Thanks for the weather data, interesting the ground temperature I
guessed 80 before.
You obviously get higher RH than 20, it just must coincide with the
lower temperatures at night or first thing in the morning. Dewpoint
seems to have peeked at two days at 70 and one day at 71 this year.
at your elevation the 106F at 40% is a dewpoint just shy of 77F. I have
some worst case humidity data for there, but it shows nothing close to
that. Maybe early in the morning when the temp is lower perhaps you
would be seeing 40.
Maybe higher RH at lower temps during the monsoons
I dare you to plot and prove what you calculate. Scan it as a jpeg and
give a link on your site.
Plot the process on a pyschrometric chart, should be a simple matter to
be able to plot and use the standrard pyschrometric equations to back
up your goldbergesque calculations.
Sounds like the pool pump is indeed sucking air; I would guess from a
leaking gasket or o-ring.
Just clean out all the gravel you can by hand, backflush / clean the
filter assembly, and replace any o-rings you come across on the low-side
of the pool pump.
Forgot to ask - do you have the optional "Debris Containment System" for
the Pool Valet? If so, check to be sure that the air leak isn't
Do you see bubbles in the clear tank at the pool pump when it is
A- Do not have debris containment system for pool valet. I called the
mfg of pool valet and they indicated to me, based on my description of
the problem, that the problem was not part of the pool valet system.
B- I can see water movement, but not bubbles per se, in the window of
Certain kinds of filters provide a valve that allows you to flush out
the filter by running water backwards through it and then out the drain.
Other filters (such as the cartridge type) don't have this ability and
you have to remove the cartridges in order to clean them. Check your
owner's manual or the web site for the filter manufacturer.
The C-750 is a large (75 sq ft) cartridge filter that I think is now out
of production. You may be able to find a similar filter assembly on the
Haywardnet.com web site. You definitely need to remove and clean the
cartridge if you pool service company hasn't been doing this....in which
case your system pressure must be off the charts by now.
Who replaced the pump and filter? If you did then your on the hook. If one
of the contractors did then I think they are on the hook.
Just how did you take the filter out? Paper filter?
Get a new basket, of the proper manufacture. The right basket saves the pump
from stray trash.
Sucking air is pretty easy to find start looking at all of the joints where
the new equipment was installed. Saran wrap or similar wrapped over the
joints TIGHTLY will help ya find the leaks.
Oh the "the hole in the ground where all the money goes"
Thanks for the reply and suggestion.
We replaced the filter cartridge with a new one 6 weeks post-diamond
The maintenance company installed the pump (the old one was nearly 14
years old!) about the same time.
Please explain how to use Saran Wrap to detect leaks. Sorry for asking
a totally bone-head question, but I'm new to the whole swimming pool
ownership (and related expensive maintenance) experience.
you can not finger out how to wrap a piece of plastic around the joint?
Replacing the filter 6 weeks ago and you do not know how to back flush?
No wonder the pool is dirty. There is a valve on top that you turn when the
motor is off.
When I had my pool resurfaced I was back flushing 2-3 times a day for the
Proably do not have a pressure guage either.
Time to go to the pool store and learn or pay someone to do it for ya.
Thanks for this input and put down. Guess I needed that.
I thought I could hire someone to take care of the pool as I am on the
road a lot.
Boy, was I wrong!
I'll go outside NOW and wrap plastic around the joints and see if that
When the pool was resurfaced, I was out of the country for 3 weeks on a
job, so missed the opportunity to learn about the pool from the
contractor and relied on the service provider to take care of
everything for me.
My filter is a paper cartridge. The 'silo' has a pressure gauge on the
I'll try to go to a pool supply store tomorrow and see if they can talk
me through some of the basics.
You should have no leaks at all. On advice by good old
Sam at the pool store I have no leaks since (a) replacing
friction fittings with screw fittings, (b) using Teflon plumber's
tape on each male screw part (6 turns over the threads plus
three more at the end of the threads.) This is how components
of an above-ground pool are assembled every May (disassembled
in October or November.)
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