Once in a while, I have need to clear a clogged drain line
from an AC unit. Now, is one of those times. I've got a
maybe job. We'll know in a couple days if I have the job or
not. Big system, 8 ton unit. The building has a couple 12
ton and five eaches 8 ton AC. The drain line is about an
inch or 1 1/4 inch copper, with a vertical open top tube to
pour in some cleaner, or insert a blow gun tip. The drain
which is clogged is about 10 feet long, with maybe 3 elbows
invovled. Drains onto a rolled black rubber roof, so I'm not
eager to use chemicals.
Compressor and blow gun tip comes to mind. What other
options are there? My parts house has a little thing with a
carbon dioxide cylinder. Wonder if that's big enough.
Back in the good old days, we'd use a tank of freon to blow
it out. That's no longer done, of course.
Easy enough to find out.
Portable compressed air tank is another possibility.
Another possibility is prevention: You can spend more than pocket-change to
buy these anti-biologic pellets to drop in the condensate pan (they last for
a season) or dump a cup of bleach in the same pan.
I havn't really looked, how dificult it is to get to the
pan. But, bleach is an idea. Make the whole church smell
like a swimming pool. I think I better think it out again.
Tablets are sounding better.
Bleach in the drain would likely not make the church stink.
On Mon, 17 Aug 2009 10:12:51 -0400, "Stormin Mormon"
If you can get a garden hose up there, use a drain king. It's a
rubber device you attach to end of hose and slide into end of pipe.
When you turn on the water, it first expands to seal against the sides
of the pipe, and then releases water pressure into the pipe.
I've used them many times to clear undersink drains. Works like a
charm. Come in different size ranges.
I have a couple of interesting gadgets that Johnstone used
to carry. The things are machined aluminum holders for the
small CO2 cartridges and have a 3/4" male pipe thread on
one end with a pair of small holes. You insert a CO2 cartridge,
screw the adapter on to the pipe, then twist the holder tight
which punctures the gas cartridge. It works fairly well for
I considered a sink drain snake. But, the access opening is
about 7 feet of the floor. I'd have to rope up a step
ladder, and not sure I've got enough space to open up a
ladder. I'm going to be standing on a stepstool reaching
towards the sky, as it is.
I'll have to ask about the brush rig, that could be useful.
1) I don't have permission to replace the drain
2) drain is betwen the air handler and the wall
3) would need a hammer drill to make a two inch hole through
4) Wasps can nest in a two inch pipe, also
I saw that drain blower, from Johnstone. The cartridges are
about two bucks each. But, it's a lot lighter than an air
compressor. I could much more easily carry it up the ladder,
My plan at the moment is to use small compressor, length of
air hose, and a blow gun. Stick the blow gun into the clean
out, wrap with a towel, and squeeze the handle. Some of the
air will of course blow into the pan. But, much should blow
down the length of the drain. The drain is huge.
I'm wondering if wasps have nested in the open end. Need a
big nylon sock or something to keep the wasps out.
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