vanibrown said:
My hubby told me that I was wrong when I said I was going to turn on 3 hoses, (all from the same house) that it would fill faster, he said it decreases the pressure. That one would fill just as fast.
I hate to get into a domestic dispute, but I think you are the one who is right in this scenario.
When filling a pool you need to get X gallons into the pool to fill it up. To dtermine how long it will take, it is flow rate that matters as measured in gallons per minute (GPM). Pressure is only ONE factor in determining flow rate. Other factors include diameter of hose(s), and length of hose(s), elevation change, etc..
If you add another hose, you will almost certainly increase flow rate because you are doubling the diameter, assuming the hoses are the same. There will be some drop in pressure, but it will undoubtedly be offset by increased flow rate from the increased diameter.
There is an easy test of flow rate:
1, get a bucket that holds a gallon or more.
2. Time how long it takes to fill with one hose and calculate GPM
3. Time how long it takes to fill with two hoses running and calculate GPM.
In my case the increase in GPM was dramatic going from 1 hose to 2 hoses and still quite significant going from 2 hoses to 3. Of course filling the upstairs bathtub became an hour long task while all 3 hoses were running
