Trojan Boat Forum

Hello everyone . On f25 has anyone replaced fuel check or non return valve ? if so do you know how to size em as having difficult time finding one to fit .Basicly would like to stop gas from draining back to tank after sitting for cpl weeks

I think what you're looking for is an anti-siphon valve. Used primarily as a safety device to prevent siphoning should the fuel system develope a leak anywhere after the tank but will do the same thing you're enquiring about. Looks like you may have a 3/8" line.