Multiple Recirculation Pumps for Domestic Hot Water Use
Multiple Recirculation Pumps for Domestic Hot Water Use
(OP)
Hello all,
I'm looking for any advice/comments on using multiple hot water recirculation pumps for domestic hot water systems. The intent is to use two pumps (one for each extended recirc main serving the farthest fixture at opposite wings) back to the cold water main tying to the hot water heaters (in my case, a total of 3). The concern I have is the overall performance of the recirc system when using multiple pumps (ie: will they be potentially fighting one another). I am curious if anyone out there used them in their design of the hot water recirc system.
Thanks,
I'm looking for any advice/comments on using multiple hot water recirculation pumps for domestic hot water systems. The intent is to use two pumps (one for each extended recirc main serving the farthest fixture at opposite wings) back to the cold water main tying to the hot water heaters (in my case, a total of 3). The concern I have is the overall performance of the recirc system when using multiple pumps (ie: will they be potentially fighting one another). I am curious if anyone out there used them in their design of the hot water recirc system.
Thanks,





RE: Multiple Recirculation Pumps for Domestic Hot Water Use
I don't think I've seen the hot water return directed to the cold water main, which I'd guess would eventually get you warm water in the cold water system.
How about returning the hot water loop to the top of the hot water tank?
No expertise claimed here.
Mike Halloran
Pembroke Pines, FL, USA
RE: Multiple Recirculation Pumps for Domestic Hot Water Use
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Multiple Recirculation Pumps for Domestic Hot Water Use
In a multiple pump situation, one of the pumps is going to be nearly identical to the pump in the single pump situation, so the second pump is mostly redundant. Other than the balancing valves and maybe a little bit of piping, the single pump system will be less expensive.