Water Pump

[TerryA]

Our domestic water pump seems to have died after 20 odd years. It was a simple system requiring the pump to be switched on and then a tap opened in the heads or galley to use the flow. Looking at modern systems it seems that an option is to install a pump that works on demand but then needs an accummulator to maintain the flow. Any thoughts on pros and cons please?

 

[Ardenfour]

Just get a pump with built-in pressure switch. Power up the pump with the tap closed. The resultant pressure build-up operates an internal switch turning the pump off. Open the tap, the drop in pressure switches the pump on and water flows. Commonly available pump.

 

[Malish]

Also alerts you toa slight leak...

 

[Plum]

Our domestic water pump seems to have died after 20 odd years. It was a simple system requiring the pump to be switched on and then a tap opened in the heads or galley to use the flow. Looking at modern systems it seems that an option is to install a pump that works on demand but then needs an accummulator to maintain the flow. Any thoughts on pros and cons please?

I fitted a jabsco Par-Max 2.9 (model no. 31395-0292). Works on demand due to pressure drop when you open a tap. Does not need an accumulator as there is a small delay between the auto switching from on to off which prevents the rapid pulsing of the older style pumps. Have been very happy with mine for nearly 3 years.

www.solocoastalsailing.co.uk

 

[jiris]

E-bay is full of "membrane pumps" with pressure switches, just pick up one to meet your requirements. Accumulator is needed only when the pump is being used to produce only small flow, in which case the frequency of pump switching would be too high. In most cases this is not the case and the flexibility of the piping provides enough "buffer" .