Lost in bad advice, pleas help with pump/filter/pluming scenario...

Aug 6, 2022
13
Arizona
Hey everyone.

I live in AZ where equipment takes a beating from the sun. I've recently come down with a bad case of algae after pump stopped running while I was on vacation. It's since been cleaned but I need help getting set up on a new pump system.

Local pool store recommended replacing my 1hp Hayward Super 2 with a 2hp B+D pump. I'm wondering if there is a way to set this 2hp unit to not ruin my system, being overpowered:

Roughly 12,000 gallon in-ground pool

Hayward DE3600 36sqft DE grid filter
- 72GPM design flow rate
- 50 max PSI

1.5 inch PVC
- individual skimmer and vacuum lines to a 3 way Jandy feeding pump
- DE filter exits to a slide valve for backwash
- pressure lines from slide valve goes to another 3 way Jandy for returns (3 into pool) and a water feature
- small PVC and valve pictured are for the aerator which is almost always off but I'd love to run it and the water feature more frequently

Pump sits roughly 15ft from the pool
- pool is kidney shape with 4ft shallow and 5ft deep middle

Is there a way I can program this 3450 RPM pump to work efficiently and without exceeding around 45GMP (I'm reading this is the max efficiently for PVC size) or is this pump WAY too big for my setup?

I have my current non-variable pump running full time at 3450 RPM but only at 1hp. Does the extra 1hp equal more GMP or is the 3450 at 2hp doing the same job, more efficiently? Sorry, new to all this and don't want to blow up a filter or pipes if unsupported.

Pic attached. Thanks!
 

Attachments

  • 20220804_111603.jpg
    20220804_111603.jpg
    539.4 KB · Views: 6
If you purchase a variable speed pump (highly recommended), you can turn the speed down very low and run it 24x7 (if you like) and save quite a bit of money (and noise) compared to your current pump. If the Hayward is a 2 speed, it’s better than what you got but the full variable would be way better. If you are getting by with 1 hp, you probably don’t need to spend the money for more hp.
 
If you purchase a variable speed pump (highly recommended), you can turn the speed down very low and run it 24x7 (if you like) and save quite a bit of money (and noise) compared to your current pump. If the Hayward is a 2 speed, it’s better than what you got but the full variable would be way better. If you are getting by with 1 hp, you probably don’t need to spend the money for more hp.
Thanks for replying!

The B+D 2hp I bought is full variable with 4 modes. I just don't want to try for 3000 RPMs a couple hours a day if the filter/pipes can't support that.

Is there any difference in 2hp 3000 RPMs vs 1hp 3000 RPMs or does the 2hp just not have to work as hard?

Ideally I would just use at a lower RMP, as you suggested, for more of the day. Also, I got the 2hp for the same price as the 1.5 on sale so went bigger.
 
Your 2 HP is not too big at max RPM and your pipes can take a lot more then 45 GPM. I doubt that pump can flow more then around 70 GPM at full speed.

Run the pump at the lowest speeds that works in your pool for chlorinating, filtering, and cleaning.
 
  • Like
Reactions: Bperry
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.