[JettaRed]

I've had a couple of times when really small stuff that may be in the bottom of my washer tank gets sucked up and passed through the pump. Then it gets caught in the check valve, causing vacuum leak symptoms. Here is my solution. It's a Purolator fuel filter (part no. F20011) installed on the intake side of the pump. The 1/4" lines fit snuggly inside the barbs of the filter. It will also act to catch any air in the line, though I haven't had any problem like that.