My Ec 50 is brand new and when using the skimmer everything works just fine , but when I hook up the vacuum hose the filter will run for about a minute at 10 lbs pressure then drop to nothing (0). My vacuum hose is also new and I was having the same problem on my old fillter which still runs but is 15 years old
Garden - Hayward - EC50C Perflex Filter w/ 1.5HP Pump and Timer
Answers & Comments
You have air infiltrating the vacuum line somewhere. The hose may have a swivel cuff on one end that must be in the water, not attached to the skimmer. Next, check the gasket on to p of the pump housing. Under vacuum, the gasket may bleed air into the system shutting down the pump flow. Lastly, check the skimmer thoroughly for small cracks. Again, under vacuum it may open and allow air to infiltrate. The only way for a filter to go from 10-0 pressure is if the pump loses prime ie: air infiltration. Hope that helps.. Rob