Thank you in advance for your help and guidance, I really appreciate it! I have a question regarding whether or not I need to install a second check valve in my PVC plumbing.
As you can see in my current setup, I have a check valve that is sitting in front of the discharge pipe from the heater. Last year I had a pool company install the diverter which will bypass the heater. (I had copper in my water and thought it was from the heater, so I had replaced the heater and install the bypass). When they installed it, they did not say I needed a second check valve.
This year I am installing a salt water chlorinator cell right where the current chlorinator is. After looking at the plumbing, if the heater is bypassed, there is no check valve between the chlorinator and the pump/filter. There is, however, a long vertical PVC pipe going up.
I already bought a second check valve, but my concern is that it may add too much back pressure on the system. I currently have a 1HP hayward super pump and it's roughly a 75 foot run to the pool.
My question is. Do I need to even have a second check valve BEFORE the chlorinator right next to the vertical pipe? If so, will this put too much extra "strain" on my pump with the added back pressure?
Thank you again for taking the time, I appreciate it!