Discussion Starter · #1 ·
I just installed a tankless Rheem water heater 11 gpm. I have not yet plumbed the return for the recirc. I get not only cold water sandwich, but the hot water fluctuates in the shower (probably because someone turns on a sink.) I am considering installing a 6 gal. tank downstream to buffer out fluctuations. If I install it in series, the tankless will feed into the tank, and the tank will rarely have to heat, and I will get the buffer I need to eliminate fluctuations. If I install in parallel, I might get increased flow because the tank will have a higher flow rate. Which is best? And if I install in parallel, will a flow control on the tank outlet be an option to maximizing the performance?