2024 Updated Watts Heat H2O Hot Water Recirculation System

I just installed this after buying in September 2025. It took me about an hour to get it fully installed. It runs silent and works very well. I was able to get hot water at most area's of my home in under 5-seconds. Considering getting an additional "sensor" valve to speed up one other section. I was worried about cost of electricity overtime but I used an AI agent and it resolved the math for me. Average cost was $1 to $3 monthly in eletricity based on response. I thought it would be significantly more to run continuously. One note, instructions mention to use pipe dope on the hose connection going to house from pump (but not tank to pump). I think thats easy to overlook. I had to go back and redo it as I initially overlooked.

I was really impressed with the Watts Heat H2O Hot Water Recirculation System. It’s a great product that does exactly what it claims—delivers hot water almost instantly without wasting time or water. The biggest highlight for me was how easy it was to install. I’m not a plumber by any means, but the instructions were clear and all the parts were included. I had it up and running in about an hour using basic tools. The programmable timer is a great feature. I set it to run during the times we usually need hot water, and it works flawlessly. Our bedroom shower is on the opposite end of the house from the water heater, and we used to wait forever for hot water. Now, the wait time has been cut by more than half—it makes a big difference in our morning routine. The included sensor valve and adapters made the whole process smooth. It’s also quiet when it runs, which was a nice surprise. Plus, the 3-year warranty gave me peace of mind. Overall, this system is a smart investment if you're tired of waiting for hot water. It’s efficient, easy to install, and adds real convenience. Highly recommended!

After years of waiting for water to reach the far areas of my house, I had finally had enough. This pump exceeded my expectations and works flawlessly. It sat on my counter for a few weeks until I finally decided to install it. Installation time was less than 30 min. It took me longer to get the junk out from beneath the far sink than it did to install. The instructions are straight forward and easy to understand. I did the under the sink valve first. They supply you with all the right hoses and connections. I did have to get long hoses, but that is not the fault of the mfg. My supply pipes are further apart. I bought longer hoses and everything was golden. Installing the pump was beyond easy. Yes I did have to buy the correct CPVC fittings with 3/4" threads to connect to the pump. Less than a dollar at the local hardware. Off the discharge pump I went with a flexible hose that connected to my system. You will have to buy a few extra pvc fittings if you need to make it work with your water heater system. It took less than 30 min to install in total and I plugged it in. I could tell it was working, but the pump is extremely quiet. We set the mode to timer, because we want it on from early morning to around 11 pm at night then the timer shuts off the pump. You will still have hot water, but just not as fast as when the pump is working. Even if you let it run all the time, it would cost around $20 a year, tops, but the timer is a nice feature. So far I am extremely happy with the product and it has hot water at our furthest sink within 5 seconds. Don't hesitate to buy this product.

Pump is great at circulating the water during the hours you set it to. It's nice to wake up to having instant hot water, especially in the winter when it would take literally minutes to get hot water to the master bath, which is at the opposite side of the house that the hot water heater resides. However, there are some quirks that people should know about. Pros: Small unit, affordable, does the job as described. Timer is nice, it's analog with pull out tabs/switches, but easy enough to setup. Cons: 1. Most people won't be able to install this themselves. This should go on the hot water heater, and if you have copper pipes that you'll need to cut, and sweat new pipes onto, most people will need a pro. I used shark fittings, but still had to cut, measure, cut to get it right. If you have flexible hoses on top of your hot water heater, then it would be an easy install for you. Under sink install is very straightforward. 2. If you have sensitive hearing, you may hear humming in your walls/pipes as this is running during the set times. I can hear it when I walk by walls that have pipes in them, and it irritates me. So, I don't run it all night. 3. When it runs, some pipes in walls get a "drip" sound. No idea what is causing it, I'm still chasing it down. 4. This is a very minute con: Since it recirculates the water into the cold water pipes, when you initially open your cold spout you might get luke warm water for a few second. Not really a big deal. Overall happy with it as it functions well.

We have been in this house for 6 years and have been frustrated with how long it takes to get the hot water from the tank to the bathroom. We were always washing hands and brushing teeth with very cold water, and running the tub for a long time before any hot water got there. Finally I found out about this product. I wasn’t too enthusiastic about using the cold line as a return. I thought that would result in warm water when we wanted cold. Also I replaced my tank a couple of years ago and the new tank has a heat trap so I read that it would be a problem with the proper operation of this unit. But my research found that worst case was that I could remove the heat trap on the hot side and replace it with a plain nipple so I decided to purchase the unit and try it out. Installation was fairly straight forward although I had to remove a section of copper pipe and solder it back together, but that was a minor task for me. The hardest part of the installation was tightening the fitting onto the outlet side. There is nothing on the pump housing designed to put a wrench on to stop the pump from turning. I had to put a crescent wrench on the housing where it bolts together which had me a bit concerned about cracking the housing. It did turn out ok though. I got it all installed and fired it up. It is quiet, slight hum, but it is located in an unfinished b a segment (cellar really) so unless I go down there I can’t hear it. The great part is that the heat trap has not interfered with the operation at all. I get hot water at the bathroom sink and tub almost immediately. This makes me very happy every time I turn on the tap. I don’t use the timer at all. I installed a smart outlet linked to a phone app so I can shut off the pump whenever I need to (like if we are going away) but so far the pump runs 24/7 since we are home most of the time, and we want hot water at the bathroom even in the middle of the night. One bonus is that I also get hot water sooner at the kitchen which is on a different branch but it tees off about 10 feet after the tank, so its already about ⅓ of the way there. I may upgrade with an additional valve under the kitchen sink but I am thinking that I will be ok with it the way it is for now. It has been about 2 weeks since install and I am very happy with this pump system.

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This is a quality product with good seals and instructions making for an easy installation. Instead of the built-in timer, I'm using a smart timer controlled by my phone.

I love this pump. It works great.

The pump and temperature bypass valve have been installed for approximately 1 week and so far so good. I had a concern that the cold water line would be too warm with the hot water bypassing into it to maintain hot water lime temp but not too bad. The cold water from the faucet at the bypass valve sink is at about room temperature. It is a trade off to have room temp cold water instead of icy cold-cold water at the tap since I didn't have to plumb in a return line. I did install a downstream ball valve so the HWH & pump can be isolated if anything requires service in the future The pump has been running 24/7 as I have yet to program the timer so not sure how that is going to work.