Hi there, I have a few questions, hopefully not to many. I just purchased a house with pool and the pool equipment is a bit old. Pump motor just died yesterday and I would like to get the equipment replaced. I currently have a GE MOD 5KC39UN6086X motor along with a Pentair FNS (FLT FNS + 36) filter. using the how to guides I came up with the following numbers to figure out pump size. 18,900 gal
GPH = 2,362.5
GPM = 39.38
60’ of head, / 3 = 20
I feel I need some guidance since based off of the numbers I should be getting a 1/2 hp moter. The current motor is a 1.5. Was looking at replacing with a Hayward Super Pump. I would like to replace the filter system as well with a cartridge system if that is possible. Any guidence would be appreciated.
JB
jb.schroeder@yahoo.com
Hello JBShroeder - We’d be glad to assist you. We would recommend the Hayward Super Pump VS model SP2602VSP. This is a variable speed pump and one of the most energy efficient options available. The total HP is 1.5 but you would only need to use the high speeds to vacuum. The rest of the time you could run it on a low speed to circulate the water.
We would recommend a cartridge filter that’s around 100 square feet. Something like the Pentair Clean and Clear 100 model 160316.
Thank you for shopping with INYOpools.com!
In calculating total feet of head, do you need to consider return length of pipe. It seems your calculation ended with the heater.
My pool equipment is approx 120 feet way from the pool with one skimmer, one main drain and three separate return pipes. All 1.5" PVC.
I want to change out the pump and sand filter; pool has 42000 US gallons, currently using 1.5HP SF 1.1 Sta-Rite pump. I have sand filter, UV, heater , and chlorinator.
Without considering length of return pipe, I am at 132 feet of head. I am thinking of using Whisperflo WF-28 pump and Pentair QUAD DE 60.
My final question: when looking at pool equipment performance curves, they all seem to top out at 110 TDH. what happens in my case. Do I have to expect less GPM than 60-70? What does curve look like then