Comet and Andrew was at our place within 30 minutes, after looking at the issue with our backed up kitchen sink he provided us with a quote before the work, got right at the problem and was done in 30 minutes and charged us exactly what he said he would. Problem solved and now a fantastic plumbing resource on file. Thank you Andrew !!!

My husband managed to punch a gaping hole in our underground water main while gardening. Of course, this happens on the weekend. We panic as water gushes across our yard, the neighbor's yard and into the street.
Called Comet and Andrew promised to be out in 1/2 hour. He came when promised, fixed the problem and abided by his original quote even though it took a bit longer than he originally thought (we had an unusual size of pipe). And it was much cheaper than I feared it might be! He didn't gouge us for emergency, weekend rates. He was kind, calm and a pleasure to deal with.

After going through several plumbers, I finally found a good one!! I had Comet Plumbing come out to look at some other plumbers unsatisfactory work (unclogging a clean out, which still was clogged) Andrew of Comet Plumbing not only unclogged it, but used the proper size rotor blade. Andrew explained to me throughly that it was only a temporary fix because my real problem was the tree roots that were blocking and had damaged the pipes over the years. Andrew described in detail what kind of ""pipe replacement"" work needed to be done and offered a reasonable price. I asked ""would he be the one on the job or someone else"" because that is something very important to me. He responded that he is the one on the job when it comes to the actual plumbing work (not the digging etc.) and he was there all the way through! The work was completed within a week and everything was replaced and cleaned up just like he said it would.
I will continue to use Andrew of Comet Plumbing for all mine and my families plumbing/sewer needs.

I got call from my son and our toilet won't flush...I was just finishing work so i stopped by home depot and rented a snake....that dam snake would not fit into the toilet...so i started calling...the first place i called would not give me a price over the phone and could not tell me what they charged by an hour but only what they charged to diagnose. I felt it was fishy that they could not give me an idea of the cost....so I said no thanks....I then went to google and the comet plumbing and sewer was on the top of the page....I called and the owner answered...he was friendly and knew his stuff....He told me up front what he was going to do and how much it would be for him to travel and do the job...the total cost....guess what he was right and called it over the phone....he was friendly and an expert in his field....He took credit cards and I only wish I could give 6 stars....thanks Andrew!

I have a great plumber for work inside the house, but when my sewer line showed signs of needing replacement, I asked a local contractor and was referred to Comet Plumbing and Sewer. Andrew is a consummate professional. He did good work, came when he said he would, showed up numerous times to make sure everything was as it should be during a week-long ordeal with city permits and inspections, and even labored for hours in the rain to ensure my service would not be interrupted. He gives a 10-year warranty on his work, so hopefully I'll never require his services again, but should there ever be a need, I'd call him in a heartbeat.

I hire Andrew on a Saturday to fix a totally blocked sewer pipe. He arrived right on time at 3:00 and started for 1 hour to find and few the blockage on his video camera. Line was too ... full of ... *$#% to see anything. He used an electronic device (feeding off the camera's signal) to find the blockage... which was about the location I expected.
He said that old pipes in Sunnyvale use this Tar/Paper material (my house was build in 1954) or clay pipes. After 60 years, they are cracked and my very thirsty fruit tree had found a nice source of water!!! (the Drought has made my garden quite parched).
The then focused on the clock and after 45 minutes total.. the pipes were clear and he was gone. I found him honest, very friendly and spoke with an English (UK) accent. I Give him 5 stars for once he got the toilet off, the pipes were clear in 10 minutes. I might use him to lay new pipes and install a dual Sewer Clean Out next weekend once I check his references.
I will post another update if I select him to install the house to City pipes... has to be done because.....
I had the same issue 4 months earlier and I called another Sunnyvale Plumber. He showed up 90 minutes late, spoke very little English. He had a very hard time trying to fix my blockage and nearly gave up. Cost was a bit higher than Andrew's final price.
The other plumber told me ""Tree... Roots.... BAD PIPES"".... and I knew Judgment Day would arrive sooner than later. I would give this guy 4 stars and did not call him for I do like to talk and understand a person that will cost me a few thousand dollars to fix.
Andrew seams very honest and easy to work with. 5 stars for he appears to know his stuff and was not trying to push anything too expensive.
Andrew was complaining about old Yelp Reviews... I looked at Barbara G. and Gordon F. reviews and they both seam rather negative all around to others. Not sure if they are real or just very negative persons. Gordon only left 3 reviews and 2 are 1 star for two local plumbers.... sounds funny since only Fake and Really pissed off persons place 1 star reviews.

Andy came out and did great work. Low price and finished on time. Under bid competitor. Very friendly and courteous. Will have him do all my work from now on and would recommend to friends and family as well.

We couldn't be happier with the service we got from Andy and the guys he has working for him. A week after moving into our new rental house our toilet bowl wouldn't drain and waste water was going into the bathtub! After the landlord suggested dumping a large bucket of water down the pan we got approval to call an emergency plumber - this was around 7 in the evening. Andy arrived within the hour and stayed until 11 to video-scope the pipe to the sidewalk and found several blockages that he was able to snake out. He even had to excavate for access to the pipe that evening as the house was too old to have something called a ""clean out"" on the property.
After this he handled all the communication with the landlord about replacing the pipe as it was old and rotten beyond salvage. He and his guys dug a trench, replaced the pipe and put the garden back the way it was such that you'd hardly know they'd ever been there.
Honest, hardworking and very communicative about the work being done and how long it will take - I wouldn't hesitate to recommend Andy to anyone requiring plumbing work.