Sebastian, Project Manager, and Technicians Joaquin and Connor were excellent to work with. I appreciated the pre-appointment communication, including photos of the technicians; and Sebastian promptly and patiently answered my questions throughout the process. Joaquin and Connor were professional, efficient, and treated both my condominium building and my home with great care. I highly recommend Flow Masters Plumbing. read more

Was quoted $19,000!!!!! to do a like for like replacement of my Baxi combi boiler with a Navien unit (no change in placement/positioning of pipes) after they also claimed (incorrectly) I needed additional ventilation to the roof installed I pointed out that it is already to code (thanks AI) They refused to provide an itemized bill after multiple requests or breakdown of how they arrived at an astronomical $$$, tried to upsell me to high end European models that would be hard to maintain in the US market. Considering the replacement Navien unit I asked for is $2500 and OK they will pull a permit for 1k (also high) then they're charging between $500 and $1000 hour for labor. For simple welding and testing the unit. Apparently they were acquired by a Private Equity (this is happening all over SF now where mom and pop plumbers are actually owned by PE firms behind the scenes... read more

My house has a fairly complex and unusual radiant heating system in which the heating for the water and my house are intertwined which needed to be completely replaced. After having 3 different plumbers pass on the job due to the complexity I had a friend refer me to Flow Masters. Alberto and his team did a great job. Excellent communication throughout and they had it all done within 48 hours. Highly recommend them. read more

Flow Masters has recently completed a number of plumbing jobs for me, including replacing my hot water heater, and, most recently -- finished this week -- replacing the cracked ceramic pipes underneath my patio: no easy assignment. Alex and Obed, the crew, were super: expert, efficient, cordial, and attentive to detail and cleanup. Among other tasks, they were able to lift up my patio tiles without breaking them, and place them back again once the work was done: my chief concern with this job. Jeremie, the contact person, has also been excellent all through these assignments: very clear and prompt in his responses. I highly recommend the company. read more

Service was friendly and polite, repairs were adequate. The pricing seemed a bit steep, but there are worse out there. To replace a pop up drain and p trap (all PVC pipes) cost $765. Plumber worked for about an hour. Cheaper than Caccia but probably more expensive than others. read more

Flow Masters Plumbing consistently provides excellent service across a broad range of products including my Navien water heater, whole house water filter, Moan leak detector and my sinks, faucets and toilets. Today Joaquin replaced the neutralizer pellets in my water heater. He and the Flow Masters team are always ready to help me. They understand how important it is for their customers' peace of mind to respond quickly and fix the problem and getting the job done right and at a reasonable price. I've been a Flow Masters customer since 2018 and am very happy with the service they provide read more

The heat was not working. Hit the thermostat and it started working. Plan to replace it No charge.

Very good Plumber Kevin, skills and personality. Flowmaster's pricing is very high however. Recommend getting at least one other quote. I had an immediate problem and could not do so. read more

Flowmasters plumbers, specifically Oscar, Connor, and Sebastian, replaced two large rusting pipes in our garage (kitchen sink drain and gutters pipe) and updated the system to meet code. Their work was skilled, efficient, and neatly done. A few days later, the heating technician did service on our hot water heated and domestic heating system, also with skill and professionalism. I plan to hire the Flow Masters teams in the future. read more

Flow Masters is EXCELLENT. Tree roots cracked our 1940s clay pipes which caused a major backup with water pooling (and rising!) in our garage during days of an atmospheric river deluge. Flow Masters assessed things and jumped in to diagnose and fix the situation. Communication was fantastic every step of the way. Price was fair. The work is solid. And the whole crew was professional. Thanks to Oisin W. and team for all the hard work! read more

Flow Masters Plumbing - Flow Masters in action. Our Juniper tree roots busted the clay pipes, causing all kinds of havoc. - Plumbing Near Me - Daly City, California

In my mind Flow Masters Plumbing is professionalism. I had a second plumbing job with them. Oscin Woods and his assistant, Chase Futia came out to install a few valves, replace pipes and install a faucet in the bathroom. They were punctual, attentive and overall did an excellent job. I also would like to thank Sebastian Graham for the pre-job evaluation. I would have no hesitation recommending Flow Masters to other people. read more

Flowmaster showed up quickly and got the job done in spite of some obstacles. Good work~

