whale pump problem

[martidj]

I drained my fresh water tank and have just refilled it. I find that the pump for the wash basin is pumping but the sink is only giving air. A bit strange as they are practically next to one another. Does the sink one need priming in some way.

 

[johnphilip]

Are there really two separate pumps?

 

[Oldhairy]

Had a similar problem some years back so the details are a bit vague. When I over filled a tank the pressure popped one of the hoses on one pump. That made the other pump suck air.

 

[VicS]

I drained my fresh water tank and have just refilled it. I find that the pump for the wash basin is pumping but the sink is only giving air. A bit strange as they are practically next to one another. Does the sink one need priming in some way.

Diaphragm pumps as far as I know which should be self priming.

Maybe some debris in one of its little valves. Maybe a flush through will dislodge something. Maybe dismantling and cleaning will do the trick.

 

[martidj]

Thanks for the replies. I will just have to dismantle and have a look.

 

[KellysEye]

> Does the sink one need priming in some way.

We used to get no water flow with the sink freshwater foot pump if we hadn't used it for a while. Before taking it apart what I did was tape a plastic tube to the outlet, to seal it, then suck until water comes through then the pump may well work. If not, as said, take it apart.