How many bypass valves do I need for a Grundfos hot water recirculating system?
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I am considering purchasing and installing the Grundfos hot water recirculating system. I have a two-story house with a 50 gal water heater located in the basement. There are two bathrooms on the upper story, and a kitchen and bathroom on the main level. Do I need to install bypass valves in all four locations or just the bathrooms on the upper floor?
I recently installed this type of pump as part of a green remodel/addition to a one-story home in Winter Park, FL.
We created a split plan, by adding a master suite to the far side of the home (furthest from the existing baths). This resulted in a long wait time for hot water and the hot water recirculating pump resolved the issue.
I would say that the answer to your question depends on how your plumbing trunk lines were run, but it should be as simple as installing the valve at the furthest location from the water heater. This way, hot water will run through the trunk lines anytime the pump is activated -- running past each of the closer locations and resulting in short wait times for hot water anywhere. You will also not waste any water during the wait.
I hope this helps.