One way valve on intake line of deck wash pump

[LifesBetterWhenYoureBeating]

Hi everyone,

One of my boat's PO installed a jabsco par max 4.0 pump to use as a deck wash, connected to a water tank">fresh water tank. On the intake line there's a one way valve but I don't understand what I gain by having it there. Does anybody have any idea?

Thanks in advance!

[Calif.Ted]

I'd imagine it is to prevent any backflow into your freshwater tank to possibly contaminate drinking water.

[Cheechako]

Maybe the hose would back flow when not in use and he didn't want to have to fill the hose every time he used the pump? I would think the pump would prevent that though...

[LifesBetterWhenYoureBeating]

Thanks, guys. That was my best guess as well. As I've changed the intake line to raw water, I'm removing the one way valve