Fresh Water Check Valves

[jwvicker]

Hello all! Plumbing my fresh water system and have a quick question on check valves. I will install a check valve after my pressurized freshwater (campground) hook-up. Should there also be one installed after my tank water pump and accumulator, before I 'T' into the pressurized (campground) line? If I do not do this, is there a chance the pressurized (campground) line could feed back through the water pump and into my tank?

Sorry if this is a novice plumbing question.

Thanks!

[ol trunt]

The chance is there and is avoidable simply by the use of a second valve. For me, at least, remembering to set the valves seems to be the tough part.
Jack

[Danjo]

I also have two valves and two check valves just valves. Belt and suspenders!

[jwvicker]

Thanks - yes, makes sense to me too.