water loss from overflow pool

[timefore]

Can anyone give advice on water loss due to evaporation - we have a 10 x 5 overflow pool and would be interested on what sort of loss we should expect?

[MrA]

This is worth a look,

http://www.savewater.com.au/library/Dai ... ration.pdf

I dont have any leaks and lose about 1 ton a week in the summer and very little in the winter, but as the above says it has many variables. My worst loss is from vacuuming to waste and/or backwashing.

[TRNCVaughan]

Can anyone give advice on water loss due to evaporation - we have a 10 x 5 overflow pool and would be interested on what sort of loss we should expect?

The industry standard holds that a pool loses between 30% and 50% of its water through evaporation, annually.
Worse case - 50%
Pool contents (say) 100,000 litres
50% of 100,000 litres is 50,000 litres
50,000 divided by 52 weeks is about 1000 litres or 1 tonne, per week.
Evaporation is twice as much in summer and half as much in winter, but averages 1 tonne a week.
If your pool loses more than the above, you have a leak.

I can carry out a leak test for you to determine how much you are losing and where you are losing it.

[TRNCVaughan]

This is worth a look,

http://www.savewater.com.au/library/Dai ... ration.pdf

I dont have any leaks and lose about 1 ton a week in the summer and very little in the winter, but as the above says it has many variables. My worst loss is from vacuuming to waste and/or backwashing.

We can reduce your backwashing loses from tonnes a month to a few litres a month, by supplying and fitting a Cyclone filter which works on the same principle as a Dyson vacuum cleaner.

[PapaBravo]

What is the cost (fitted) of a Cyclone filter, please?

[Philoz]

It is worth putting a valve on your waste if you don't have one-it's not uncommon for the rubber seal in your multiport valve to leak to waste continually-as mine did.

[thornaby]

Do a bucket test to determined if loss is due to evaporation or a leak.
Stick a length of tape vertically on the inside near to the top and a length vertically on the outside about 1/3 of the way up.
Almost fill with water then place on pool steps.
Mark pool level on outside and bucket level on inside.
Evaporation will cause the same drop inside and out.
If you suspect a leak check the non return valve for leaves etc.
Some valves are incorrectly fitted to the suction (dirty) side of the pump instead of the delivery (clean) side of the pump.

[TRNCVaughan]

What is the cost (fitted) of a Cyclone filter, please?

http://www.waterco.eu/products?ptitle=m ... -filter_87

£850 inc KDV

[thornaby]

I estimate to use around 1 tonne of water / month on backwasing.
Not a vast amount of water.
If I were to fit a cyclonic filter it would be for the other benefits they offer other rather then the water usage of my system that does not have one.
It is worth remembering that these are a pre_ filter and do not replace the sand filter.
Biggest usage of water is the vacuuming which I estimate is around two tonne.
Regards putting a valve on the waste pipe to prevent water loss due to faulty O rings in the multi port valve, not so sure.
I would rather check and then resolve the problem.
If the seals are faulty then
I would expect to get contamination of the dirty water back to the pool because of it.
Just my thoughts.