I had a thought I wanted to throw out for discussion.
Assuming one has a clean filter, an accurate head loss graph and weighs a gallon of pool water, do you think it's possible to hook up a hose to the return then put the end of the hose in to a container for 5-10 seconds, weigh the total amount then divide by the gallon of pool water result to get gallons flowed during the 5-10 seconds, multiply to calculate GPM, pick this point on the pump curve line then intersect for head loss?
My pool has one return. On a pool with multiple returns I assume you can shut them down for the test, or some additional calculation would be needed to get an accurate result?
Assuming one has a clean filter, an accurate head loss graph and weighs a gallon of pool water, do you think it's possible to hook up a hose to the return then put the end of the hose in to a container for 5-10 seconds, weigh the total amount then divide by the gallon of pool water result to get gallons flowed during the 5-10 seconds, multiply to calculate GPM, pick this point on the pump curve line then intersect for head loss?
My pool has one return. On a pool with multiple returns I assume you can shut them down for the test, or some additional calculation would be needed to get an accurate result?