Have been organising to get our water tanks off a pressure pump, and put up the hill a bit, and use gravity for pressure.
The tank arrived today, and although I specified 50mm outlet, they made it 40mm (1.5 inch). What effect, if any, will this have on our water pressure ?. The outlet is to be hooked up to 50mm poly pipe.
From memory, for every 23 inches of water head, you get one psi (I think), so the head will be the same as planned, but it will now be coming out of a 40mm outlet, not a 50mm outlet.