We hired Flowmasters for a water heater issue (mysterious loud and concerning noises) and they were able to send a technician, Sebastian, out on New Years Eve. He inspected the water heater and we ultimately agreed to replace it, which Kevin and another team member did the following week. Communication with Flowmasters was responsive and easy, even around the New Years holiday, and it helps to have a text update when the technician is on the way (with their name and photo so you know whom to expect). The technicians were professional, considerate of the rest of the home, and prompt. The replacement took 5 hours given the tricky positioning of the heater and pipes, but they kept me updated with their progress. I would use Flowmasters again! read more

These guys are great. I've used them several times and all of the plumbers they've sent to. My house were friendly, competent. Neat knew what they were doing. I also had a recent emergency that involved my kitchen being flooded from something broken in the dishwasher and they responded immediately. I really appreciate that read more

Excellent service many times over the years. But in one instance, in particular, they went above and beyond. Specifically, we called and spoke with Myra and Tina about a timely matter that some companies wouldn't necessarily consider to be timely. In this case, both Myra and Tina were incredibly receptive, friendly, and prompt in following up. read more

After my excellent experience with Flow Masters this weekend, it is a true pleasure to write this review. It is a little lengthy, so if you don't want to read the entire thing, I will say I unhesitatingly recommend Flow Masters based on their efficiency, honesty and seemingly incredible work ethic! Why? Read on ... :) Our boiler began emitting strange noises on Friday night, and then completely shut down on Saturday afternoon. Our regular plumbers were closed and I recalled seeing Flow Masters trucks in our neighborhood, so I called & amazingly, they said they might be able to send a technician over the same day! Miguel arrived about an hour later & quickly identified the defective part on the boiler. As supply stores are closed on the weekend, he checked with his shop to see if they had any in stock. When he couldn't reach someone on the phone, Miguel offered to drive back to the shop himself (about 30 min away) and said he would return if they had one. Again, bear in mind it is Saturday at 6pm at this point! He called 45 min later & was upfront that the replacement part in stock was not new, but it would do the trick. He was back at our house 40 min later and then spent the next 2 hours installing the part. It was after 9pm (remember, this was a Saturday!!) by the time he finished. Here's the best bit - Miguel said they would only charge me for the labor costs, not the part itself as it wasn't new!! He then encouraged me to do a Google search for the cost of a new part, and that they would be happy to come install a brand-new one when I was ready. The entire experience was excellent from start to finish. They sent someone right away. Miguel was highly competent and cared very much about the quality of the work. There was transparency on pricing and no hard sell. Overall, a 10/10 and I will be using Flow Masters regularly going forward! read more

Scheduling was easy, technicians were a little out of the arrival window but did the work efficiently and professionally. Billing and payment were made easy to perform. Cost (according to an internet search) was on the higher range but few other companies on Yelp were willing to do the work (our boiler is from the 1960's). read more

Flow Masters responded quickly to a garbage disposal issue. AJ was timely and efficient and did a great job.

Flow Masters was a life saver!! We had a leak from our kitchen sink/ garbage disposal but we weren't sure where it was coming from. I used Yelp Request a Quote, and within minutes Flow Masters got back to me. I sent the request Thursday night @ 8pm & they had confirmed an appointment for 8am Friday morning. LIFE SAVER! The technician that came, Emmett, was EXCELLENT. He found the leak, told me it had been going on for some time (UGH), and fixed it all within 30 minutes. He was so polite, efficient, and even dealt with my barking dog. Thank you Flow Masters! Will be coming back for any plumbing work we need! read more

Quit Carbon ( https://www.quitcarbon.com/) recommended us Flow Masters Plumbing to replace our gas water heater. They installed a heat pump water heater. The team at Flow Master Plumbing is so knowledgeable: they are very familiar with the latest clean-tech solutions and their plumbers did a high quality work. They also helped us with getting our California rebates for switching to electric. Alan and Emmet were always available and very responsive when we had questions. I highly recommend them for new installations. read more

Flow Masters Plumbing - Heat pump water heater - Plumbing Near Me - Daly City, California

