connector. 請教
Why is circulation Pump at the 2nd heater water (two connected in series)?
I googeld. For quick fill of hot tub on 2nd floor?
A plumbing guy at Home depot told me shark bit connectors are not code compliant behind walls (what ever that means?). Per him I need to use plumb clamp/ring ($100 for clamp tool).
Per google, it is good.