1audio
New Member
I installed one of these and its a well done kit. However I have questions about integration with a recirculation system. The directions say to connect the recirculation to the tap on the thermostatic valve. Its currently going in to the water heater drain connection. I need to service it because the flow is to low so the whole system fills with untempered water at around 140 when it runs. Makes for a bit of a surprise when a tap is first turned on. The datasheet says I need 1/2 GPM for the valve to work. I will be opening it up and replacing some components that are probably 60 years old (steel pipes and backflow preventor). The pump is a recent Grundfos UP 15-42 SF that per their docs should deliver 3.5 GPM. Clearly its not.
So if I redo this and redirect the recirc. to the mixing valve I have the following questions-
1) Location for air bleed valve? The connection to the mixer valve will be the highest point. Do I move the air bleed up there?
2) Redirect the pump. Its pushing water down and this would redirect the flow up up. I don't think it matters but I don't want to do something dumb.
3) Backflow preventer- vertical instead of horizontal- any issue?
4) Components- The piping except for this stuff is all copper. Should I use brass or steel + dielectric for this stuff?
So if I redo this and redirect the recirc. to the mixing valve I have the following questions-
1) Location for air bleed valve? The connection to the mixer valve will be the highest point. Do I move the air bleed up there?
2) Redirect the pump. Its pushing water down and this would redirect the flow up up. I don't think it matters but I don't want to do something dumb.
3) Backflow preventer- vertical instead of horizontal- any issue?
4) Components- The piping except for this stuff is all copper. Should I use brass or steel + dielectric for this stuff?