I can't say enough good things about the excellent service and follow up that I received from Flow Masters. When I first called, they scheduled a prompt visit to assess an issue with my radiant floor heating system and provided an estimate within the next 2 days. Connor took the time to explain the issue to me and what would be involved in doing the repair. I felt that the estimate was fair and reasonable. Two technicians came out to do the work at the scheduled time and explained all of the steps, even taking photos to show me where the problem was and how they fixed it. They were able to answer all of my questions. Despite testing my radiant floor heating system, for some reason I did not have heat the evening after their visit. I called the next day and they sent someone out that afternoon to investigate and solve that issue. The next week, I found a pool of water leaking out from my laundry room. It was already after 5 pm but Connor came over to assess the problem. He spent over an hour tracking down what was going on and identified an issue inside one of the laundry room walls. He stabilized the issue and arranged to have one of his technicians come out the next day to do the repair. What I can't get over is how responsive and informative Connor and all of his technicians were. That Connor came out after hours and sent a technician the very next day is incredible service. The receptionist was also helpful and responsive. I will definitely be using Flow Master Plumbing in the future and highly recommend them. read more

Allen and Conor are so helpful. I haven't had this company install anything yet but there have been a couple times when I have needed plumbing advice and they have arrived in a pinch and helped me out. I would definitely recommend them for plumbing needs. They show up when they say they will, issue spot and provide a game plan and I feel they are honest in their recommendations. I also appreciate they aren't about the "I think" and "probably" and "maybe" - I am so tired of wishy washy answers from the trades; I appreciated that when Conor wasn't certain about a detail with my tankless HWH, he called the manufacturer's tech support on the spot to verify that his thinking was correct. read more

I was looking for a local expert in radiant heating systems to help me understand the system in my house, identify changes to the system that would enable it work better, and to help me maintain my system on an ongoing basis. Alan (one of the owners) evaluated my system, identified the need for a simpler, more reliable thermostat than was currently installed, explained to me how my system works so I could better troubleshoot future problems, and set me up for ongoing routine maintenance. I am very impressed by their knowledge and experience with radiant heat and the overall professionalism of the whole company. This is a very impressive business, and I am happy to have found them. read more

Alan and his team are genuine, detail oriented, and do high quality work. We had a heat pump water heater installed and they were very responsive and hard working when we needed some follow ups. They were respectful to people in the building and very knowledgeable about permits, tax credits, and converting from gas to electric appliances. We will certainly be using them again for any plumbing needs. Could not recommend more, all 5 stars are well deserved. read more

Connor from Flow Masters has saved me twice from a dying home heat system in cold conditions so far this fall and winter. Both times, he went out of his way to secure parts on short notice. In fact, I'm writing this on Christmas Eve, when he came out at 8am to fix my boiler which died two days ago, leaving my home frigid (okay, by SF standards, but still!). Beyond his skill, he's just super nice and easy to work with. 110% recommend. read more

Our hot water heater died and Flow Masters did a fantastic job replacing it with a heat pump water heater! From beginning to end, dealing with them was a pleasure. We are very happy with the results and look forward to having them maintain the unit going forward. read more

Had a disappointing experience when we were having a minor emergency being without hot water for over a week. Their technician arrived on time he seemed knowledgeable and professional, but then it felt like whether he knew it or not he played a classic sales game, trying to leverage our emergency for a much bigger deal, instead of just doing the minimum to fix our problem. They ended up quoting us about $2k to fix our hot water heater, which we were able to fix with somebody else for around $60 in parts + 1hr of labor. Broke our trust. read more

I got a water valve monitor installed by Flow Masters Plumbing. The experience was seamless and easy from getting a quote through to installation. Juan, our technician, was knowledgeable, speedy and patient. He installed the device within the estimated time and stayed to make sure my app successfully connected with device. Great experience all around. Would seek them out for future water and plumbing needs! read more

Pipe under kitchen sink sprung a leak on the Tuesday before Thanksgiving around 5:30 pm. Called a plumber we'd used before; they answered but kept hanging up on me. Then I remembered Flow Masters, which had serviced our condo before as well. Connor answered right away, was his usual cheery and friendly self, and arranged for us to be serviced the next morning at 8 am. Willie arrived on time the next morning, was friendly and efficient, and took care of another minor issue for us (no extra charge). We've used many plumbers in S.F. over the years, with spotty results. Flow Masters is our top choice from now on! read more

