EmilysDad
Senior Member
Sorry. No idea where it is (assuming 1 is fitted ... there usually is ...) to your car, but it won't be far away from the pump itself. They're only fitted to prevent screen wash from draining back into the bottle between washes.Hmmm, now i`m concerned it may be that and i just spent £75 on new jets!!!! Where is the none return valve so i can check? Also, just bought some merc screenwash and want to know if i can use de-ionized water or does it need to be distilled? Don`t want to use the expensive crap that comes out of the tap though......