Replacement pump....... again!

[sktn77a]

OK, I know this has been asked many times before but I need to replace my 20 year old single speed pump - Sta-Rite P2RA5E-124L pump, AO Smith B848 motor (1HP SF 1.65). I have a single suction pipe from the skimmer (no main drain) and 2 returns to the pool - all 1.5" PVC pipe. Hayward 24" sand filter, pressure 12-15psi. No water features or spa.

I've decided to replace it with a ~1HP 2 speed Pentair Whisperflo pump (as opposed to a VS pump) but don't know whether to get the WFDS3 or WFDS4.

Will use the slow speed for filtering and the high speed for heating/Polaris 380 cleaning.

Advice?

Thanks

 

[Jimrahbe]

s,

Looks like the WFDS-3 is a 3/4 HP, 115 volt pump.. While the WFDS-4 is a 1 HP, 220 volt pump.. (Which I assume you already know...)

If you have no water features, then I would go with the 3/4 HP one.. Of course that also depends on how your pad is wired... If you only have 220 at the pad then there is only once choice..

Thanks,

Jim R.

 

[sktn77a]

Thanks Jim. I can do either 110 or 230. My existing 1.0/1.65 HP Sta-Rite pump has worked fine for 20 years but is approaching the end of its useful life (both wet end and motor). My only reservation about the 3/4 HP main pump is that my Polaris/Hayward booster pump is also 3/4HP. I would have thought you would want a higher flow pump for the main pump vs the booster pump(?)

 

[Jimrahbe]

s,

My understanding is the you want the main pump to circulate the water in the system and then the booster pump increases the pressure going to the cleaner...

But, I have never had a pressure side cleaner so let's hope one of our pump experts can chime in...

Thanks,

Jim R.

 

[kadavis]

You could probably put in a Whisperflo 1/2 HP single speed, and get all the flow you need.

 

[CJadamec]

Yea I'm thinking the 3/4hp will be plenty of pump. The 1hp pump would also be fine. When running at low speed the two pumps will be very similar to the point where I doubt you would notice the difference between the two.

When running high speed they will both move more than enough water for your pool.

Get the one you can get a better price on.