Re: Looking for used sand filter - questions.
BigIslandPoolService said:
Aloha y-not!
OK, here's my perspective...even when you get your bigger pool, the gallonage will still be considered a "small pool"...so you don't need a powerful pump, as others have pointed out.
Aloha! to you as well, BIPS.
LOL :-D
So what's a "large pool"?
My aunt's last house had a 40k-50k gal IGP pool. It was a stinkin' monster for a backyard pool.
Is that "large"? Or are we talking public pool, or even Olympic 800k gal MONSTER here? LOL
Which brings me to this. The "Hydraulics 101" article by mas985, says that for a 20k gal pool I should have 3.7 sq-ft sand filter. That's HUUGE!!!
I know this because my aunt's pool had a Sta-Rite System 3 sand filter and I'm pretty sure it was the larger of the 2. Which meant it held something like 350lbs of sand and was about a 3.7 sq-ft filtration area. Her pool stayed quite clean! We won't count the bottom, that was due to bad jets and a failing pump with bad bearings. Still seemed to HAUL on the water output though. SHEESH!! That thing was a MONSTER!! The wet head was about the size of a smaller serving platter and the whole unit from front to back, including basket was probably about 2-1/2 ft.
But the water stayed clear, just stuff settled on the bottom from bad circulation.
According to Mas's article, her pool would have need 3 of those units. YIKES!!! That would have taken up an entire small bedroom, which was about the size of the pool house. Yeah, it had an actual "pool house". LOL
Surely that can't be right?
BigIslandPoolService said:
Look for a brand new Hayward SP 15922S pump. That is a 1 HP 2-speed pump...extremely inexpensive, more robust than the Pentair equivalent (I have installed both, and while I love Pentair and speak highly of their pumps, in this case, the Hayward Kicks Butt!),
So if I'm reading you right, the Hayward is good at my budget, the Pentair is probably better if I had the money to blow. Yeah??
BigIslandPoolService said:
..nearly silent in LO speed, powerful for vacuuming in HI speed, and it just sips electricity on the low speed! All of these pumps that I've installed have done their job perfectly. Even when placed 12" ABOVE water level. Amazing pump for the money.
I thought Hayward's pumps were absolute garbage for the most part, cheaply made and don't last long. I know we all like our "brands", but some stuff is just.
What's the deal /w the bad blood toward Hayward?
You say you have installed some, however many, how long have some been in service? What's their life like before they either fail/out-right die, or start to buzz & howl?
BigIslandPoolService said:
One caveat...it is 115V only--no voltage variability, due to the rocker switch on the back cover (LO, OFF, HI).
Ha, that's OK, in fact, I'm relieved. I wasn't looking forward to wiring 220v all the way from the front of the house, to the back. Oy'vey!!
But I was going to do it if need be, since I know 220v is way more efficient on high draw equipment such as a power hungry pump.
BigIslandPoolService said:
Also it comes with a plug, so you'll need either a socket near your pool or you'll have to rewire it watertight with your own wiring.
No biggie, we all know how to wire things around here.
BigIslandPoolService said:
Filters are a tossup. Sand filters are easy to maintain...you don't need a huge one...just big enough to handle your vacuuming at HI speed (normal 3450 RPM). maybe just a 100 lb. 24" model?
Has to be sized to the pump, right? How do you determine that anyway? Based on flow rate it sounds like?
BigIslandPoolService said:
I can't seem to find any rating for that pump on HI speed, but I would guess that it is easily going to be 60 gpm.
Neither could I, it's like that model doesn't exist as far as Hayward is concerned.
Would it be the same on high as the single speed model listed here?
BigIslandPoolService said:
So get a filter that will handle that flow rate...
So the filter's flow rate should be above the max flow rate of the pump, or something different than that?
BigIslandPoolService said:
on LO speed your pressure gauge will show a real low reading (it's GREAT for filtering), and while vacuuming, I wouldn't be upset if it went up as high as 25 psi.
WOW!! That high huh?
BigIslandPoolService said:
But the lower your reading on the pressure gauge while vacuuming, the better your sand filter will work.
I presume this has to do with the pump BLASTING water through the sand bed at too high of a rate, so the particulates don't have time to get trapped in the top cake. Yeah?
So long as it's under the filters max flow rate, it's OK? Or no?
BigIslandPoolService said:
You can't go wrong with that Hayward pump...it's a real workhorse that keeps your electrical bills in their place--reallly important out here where electricity is 46 cents per kilowatt-hour!
Yeah, we're pretty stupid high here too. I still haven't really figured out how to read the power company's bill, or the data on their website. I swear I'm not dumb, far from it, it's just there's a lot of data there and I don't know how they add it all up and what. Delivery fees, taxes, other fees that go up/down based on how much you consume, etc.. All on top of the $/KWh rate. Do you add it all, then divide it? Plus it's going to go up since whatever you're adding will eat more power, so then the delivery fee and all that jazz goes up. Oy'vey! I have been meaning to call them, but I keep putting it off.
I so want to shove that Wired magazine article in their face, as well as my Dr's lab, that show how these industries can simplify their bills. UGH!
So Aloha is hello & goodbye? I recall that being the case... so weird. HAHA