|
Pretty sure the check valves are there in the nozzles to prevent the nozzles from sucking in air or other nasty things. They also keep fluid in the hose, so the pump doesn't have to work as hard. Also, with no check valve, your driver side nozzle will start squirting long before your passenger side does, and the two will not have the same flow. Much less fluid will reach the passenger side.
I only know this because there was a similar system set up on my old CJ 7, and I was broke and couldn't afford two check valves, so I didn't use either. I got the above-described behavior for my troubles.
|