dedicated recirculation line

  1. J

    Thermal expansion - check valve

    Hello, Our new house has a hot water dedicated recirculation system that was installed with only a single check valve, a Euroblock spring check valve that is supposed to prevent the hot water from backflowing into the cold inlet to the water tank/heater. (Not the purpose of this post, but...
  2. Monguila

    GPM for dedicated recirculation line.

    Good day everyone. I read somewhere that the GPM on a dedicated 3/4" return line should not exceed 1 GPM. Is there any validity to that statement? My return line is at 4.7 GPM. The total length of the line is +- 120 linear feet, connected to NPE210A. 80% of it is a straight shot along the...
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