Strange Part in a Strange Place
A few days ago our hot water just quit flowing from all faucets in our Itasca Class C motorhome. The cold water flow was just fine and the water pump sounded normal. After scratching my head over ...
Forum Discussion
Water flow is 'out' of WH tank-----pressure pushes against back of plastic plunger disc (where stem is attached) opening disc against spring pressure.
No water flow------spring pressure pushes plastic plunger closed and o-ring seals. (Spring is compressed when disc is forced open)
Back flow is prevented because water pressure pushes against 'flat' head of plastic plunger disc which is being held closed via spring pressure and o-ring sealing.
The one in your city water inlet assemble works the same (same type---plastic plunger/spring/o-ring)
If you remove screen/washer you will see the 'tip' of plastic plunger.
Pushing it 'IN' opens it. (same as water does flowing 'out' of WH tank) Don't push on tip opening plunger with water pressure in system...it will dislodge o-ring and then you will have to repair/replace check valve)
As showing in this picture......water flow is from 'right to left'
No water flow------spring pressure pushes plastic plunger closed and o-ring seals. (Spring is compressed when disc is forced open)
Back flow is prevented because water pressure pushes against 'flat' head of plastic plunger disc which is being held closed via spring pressure and o-ring sealing.
The one in your city water inlet assemble works the same (same type---plastic plunger/spring/o-ring)
If you remove screen/washer you will see the 'tip' of plastic plunger.
Pushing it 'IN' opens it. (same as water does flowing 'out' of WH tank) Don't push on tip opening plunger with water pressure in system...it will dislodge o-ring and then you will have to repair/replace check valve)
As showing in this picture......water flow is from 'right to left'
