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Watts Premier

Watts Heat H2O 0955805 Hot Water Recirculation System Programmable Timer

  • Based on 285 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Oct 22
Order within 8 hours and 54 minutes
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Size: Pump + 3 Yr Warranty


Features

  • INSTANT HOT WATER: The Watts Hot Water Recirculation System utilizes thermal bypass technology to instantly supply hot water in seconds at every faucet or shower when needed. The sensor valve opens when the water on the hot water side cools, pushes the cool water back to the water heater, and closes when the hot water line reaches 98 degreesF. . Not designed for tankless water heaters.
  • EASY DIY INSTALLATION: Operating on 120V, this quiet, efficient system easily installs into existing plumbing without the need for a return line or additional electricity under the sink, and once installed requires no maintenance. Includes everything you need for installation: heavy-duty stainless steel pump head in aluminum housing, 10 ft cord, 2 adapters with rubber washers, valve mounting screws, and two 12-inch supply lines.
  • WATER CONSERVATION: Your days of wasting time and water are over. With hot water available in just 15 seconds, this convenient system can lead to significant water bill savings, including saving up to 15,000 gallons of water every year.
  • CUSTOMIZABLE OPERATION: This pump includes a convenient built-in programmable timer that can be set to run for 24 hours a day or to activate only during peak use times. Its 24-hour dial features quarter-hour division tabs and AM/PM indications so you can easily set operation of the circulator according to your household's water usage patterns.
  • IMPORTANT INSTALLATION NOTE: The recirculation pump installs near the water heater, while the sensor valve installs under the sink. This kit includes all of the components needed for the under-sink installation (two flexible hoses, sensor valve, mounting screws). To install the pump, additional tools are required for water heaters with rigid, non-movable water supply pipes. Water heaters with a flexible water supply line allow for simple DIY installation; no additional tools are needed. A flexible water heater supply line is not included with this kit. Please review the how-to guide for complete installation instructions.

Description

Never wait for hot water again. The Watts Heat H2O Hot Water Recirculation System utilizes thermal bypass technology to provide hot water to your faucet or shower instantly. The device uses the pump at the water heater and a patented under-sink, thermostatically controlled sensor valve to create a pressure differential, allowing cool and cold water to bypass into the cold water supply line at a low volume and keeping the water in the hot water supply line at a no-wait temperature throughout your entire home. Easily installed into existing plumbing without the need for a return line or additional electricity under the sink, this quiet, efficient system requires no maintenance once installed and includes everything you need for quick DIY installation: pump with 10 ft cord, 2 adapters with rubber washers, sensor valve, mounting screws, and two 12-inch supply lines. With Watts Heat H2O Hot Water Recirculation System, your days of wasting time, water, and money are over. Readily available hot water means no need to let the tap run while waiting for it to heat up, which leads to significant water and money savings: up to 12,000 gallons per year and up to 10% off your water bill! This pump also includes a convenient built-in programmable timer that can be set to run for 24 hours a day or to activate only during peak use times. Its 24-hour dial features quarter-hour division tabs and AM/PM indications so you can easily set operation of the circulator according to your household's water usage patterns. Not designed for tankless water heaters. For indoor use only.

Power Source: Corded Plug


Flow Rate: 3.4 gpm


Voltage: 120 volts


Material Type: Aluminum, Stainless Steel


Item Highlight: Thermal Bypass 120 Volts Return Line Not Needed 3-Year Warranty Includes Pump Sensor Valve 2 Supply Lines Easy Install


Color: 7.8 Inches X 7.8 Inches X 8.3 Inches Device + Equipment


Product Style: Pump + 3 Yr Warranty


Item Dimensions L x W x H: 8.3"L x 7.8"W x 7.8"H


Item Weight: 3 kg


Brand Name: Watts Premier


Model Number: Q419


Global Trade Identification Number: 00098268557169


Number of Packs: 1


Manufacturer: Watts


Number of Items: 1


UPC: 098268557169


Unit Count: 1 Count


Specific Uses For Product: Floor


Included Components: Pump, sensor valve, fittings.


Item Type Name: Hot Water Recirculation System


Manufacturer Part Number: 0955805


Best Sellers Rank: #24,918 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #50 in Water Heaters & Parts


ASIN: B0D4NTC59R


Customer Reviews: 4.5 out of 5 stars (285)


