I have a Hayward EC-40 DE filter with a 1 HP Hayward Perflex pump and everything has been working fine. I have been running into a problem with an air leak whenever I use my Aqua Bug pool cleaner. Whenever I use the cleaner I get a ton of air in the pump strainer basket. If I remove the cleaner and and turn the pump back on it reprimes fine. I just replaced the o-ring on the strainer basket cover and lubed it with Jack's 327 multilube as recommended by the manufacturer and it didn't help at all. Additionally, I have tried removing the leaf canister in case that might have been the problem. Today I tried to sink each of the connections in the hose a few at a time to see if maybe it was one of the connections that's leaking, but I did not have any luck with this either?
My only thoughts are to replace the hose to see if that is the problem or I wonder if it could be the seal on the pump shaft? Not sure if that makes sense, but thinking that the restriction/head load that the vacuum adds might cause a seal that's on its way out to leak? I don't even know if that makes any sense, but I'm stumped. Seems that the hose costs almost as much (more some places) as an entire new unit ($105 on Amazon with free shipping?) Anyone have any experience with a similar problem? Any ideas would be greatly appreciated.