The message
from "P. Alves" contains these words:

Hi,

This is a bit off-topic but...

I bought a property that has a well (2.6m diameter) and I am buying a
submersible pump. I have a system of 5 impulse sprinklers, the most
distant one is about 60 meters and it is not working very well with
the water from the council, each sprinkler has a 870 litres per hour
max flow. now I can opt for one of 2 pumps. one with more water but
less pressure (4.8m3/hour and 85m height max), and another one with
more pressure but less water (7.2m3/hour and 62m height max)... Any
advice on which one to choose? anyone with experience on this.

Thanks in advance.

Well, I used to live on a smallholding with no electricity, and water
from a bore. A stationary enging turned a rotary-to-reciprocation
mechanism which operated a pump at the bottom of the bore - 180 feet
down.

The water was pumped into a 3,000 gallon header tank which was on 15 ft piers.

Even with the tank full, allowing for about 20 ft of head, the pressure
wouldn't spray from a pretty basic hose-nozzle.

However, I'd have thought that either of the pressures you quote would
be adequate, but, look at the figures again: I think you have them
arse-about-face.

I've no doubt that someone will be able to tell you where you can get an
in-line (or rather, off-the-line) water pressure gauge so you can test
your sprinklers against the mains pressure. This should give you some
idea of whether you need extra pressure or more flow.

--
Rusty
Direct reply to: horrid dot squeak snailything zetnet point co period uk
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