Advice sought on shower installation, using a loft tank.

[routerman]

My water feed is off a private spring shared between a number of houses. At times the volume of water available from the source is very low, so I loose pressue on the shower, so much so it just dribbles.
Pressure is not a problem most of the time, but at times when there is a high demand on the supply into the houses we loose it.

As we are putting in a new bathroom I thought no probelm, put a cold water rank in the loft, and feed the shower off that. But looking at electric showers for cold feed only, they all seem to need a minimum presssue of .7 to .9 bar, which I wont get with my loft tank.

What other type of shower system should I look at, I would like one that accepts a cold feed only, as my hot water is on economy 7 as well, so we have a limited amount of hot water available.

I've heard of power showers needing a loft tank, but they all seem to need a hot water feed as well.

I think what I need is a pumped system, where I fit the pump between the tank and the shower. So I turn on the shower, water flows, pump detects the flow and kicks in giving a decent flow. But how do I achieve this with a low initial pressure from my loft tank?

Andy

 

[Fluffster]

Andy
You can fit a negative head single impeller pump. You may need a pressure regulating valve inline as you do not want to blow the internal one on the shower.
Have a look at the mi although this method is not advised I have seen it installed and working very effeciently on at least 3 occasions.
Pete