I am in the process of building my rain water harvesting systen.
So far I have all the outside taps, all three toilets and the washing
machine all plumbed on seperate white plastic pipework going to the old
cold water tank in the loft. This cold water tank can hold 250 litres.
(all my other pipework is in copper to avoid confusion)
(the cold water tank was repurposed for rain water as there is now a
combi boiler so rendering the immersion tank and cold water tank
superfluous... so I decided to re-use the cold water tank for being able
to store an extra 250 litres of rain water.)
There are two cistern ball valves with isolation valves. One is for rain
water and the other is for potable cold water supply. (There is a
potable water supply to the loft in case we have droughts and I can
switch between this and rain water for the loft CW tank.)
OUtside, I have all my guttering feeding into 8 off interconnected 600
litre IBC's. The reason why 600 litre IBC's were used is to use a narrow
long dead end alleyway down the side of the house to hide these 8 off
600 IBCs. SO these will be stacked in a 2 high 4 long configuration.
I now have to choose a pump that will pump the rain water from the
ground level interconnected IBCs up to the loft water tank. The pump must:
(a) be able to connect to 22mm pipework
(b) Be able to pump from ground level up to the loft so that means a
need a head of 10 metres
(c) have an integrated pressure switch so it will start and stop
automatically depending on what the ball valve in the loft tank is doing
(d) be self priming
Any recommendations for a pump to fit the above criteria but without
costing the earth?
I incidentally already have a Salamander shower booster pump and a spare
CH pump in my possession in case these can be reused with modifications?
I can put this pump outside with the IBC's or in the loft next to the
loft tank. Which is better and why?