Help with new portable 100K gal pool for swim meet

[PoolDoc]

Do you have control of the operation?

Assuming that the answer is yes, I'd go for a
+ ~300 gpm circulation system,
+ use multiple cartridge filters
+ use a single Pulsar unit to meet continuous feed requirements,
BUT
+ use dichlor initially to chlorinate AND establish a CYA residual;
+ use cal hypo granular to do nightly 'shocking', adding the cal hypo upstream of the pumps
+ use dichlor added to the circulation stream, as needed to maintain chlorine levels during the meet
+ let the pH drift within whatever range is allowed by code, but favor the high end.
+ keep a small drum of 1:2 muriatic to water with your acid pump. (This mix does NOT fume!)
+ use borax to raise pH (after initial dose)
+ EXPECT that optimized chlorination may NOT require any pH adjustment: do NOT over adjust.

To complete what I'll start below, I need to know

+ code requirements for circulation rates, FC range allowed, pH range allowed, alk & calcium requirements, and CYA range allowed
+ inlet connection layout on the pool (specs & drawings)
+ electrical power availabililty


Let's check volume: 75 * 42 * 4 * 7.48 = ~94,000 gallons (assuming spillover is @ 48")
So, your pool factor is 1.28; inverse factor is 0.78

You'll need to allow for 8 ppm chlorine per day + 4 ppm per day during non-use intervals, so

CHLORINE REQUIREMENTS:
(8 * 4 * 0.78) + (6 * 8 * 0.78) = 25 + 37 = 62# of chlorine gas equivalent

STABILIZER REQUIREMENTS
40 * 0.78 = 31# . . . IF you can get 100% dissolution

SODIUM BICARB REQUIREMENTS (80 ppm)
80 * 0.78 / 0.58 lbs CaCO3/lb NaHCO3 = 108# baking soda
(this will be reduced by fill water alkalinity!)

BORAX SUGGESTED (30 ppm) => 2 x 100# bags + 12 gallons of HCl to compensate (borax not essential, but helpful)

CALCIUM REQUIRED?
none! it's a vinyl pool . . . but find out if your inspector will give you grief. If so, add the minimum does to make him happy. If he's using strips be SURE you buy a K2006 to test with, and show him, up front. Best to have him watch you test with the K2006, than let him use guess-strips. I've repeatedly had to add chemicals to 'correct' spurious problems generated by the inspector's strips!

CIRCULATION:
assuming a 6-hour code requirement:
97,000 / 6 / 60 = 270 gpm or more.

FILTRATION:
assuming cartridges, given the circumstances. (sand would be a total pain to set up and take down; DE would probably require a separation pool)
filter rate; 0.375 gpm /sft => 270 / 0.375 = 720sft

PIPING:
(only a guess, without seeing the pool specs)
max flow in 2" PVC is about 60 GPM
[ http://www.charlottepipe.com/Documen...ech_Manual.pdf, ]

That means you EITHER have to go to 4" piping, possible with headers OR set up multiple 2" or 2.5" circuits. Before I look at that, why don't you post a link the pool specs.

PUMPS:
The Pentair Challenger HiFlo pumps have the best match to the low restriction piping layout you'll have. The nominal 5HP model (CFII-NI-5FE or ) is available in both 3 phase and single phase,
http://www.pentairpool.com/pool-pro/...w-pumps-23.htm
http://www.pentairpool.com/images/pr...wCurve_new.jpg
and will run on a 30A single phase, or 20A 3phase circuit. The WhisperFloXF pump would be another option.

If two of these pumps are matched with 2 cartridge filters each, like the CCP-320,
http://www.pentairpool.com/pool-pro/...filters-27.htm
you should get excellent filtration performance of well over 300 GPM, and at very reasonable cost.


. . . continued later . . .