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Gets the Job done
Size: Pump + 3 Yr Warranty
This is my second Watts Hot Water Recirculation Pump. The last one lasted over 10 years!! So, I got another one as it is a solid pump and easy to setup. I did have to run a plug next to the Heater in the garage but not a problem. Installation is quick and after timer setup, it starts heating the water within less than 30 minutes. Highly recommend the Watts Hot Water Recirculation Pump. Worth every penny. It will save money in pre heating your water. ... show more
Reviewed in the United States on September 22, 2026 by Support is Beautiful
    • What are you waiting for?
Size: Pump + 3 Yr Warranty
Three years ago we moved from a house that we custom built which included a recirc pump that provided hot water to all of our sinks within 5 seconds. It was nice to have that feature that we quickly took for granted. Although we didn't have to pay for water, as we were on a well, no one likes to waste water. Our current home was not built with a recirc system and although we are no longer on a well, we do have to pay for water and we try to conserve as much as possible. But we would have to start the shower and let it run for up to a minute until the hot water would finally start flowing. And that was the case in every sink and tub in the house. Our prior home's plumbing was built with a dedicated hot water return line loop, so I was skeptical of a recirc pump that supposedly worked with the existing piping without this extra line. But out of three years of frustration with our current situation we decided to buy this Watts recirc pump and give it a try. We have two hot water tanks so I installed it on the outlet of the second tank as instructed and installed the sensor valve that came with it under the bathroom sink the furthest away from the hot water tanks. It took me about two hours to install and get this pump and sensor unit operational from the time I shut off the hot water and drained a couple gallons of water off of the second tank until it was installed and operating. But it was two hours well spent as we now have hot water within 5 seconds throughout the house! Anyone with a basic understanding of plumbing can install this. The instructions are very concise and they provide everything you need except for a wrench and pipe thread tape. But if plumbing is not your thing, then buy this and have it installed. No more waiting and waiting and wasting water while the hot water finally makes it way through your home's piping until it finally gets to your sink, tub or shower. The pump itself is well-built and so quiet you can't hear it if you are standing next to it. You have to grab the outgoing water line and feel it to know the pump is running. And if you don't believe me, there are a whole lot of other great reviews out there that say the same thing. Personally, I am kicking myself as I should have done this 3 years ago. ... show more
Reviewed in the United States on May 22, 2025 by Amazon Customer
    • Instant Hot Water and Easy DIY Install – Great Product!
Size: Pump + 3 Yr Warranty
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! ... show more
Reviewed in the United States on March 28, 2025 by Tayler
    • EASY INSTALL
Size: Pump + 3 Yr Warranty
Eliminated all the cold water sitting in the long run of HOT pipe !!!
Reviewed in the United States on September 17, 2026 by Psychojoe
    • The house finally feels like it forgives us for its bad plumbing decisions...
Size: Pump + 3 Yr Warranty
I stumbled across this recirculation system while researching on-demand heaters and under-sink hot water tanks. Both options were expensive and would have only solved the issue for our master bath. This, by contrast, cost far less and ended up improving water access throughout the entire house. For reference, we live in a 3,000-square-foot home at 7,000 feet in the mountains, where cold water is not just cold — it’s glacial. For years, turning on the shower in our master bath meant starting a timer, brushing our teeth, and maybe rotating the laundry. Hot water took nearly three minutes to arrive, drifting in like it was pondering whether we deserved it. The sink wasn’t much better. We installed this recirculation pump expecting a small improvement. Instead, we got hot water in ten seconds flat. The sink responds in five. It changed the pace of our mornings in a way we didn't know we needed. Simply put, the thing is magic. But here’s the unexpected part: we use a TUSHY bidet. Which, until now, had the personality of an arctic slap. Because this system nudges a bit of warm water into the cold line, even that has become… civilized. Warm. Almost luxurious. It’s absurd how much that tiny shift improves the experience. Between the water savings (roughly 3,000 gallons a year, by our count), the comfort upgrade, and the sheer relief of not waiting around for plumbing to make up its mind, this might be the best house upgrade we’ve made. I wish we’d done it ten years ago. ... show more
Reviewed in the United States on June 4, 2025 by Continentaldrift
    • Easy DIY Install & Instant Hot Water, with a Small Trade-off
Size: Pump + 3 Yr Warranty
I installed the Watts Heat H2O system on my boiler, and the valve on the farthest sink in my house. It delivers hot water within a minute of the pump running. Installation was straightforward, with no need for a power outlet under the sink. It runs very quietly—barely noticeable—and can be made smart using a smart plug and buttons. A few trade-offs: the return line carries hot water, which may introduce boiler-related minerals into the cold line. Also, the pump itself runs hot (likely due to constant exposure to hot water), which means some heat loss to the surroundings. Still, it’s a well-designed and efficient solution for instant hot water. ... show more
Reviewed in the United States on June 24, 2025 by Shubh
    • Save water and sewer charges!
Size: Pump + 3 Yr Warranty
Totally works as advertised. Plumber confirmed it was quality. Saves water. The facuet furthest from the tank has hot water within seconds. Set on continuous- no noticeable difference in electric bill.
Reviewed in the United States on July 30, 2026 by ed
    • Didn't work for me
Size: Pump + 3 Yr Warranty
Mine won't stop pumping hot water into the cold lines. The valve sensor appears to be working because I turn off the cold supply and turn the cold faucet on and get no water running which means the valve is closed yet the hot water continues to be pumped. Doing this even for the minimum 15 minutes tab timer thingy is too much hot water in all my cold lines and a waste of natural gas (required to heat my water). But now removing this and sending back to Amazon is work and I fear a new one will behave the same way so am inclined not to even bother returning it :-( ... show more
Reviewed in the United States on March 11, 2026 by Paulo

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