Pond and waterfall pumps ... how to measure flow rate required
You need a pond and waterfall pump that gives you the desired flow to suit your needs. So how do you find out how much water you need to pump. It's easy .....
If you would like to test how much water looks best for your waterfall do the following .....
i) Place a hosepipe into the waterfall inlet
ii) Adjust the flow until you are happy with the effect
iii) Without closing the hose fill a known volume container from the hose pipe
iv) Calculate the flow rate by dividing the volume of the container by the time taken
to fill it. This week's free calculator could come in useful here.
v) This calculator would also allow you to weigh the container as an alternative to
knowing its volume.
For water use the following:
1 US gallon weighs 8.83 lbs
1 Imperial gallon weighs 10 lbs
1 litre weighs 2.2 lbs
vi) If one hose does not deliver sufficient water then use 2 hose pipes.