G
Guest
My elevated spa is draining back into my pool. It appears to be happening through the return jets. I was told to install a check valve so I am going to DIY it. I could use some expert advice on the best location for it and attached the photo. I read that Jandy check valves prefer a 18" column on water behind the valve, but I don't have that in my plumbing. Would vertical placement be best for my setup?