I have a 12,000 gal pool, with 2" suction and 1.5" return. Rheem P-M266A gas fired heater and Pentair S7M400 filter running at 14psi when clean. There are not water features, spa, vacuum, etc. Very simple. All equipment is on same level as pool and within 20-30 feet.
Current pump is Hayward SP3010EE with a 0.75hp single speed motor. It is leaking.
I have been researching Hayward Super VS as possible replacement and could use some advice.
I don't have a suction pressure gauge on the suction side, but my understanding is that the 14psi at the filter would result in 32TDH. I am guessing here, but adding TDH from suction side might at 20 to 30 or a system total of 45 to 55TDH?
When I look at flow curves for the old Super II 1.6HP compared to the Super VS both running at 3,450, the Super II appears to put out much higher GPM for any given TDH. For ex, for TDH of 45 to 55, the Super II 1.5HP indicates 75-83GPM while the Super VS running at full speed indicates 50 to 65gpm.
The 3/4HP Super II indicates 52 to 62TPM - close to the Super VS 1.6hp running at full speed, but drawing double the amps? This eats up most of the cost savings I might receive by running at a lower speed.
And how would I calculate how long to run at lower speed if the pump doesn't seem to support a TDH over 30?
I'm new to all of this, so I'm sure there is something I am missing.
In addition, at speeds beow 3000RPM, the flow charts don't even reach 30TDH - which I exceed in my return side alone?
In addition, the Super VS 1.6HP model requires almost double the amps of my existing 0.75HP motor at full speed which I figure should run at least a couple of hours every day.
