I need a pump lesson please

[gordonhyde]

my pool specs (we start digging in 3 weeks)
38k gals
2" pipe

Full rated vs max rated? humm

[mas985]

The easiest way to compare pump efficiencies is to look at each pump's head curve. You will notice that for a given head, the Northstar will have the highest flow of any of the pumps listed which also means the shortest run time for a given turnover. The extra money spent on the Northstar will probably pay for itself in the first year.

Also, for an 8 hour turnover, you only need 80 GPM so 1 1/2 HP may be too much pump. 80 GPM for the Northstar is over 70 feet of head which is very unlikely if you are using at least 2" pipes.

To learn more about pumps, head, turnover and other issues, I recommend this site as a primer.

http://poolplaza.com/pool-pump-sizing-2.shtml
http://www.poolplaza.com/pump-ratings.shtml

[tphaggerty]

The Hayward SuperPump is very LOUD. I am replacing mine (only one year old! - you want to buy it??) with a super high efficiency Ikeric multi-speed pump. Very expensive to buy, but much cheaper to run and supposedly very quiet.

The Ikeric is a rebuilt, rebranded Sta-rite Dura-Max II (I believe), so that pump might be quiet as well. Since you are already replacing a pump, I would consider the environmental apects.

I would also recommend looking at a 2 speed pump. The price delta is small, but the cost savings can be substantial, and if you run your pump while you are swimming, low speed can be MUCH quieter.

[Simmons99]

I also have the Hayward Super 2 pump - but it doesn't seem noisy to me - maybe the sound is drowned out by the kids screaming and jumping in the pool .

But seriously - I don't notice the noise at all.

[markphin]

a noisey pump may be because of a clogged impeller.

[tphaggerty]

Nope. Brand new pump, not clogged. It is fairly close to the pool and has been (relatively) noisy since day 1. I live in a very rural suburban neighborhood that is very quiet. We notice the noise primarily when NOT swimming.

Like I said, I have the original Superpump, not the Superpump II, which may well be much quieter. The original is basically 15 year old technology, still sold today!

[mas985]

Nope. Brand new pump, not clogged. It is fairly close to the pool and has been (relatively) noisy since day 1. I live in a very rural suburban neighborhood that is very quiet. We notice the noise primarily when NOT swimming.

Like I said, I have the original Superpump, not the Superpump II, which may well be much quieter. The original is basically 15 year old technology, still sold today!

What is your filter PSI reading? You mentioned that the pump is close to the pool so I would expect a low PSI reading and thus low head loss.

One thing that can increase the noise of any pump is when the plumbing has very little head loss. The water flow is high so it tends to create more noise. For example, I notice this when my solar is on and pump noise is less.

[gordonhyde]

The easiest way to compare pump efficiencies is to look at each pump's head curve. You will notice that for a given head, the Northstar will have the highest flow of any of the pumps listed which also means the shortest run time for a given turnover. The extra money spent on the Northstar will probably pay for itself in the first year.

Also, for an 8 hour turnover, you only need 80 GPM so 1 1/2 HP may be too much pump. 80 GPM for the Northstar is over 70 feet of head which is very unlikely if you are using at least 2" pipes.

To learn more about pumps, head, turnover and other issues, I recommend this site as a primer.

http://poolplaza.com/pool-pump-sizing-2.shtml
http://www.poolplaza.com/pump-ratings.shtml

Mark:

Thanks for the great info. The link above is perfect!!

Where do you live? Your pool setup up is almost what I am getting?
I live in the Phoenix area.

THX again..

[mas985]

Mark:

Thanks for the great info. The link above is perfect!!

Where do you live? Your pool setup up is almost what I am getting?
I live in the Phoenix area.

THX again..

I am in Northern California, SF bay area.