I just recd my jandy chk valves from UPS. Was so happy to see everything I need to finish my plumbing tomorrow. First thing I read on the instruction manual is "This check valve is not designed for use with air blowers".
That's exactly what I just purchased them for. I have two stub outs at my spa. One for lower leg jets and one for back jets. I got advice to plumb check valves as close to the spa as possible to prevent water backup in the air line. Explanation was that you wanted as little water up the line as possible so the blower didn't have to work OT to push it out. I have plans to put a hartford loop just a few feet away from spa, but was told that chk valves would still be worth it.
I decided to get the "better" chk valves ... but now i see this "don't user for air blower comment.
If I can't use these really good check valves, then what can i use!?