Thermal Bypass Sensor Valve – Compatible with watts 500800, 500805, grundfos UP Comfort & Most Hot Water Recirculating Pumps – 304 SS, Includes 2 x 12" Hoses – 3-Yr Warranty

great replacement for my grundfos that stopped working

So far working just like the Watts pump I had previously however, I don't like the military time dial and the fact that it was missing the connector slip nut to the water heater connection. I had to make one. Other than that, seems to work fine.

Installed this to cut down on the time (and water) wasted waiting for the shower or sink to heat up in the mornings. It’s made a noticeable difference, hot water reaches the tap much faster now. The installation process was straightforward.The kit came with everything needed, and the instructions were easy to follow, even without plumbing experience.The pump is quiet when it’s running, and the built-in timer gives you control over when the system is active, which helps avoid unnecessary energy use. I like that you can set it for peak usage times to make it more efficient. The build quality is sturdy and the valve responds accurately to temperature shifts. Overall, it’s a useful addition if you’re looking to streamline water usage and reduce wait time.

I’ve always wondered why Watts and Grundfos thermal bypass valves were plastic, so this metal one is a nice alternative. It’s rated to close the valve at 104°F, while Watts and Grundfos valves close at 95°F. That means it stays open longer, allowing more hot water into the cold line—good for keeping hot water ready but could lead to more mixing. Kind of a trade-off depending on what you prefer! It does come with the lines and hardware, so all you need is a crescent wrench to install it, which is a nice touch.

Comes with a lot of parts and adaptors.

I have a bathroom that was added on to my house. It has its own plumbing run from the center of the house, about 50 feet away. It would always take a full 1 minute to get hot water to the sinks! I have been considering options to improve that for the last 8 years, from a point of use water heater to circulating pumps. This little device is supposed to help by trickling a little hot water into the cold line to keep the hot line moving a little.Installation was easy, but I had to buy 4 new hoses for half the price of the device alone. I was worried about it being plastic, but it is a fiberglass reinforced plastic which helps with durability. As long as the faucet is being used regularly, the hot water does arrive quicker. But I have two faucets in my bathroom so if the other one is used the device doesn't do its thing. I'm not completely thinking this is the solution I need, but it's the least expensive option and worth trying out for a while.

This hot water recirculating pump works well. It cuts way down on the time required to get hot water running through the faucet in the morning.

I have several of this style thermal bypass valves I the house. Some are big name valves, some are second name. This ‘Frutlait OEM 595926 Replacement Comfort Valve Thermal Bypass Valve for Hot Water Recirculating’ works as well as any other valve in the system.That’s good enough for me. It’s an OK value, a little pricy for what it is. For a few dollars more, you can order all stainless steel.