Check valve in the return....good or bad idea?

[ichthyoid]

It was already on the system.

I converted part of the system to the loop later on.

 

[jmaneyapanda]

ichthyoid;863385 wrote: It was already on the system.

I converted part of the system to the loop later on.

Ah. Grandfathered in.

 

[grouper therapy]

ichthyoid;863350 wrote: I ran a check valve on my 150 closed loop. It never failed, but I didn't exactly have peace over it either.

Given the options, I doubt I'll have another.

Overflow with redundancy built in for me (2 drains, one return).

really!!! I would have 100% complete confidence with one on a closed loop