would 2-speed pump aggravate already-poor circulation?

PoolCleanerMom

LifeTime Supporter
Aug 26, 2009
123
SF Bay Area (Lamorinda), CA
Been perusing the threads about switching to 2 speed pumps for energy savings but am wondering: our pool (details in siggy) still has its original late 1960's/early 1970's plumbing - one skimmer, one vacuum inlet, one return, the main drain was shut off by previous owner (prob. because it has the noncompliant cover), valves for adjusting the flow are frozen in place. So circulation is already sub-optimal with the current pump setup. In this case, would it still make sense to change to a 2-speed pump or with our poor circulation should we stick with the current pump?
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,880
Silver Spring, MD
Only having one skimmer and one return doesn't mean you have to have bad circulation. Careful adjustment of the aiming of the return fitting, to get water moving along in the proper direction, can still give very good circulation, even with only one return.
 
G

Guest

Good chance that aiming the return in a 1960's IG pool is not going to be an option, unfortunately. On the other hand, an old pump that did "work" for all these years will have been much less efficient and effective than todays pumps. I doubt that you'd have any "more" problems than you have now, and it should work better than what you had/have!
 

PoolCleanerMom

LifeTime Supporter
Aug 26, 2009
123
SF Bay Area (Lamorinda), CA
simicrintz said:
Good chance that aiming the return in a 1960's IG pool is not going to be an option, unfortunately.
Yup, there's no "aiming" possible - the return is just a 1.5" diameter pipe (no eyeball) that's angled so that the water is directed maybe somewhere between 15-30 degrees to the right of perpendicular.
simicrintz said:
On the other hand, an old pump that did "work" for all these years will have been much less efficient and effective than todays pumps. I doubt that you'd have any "more" problems than you have now, and it should work better than what you had/have!
Hubby estimates the current pump/motor is probably about 6 years old - has efficiency improved much in the past decade?
Thanks!
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,880
Silver Spring, MD
Pumps that are about 10% to 20% more efficient were available 6 years ago, but they were somewhat rare. These days they are somewhat more common, though not universal by any means.

Getting a smaller pump or a two speed pump running on low makes a much larger difference than the efficiency of the pump.
 
G

Guest

It's "Old School", MITS; they inserted the pipe at an angle to try and "aim" the water (typical of that time, and occasionally still today!). Can't get an eyeball fitting on those, unfortunately.