So I have a pair of 3/4inch wye check valves installed on my return lines. And while fluid testing my new tank I noticed that I get some chatter from them if I have my pump (varios 6) set to 3 or above. It's not consistent, just sometimes. On setting 4 it's only very intermittent ( very faint noise, and very brief) level 3 is more frequent. Is this normal?
Thanks
Thanks