I never check the levels right after a shock but I've never register any
level above 7ppm. Probably is real high right after shocking.
I'd say anything above 5 ppm could cause skin irritation, eyes burning
and maybe hair becoming brittle and washed out. You've heard of bleached
out hair. I don't know how caustic it is to equipment but it could cause
your gaskets and o-rings to wear out quicker. Breaking down the lube on
Hmmmm.... I, and others swim with open eyes, and none of that has ever
happened in my pool to my knowledge, to people.
As for the equipment ... who knows ... maybe.
When I had looked it up, I couldn't find any real evidence of problems,
but, again, that was a while ago.
Well...you know what bleach can do right?
At levels that high I get skin irritation and I'm not that sensitive. I
use eye protection but the kids eyes get red. I try to get them to wear
goggles, but you know kids.
3ppm is adequate and anything over that isn't effective anyway. But,
it's America and you can use more if it makes you happy. I'm just glad
you don't backwash into a field like I do.
It was hard to see in my picture as the camera was above water, but the
side wall unused vacuum port isn't plugged at all. It's got a nice female
thread, about 1.5 inches or maybe 2 inches in diameter (probably whatever
the standard size is).
It's unseen, but, the plumbing, almost certainly, goes from that side wall
female fitting to the unused vertical pipe at the pool equipment. It's really
hard to see in my picture, but, that 3'foot vertical pipe has an inline Jandy
valve, and then the top is simply plugged with a cap:
So, all I'd need to do (I think) is cut off the cap, and plumb into the 1.65HP
You can see in that picture above that I already have three Jandy valves on
the filter pump inlet side, so I'm guessing I don't even need to add an additional
Jandy valve to the four that would exist on the inlet side of the filter pump
were I to connect the vacuum to the filter pump (via a "T"?).
If the 1.65 HP motor is too much for a vacuum, I guess I could adjust the Jandy
valves so that, say, half the water is coming from the main drain & spa,
while the other half is coming from the vacuum port (or whatever ratio makes
I'm kicking myself for not having added a "T" fitting into the filter pump
setup - but I could still add that as I think I only need PVC plumbing and
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