georgekessel
New Member
Hi,
My question is, is there way to have both a dedicated hot water loop AND use a thermal bypass valve? I'll explain:
My not-so-great contractor built my brand new house with a dedicated hot water return loop (on a Rinnai RUR) that only covers one area of the home. Then the hot water branches off from there and goes about 40ft underground sunk-in-concrete to the kitchen sink with no dedicated return.
The kitchen sink therefore takes 2 1/2 - 5 minutes to get hot water. We can't add a return loop to the kitchen because it's an open wall-less area, and the lines have all been sunk in concrete at the floor for this reason.
I tried adding a thermal bypass valve to the kitchen sink. On it's own with no changes to the Rinnai (keeping it set in programming as a dedicated loop), that reduced hot water wait times by about 40% in the kitchen.
I tried then adding the filter (instead of the plug) and setting the Rinnai for a thermal bypass valve. That gave quick hot water to the kitchen BUT the sinks that were fed by the loop suddenly had hot water in the cold water lines (not just warm, truly hot water).
If need be I can replace the Rinnai with a different system, my goal is to have reasonably fast hot water at both the sinks fed by the loop, and the kitchen sink.
Please help and thank you!
My question is, is there way to have both a dedicated hot water loop AND use a thermal bypass valve? I'll explain:
My not-so-great contractor built my brand new house with a dedicated hot water return loop (on a Rinnai RUR) that only covers one area of the home. Then the hot water branches off from there and goes about 40ft underground sunk-in-concrete to the kitchen sink with no dedicated return.
The kitchen sink therefore takes 2 1/2 - 5 minutes to get hot water. We can't add a return loop to the kitchen because it's an open wall-less area, and the lines have all been sunk in concrete at the floor for this reason.
I tried adding a thermal bypass valve to the kitchen sink. On it's own with no changes to the Rinnai (keeping it set in programming as a dedicated loop), that reduced hot water wait times by about 40% in the kitchen.
I tried then adding the filter (instead of the plug) and setting the Rinnai for a thermal bypass valve. That gave quick hot water to the kitchen BUT the sinks that were fed by the loop suddenly had hot water in the cold water lines (not just warm, truly hot water).
If need be I can replace the Rinnai with a different system, my goal is to have reasonably fast hot water at both the sinks fed by the loop, and the kitchen sink.
Please help and thank you!
