Electric Shower Low Water Pressure.

well the line pressure will drop, but the approved pumps stop sucking when it drops below atmospheric. The most you can do with an unrestricted pump is to reduce the line pressure to vacuum, or approx -10m head.

Mike,

This all reminds me of the camp site in the middle of the circuit at Le Mans. Cold only. Plenty on Thursday, none by Sunday.

It's all Ohm's law for plumbers.

I don't think that pumps should be used to suck water up the mains - that potentially introduces a negative pressure. I rather doubt that the water pressure will drop to nothing so it should be possible to fill a tank at ground floor level. Then pump the water up to the shower head.

I might add that peoples' expectation of showers seems to have grown over the years.

I guess the moment someone without a pump turns a tap on, then air will be sucked into the system, and the chalet owners will be left trying to sort out airlocks in the system.

Well, you can increase the flow to a limited extent as the "sucking" action of the pump will help to overcome pipe friction. But we're talking theory rather than practice so I would suggest the only long term solution is cold water storage and a pump.

But then you're into re-piping the shower supply as you don't want to be drinking stored water etc.

@Zoomup “Yes Anglian Water has checked the pressure and said that nothing can be done to improve the water pressure, as the pipes are small, the chalets remote and high demands during the holiday season causes the pressure loss.”

I would guess the flow is insufficient as well, you cannot pump more out of it than is flowing in although you can increase the pressure of it.

We have this set up at our sailing club. With a mains fed storage in the loft and 6 pumped Triton showers to the ladies and gents. Works just fine.

My mother was very particular about the use of words, I remember a particular discussion after a regular customer passed comment on her use of rooves as the plural of roof in a quotation.

I never thought I’d see the day Zoomup reminded me of my mother!

Do you even know if the pipework is even supplied directly from the mains, there could possibly be an onsite storage tank which actually feeds the supply to the chalets.

Remember there’s a difference between flow rate and pressure.

For an electric shower you need to measure the running pressure with the water flowing, not the static pressure without any flow.

Yes Anglian Water has checked the pressure and said that nothing can be done to improve the water pressure, as the pipes are small, the chalets remote and high demands during the holiday season causes the pressure loss.

Z,