Home Page link

Swimming pool pump sizing question.

Home| Search | About
Login Password
Register Now! Lost Password?

Home Repair - - If it ain't broken, don't fix it. Otherwise look here. 

Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Swimming pool pump sizing question. Wes 11-15-2006
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by Wes on November 15, 2006, 5:33 pm


I need to replace my pool pump as the bearing are gone and I am leary
of previous cavitation trouble. I have been to three different pool
stores and have been given three different recommendations. Now I want
the real answer, not just what they are trying to sell me.

Specs:

20,000 gal pool
Pool/Spa combo with 4 spa jets
2" PVC supply lines
2" PVC return lines
Pump - currently a Pentair Whisperflo 1HP Full-rated 115/208-230 volt
(original equip from 1986)
Filter - Jandy CL460 Cartridge
Heater - Raypak RP2100 Natural Gas
Cleaner - Suction side Kreepy Krauler type
Equipment is located about 40 feet from the skimmer
Need to have a pump that is as quiet as possible as it is located right
under a window of our house.

Advice so far:

1. Replace only pump MOTOR and seal with same exact single speed 1 HP
Whisperflo motor. (Was told least expensive and all that needed to be
done)

2. Replace entire pump with single speed 3/4 HP Full-rated Pentair
Whisperflo.
(Was told the larger pump size causes cavitation and is louder, and
that 3/4 is plenty strong enough for spa jets)

3. Replace entire pump with 1.5 HP Full-rated Pentair Whisperflo.
(Was told needed larger pump to match large filter size and decrease
circulation time)

4. Replace entire pump with 1 HP dual speed Pentair Whisperflo.
(Was told it is the quietest ,most energy efficient, but more likely to
malfunction early and much more expensive)

Questions:

1. Is filter oversized? It is brand new, put in by the pool company
that replastered.
2. Which option above is best for this pool? Or other option even
better?

Thanks!

Wes


Posted by on November 15, 2006, 5:53 pm



>I need to replace my pool pump...

>Specs:
>
>20,000 gal pool
>Pool/Spa combo with 4 spa jets

How does one pump do both the pool and the spa, with different temps?

Nick


Posted by Wes on November 15, 2006, 6:04 pm


I think this is pretty standard plumbing.

A valve controls where the water is coming from pool or spa, and
another valve controls pool or spa return. There is an overflow form
the spa to pool if needed.

I have to isolate the spa circulation and "bring the spa up to temp"
when I want to use it.

Wes

nicksans...@ece.villanova.edu wrote:
>
> >I need to replace my pool pump...
>
> >Specs:
> >
> >20,000 gal pool
> >Pool/Spa combo with 4 spa jets
>
> How does one pump do both the pool and the spa, with different temps?
>
> Nick


Posted by Richard J Kinch on November 15, 2006, 7:15 pm


Wes writes:

> 1. Is filter oversized? It is brand new, put in by the pool company
> that replastered.

What does Jandy say?

Oversized? Undersized is what you worry about.

> 2. Which option above is best for this pool? Or other option even
> better?

Go with the lower HP, 1 or 3/4. Smaller pumps are much more efficient.
Cheaper to run them longer for the same volume pumped than a larger
motor in shorter time. Better for your pool sanitation as you're
circulating and skimming longer during the day for the same money.

That said, if your existing motor just has bad bearings, bearings are
cheap, maybe $10 for a set. They don't like you to know that at the
pool store, of course, and will deny that you can fix them. But unless
your motor is literally burned out, or corroded badly, you can just
disassemble the pump and motor and replace the bearings. Look for a
bearings distributor locally, or as a second choice an electric motor
repair shop. Or just measure the old bearings and order them out of
http://www.mscdirect.com/.

Posted by Bob F on November 16, 2006, 2:54 am



> Wes writes:
>
> > 1. Is filter oversized? It is brand new, put in by the pool company
> > that replastered.
>
> What does Jandy say?
>
> Oversized? Undersized is what you worry about.
>
> > 2. Which option above is best for this pool? Or other option even
> > better?
>
> Go with the lower HP, 1 or 3/4. Smaller pumps are much more efficient.
> Cheaper to run them longer for the same volume pumped than a larger
> motor in shorter time. Better for your pool sanitation as you're
> circulating and skimming longer during the day for the same money.
>
> That said, if your existing motor just has bad bearings, bearings are
> cheap, maybe $10 for a set. They don't like you to know that at the
> pool store, of course, and will deny that you can fix them. But unless
> your motor is literally burned out, or corroded badly, you can just
> disassemble the pump and motor and replace the bearings. Look for a
> bearings distributor locally, or as a second choice an electric motor
> repair shop. Or just measure the old bearings and order them out of
> http://www.mscdirect.com/.

I bought them at the pool equipment store. Bearings and seal.

Bob



Similar ThreadsPosted
Swimming Pool Pump Question January 9, 2006, 4:36 pm
Re: Swimming Pool Pump - 2 Questions May 6, 2006, 5:02 pm
swimming pool pump and filters June 14, 2007, 10:38 am
Need help on a swimming pool cleaner question.............. October 6, 2007, 6:32 pm
In-ground swimming pool question August 27, 2008, 2:35 pm
swimming pool solar heater question March 11, 2006, 1:21 pm
Swimming Pool opening/closing question June 5, 2006, 11:16 am
Swimming Pool Filter Selection Question May 4, 2007, 9:57 pm
Pool Pump Question May 21, 2006, 5:46 pm
Pool Pump Motor Question July 6, 2007, 12:44 pm

Contact Us | Privacy Policy

XML SitemapXML Sitemap