Re: Looking for used sand filter - questions.
linen said:
y_not said:
MAS985 says her size pool, assuming it was 50,000 gallons, which I'm pretty sure it was based on its dimensions and at the least no less than 40k gal. Says you'd need a filter with a capacity of 9.3 sq-ft of filtration area. That seems like utter insanity!!!
First, that is a very large pool, I can not recall many we hear about that are that big. The recommendation for sand filter size comes from ANSI/NSF 50 Specifications for public pools. The larger the filter the less frequent backwashing needed. Also, some pools have more to filter out then others and we want to make sure that we are recommending big enough to make it trouble free for most situations.
Yeah, it was a monster of a pool. I have seen a few users on here with pools this size. I know someone has a 50k gal pool. Maybe the guy that used to have the military salvage one??
It'd be cool to see who has a pool this big and what sort of filter they have and if they get away with it or not.
She (my aunt) doesn't live there anymore, moved out last spring, so I can't go measure it.
I think I posted a picture of it here, at some point, looking south off the 2nd story deck @ the north end of the map.
I'm dying to know its size...
So I did the next best thing. I went to Google maps and zoomed in on her, then used the ruler to do a scale conversion and measure the pool from point to point.
It's a bit of an odd one, as you can see here.
http://goo.gl/maps/hYCH1
*Switch off 45deg view in the drop down on the right, that way you can see the full pool in an overhead 90deg view.
The shallow end is 21ft wide and the deep end is 19ft wide. Full length is 40ft (1/4 Olympic lane length).
Shallow was designed with a high focus on kids, so instead of only a narrow 4ft deep area for them to play in, it's nearly 20ft. That's because it starts out at 3ft deep and has an unusually gradual slow grade downward. By the time it reaches the point where the width narrows, it's maybe 4ft deep or a bit more.
Then the deep end doesn't have a gradual hopper, it's about a 70deg slope, in about 1ft out, it's BAM! 8ft deep or so. Then a gradual slope from there down to about 10ft. near as we can recall for depth. Someone in the fam measured it, that's what I can recall.
Pool calc says it's just shy of 40k gal and I figure with the way it's designed in the depth delineations, it's probably right at or slightly over 40k gal.
The thing's up on the market and it's cheap, last I checked anyway.