Can you fit a timer to a shower pump?

[ban-all-sheds]

With the greatest of respect for BAS's suggestion, why not just make up a by-pass for the pump and install a NRV, the water wil take the easiest route and almost rule out a potential failure of a motorised valve if you fit a timer.

They are used a lot in CH systems - are they unreliable?

But your idea would be cheaper. Would it work OK when the pump was running? The NRV would stop any back-pressure problems, but would you still get some flow bypassing the pump?

 

[plugwash]

If flow is bypassing the pump then the pump wasn't doing anything useful in the first place, the whole point of a pump is that the output presure is higher than the input presure.

 

[ban-all-sheds]

Think of resistors in parallel - it doesn't matter what the relative values are, current always flows through both...

 

[mickroyds]

With the greatest of respect for BAS's suggestion, why not just make up a by-pass for the pump and install a NRV, the water wil take the easiest route and almost rule out a potential failure of a motorised valve if you fit a timer.

They are used a lot in CH systems - are they unreliable?

But your idea would be cheaper. Would it work OK when the pump was running? The NRV would stop any back-pressure problems, but would you still get some flow bypassing the pump?

Morning BAS

NRV's are normally closed, assisted in that by a very light spring, if there is a small flow through the pump all the better (in its unpowered state).
Cost wold be more economic.
It may be worth checking the flow/supply up to the pump.

Interesting to know the case for the pump in the first place, poor mains pressure, header tank not high enough ??

Mick.

 

[ban-all-sheds]

header tank not high enough ??

Or do you fancy one of these in your back garden...

?

 

[mickroyds]

Looks like mine .... but I have roof tiles fitted.



Mick.