Very professional technician came out during the expected time slot. He took care of our problem with our faucet exactly as we hoped, and was super open to me watching. He answered all my questions and was very personable and patient. Not the cheapest option I saw, but it was worth it to me to have it taken care of professionally and correctly. read more

I called Flow Masters to replace a roof drain and overflow. I spoke to so many plumbers who said it was a roof drain and vent pipe. Juan took one look at the photo of the rusted roof drain combination and immediately recognized what I needed and sent me a photo of the correct part. They were able to start the work very quickly, and coordinated with our roofers. Fergal and Juan were prompt, very communicative, and did an excellent job. I highly recommend Flow Masters. read more

They always have our back, whatever time the plumbing gremlins strike. Juan Garcia came today and worked for a few hours to find the clog and dislodge it. Thank you Flow Masters! read more

I intially hired Flow Master's to unclog a bathroom toilet. Their equipment became stuck in the pipes and after much effort and a gigantic mess they were able to unclog the pipes. However in the process they cracked the interior of my toilet. The owner was called and he came to view the damage and quickly agreed to buy a new toilet for me and a few weeks later he had his crew come back and install the new toilet. However the crew did not properly tighten the coupler to the waste pipe when they installed the new toilet. So each time the toilet was flushed it flushed waste water into the walls of my home and under the wood floors of the bedroom which was behind the toilet. The bedroom wood floors buckled from being soaked in waste water. The odor was horrible. The owner came back and opened the wall and saw their plumbing error. He took responsibilty again and filed a claim with his insurance company. This was in August of 2024. I had to immediately mitigate the water damage and to begin the repairs in my home. I had to pay for all of these repairs out of my own pocket which were very expensive. I could not use my bathroom or bedroom for months. It took five months for plumbers insurance company to just partially reimburse me for for repairs. While I appreciate Flo Masters taking responsibility for the damages I would not use them again or recommend them because the damages they caused in my home were easily preventable if they had done their work with care and diligence in the first place. read more

Had a backed up sink with leak and Juan was able to fix it no problem. Communication was clear on pricing and he explained everything that was wrong. He also noticed another issue with moisture behind the sink that I need to follow up on to prevent mold. This is my second job from Flow Masters and they are definitely one of the best in the Bay Area! read more

My tankless water heater stopped working and I contacted the manufacturer and they referred me to Conor at Flow Masters. Conor came out to assess my situation and had Alberto scheduled to come and service my tankless water heater the very next morning. Alberto did an amazing job. He diagnosed the problems both with the tankless water heater and the exhaust and fixed everything that day. I'm super grateful and appreciate Alberto's work and Conor for making this happen. read more

30+ years as a homeowner I've seen a lot of plumbers, but Flow masters is the best plumbing company I have ever worked with. Whenever I call even after hours, someone would pick up their response time was quick and they would've done the repair work the next day, but they had to order the part, best of all they're their estimate was so reasonable. Call them now! read more

One of our hydronic radiant heating zones stopped working. Flow Masters Plumbing was highly recommended by Pace Plumbing Supplies, which was where our original plumber bought our radiant heating system. Pace also provided some install consultation to our original plumber. Connor, who serviced our radiant heat system, was very friendly, professional and showed up with a mask on (for Covid prevention). He found the problem very quickly, addressed it and also took a quick inspection of the system to make sure everything looked good including sending a scope into the embedded pipe to make sure hot/warm water is being distributed throughout the zone. It's nice to have our heat back! We're very happy with the service provided and will definitely contact them again for future service needs. read more

We hired Flow Masters to do annual maintenance and also install a seismic shut off valve on our gas line. Connor and Beto did a great job!

With backup in our sink and poor drainage out of our washer I knew we had a problem. I called Flow Masters in the morning and they arrived in the afternoon - thank goodness! It took several attempts to track the backup point but they found a huge problem with pipe connections that had stopped the flow of toilet paper. They corrected the connections & increased the pipe diameter and we're good to go! The team was professional, polite, kept us informed and were really tidy. I highly recommend Flow Masters. read more

My radiant heat system had some zones that were not working and they replaced some valves of some sort. What a relief ! Finally we have heat all the way through the house.. my kids are super happy! They also did a maintenance on my boiler and said I should really be done once a year. Seemed like a good crew. I'm planning to get them back every year now to service my system. read more