On Sun, 20 Jan 2008 18:53:17 -0600, wrote:

On Mon, 21 Jan 2008 00:16:11 +0000, john
wrote:



you can get sched 40 PVC that is sunlight resistant that is used for
electrical, grey


Do they make that stuff in 4 inch size?

yes


you might put a lint trap towards the head end, in a place easy to
clean. one type, put a nylon stocking on the end of
the washer discharge hose, this goes into drain pipe, pull out
frequently and clean it could try the same with window screen pouch.
this pits it inside a warm environment.

could also put window screen over the end of the pipe as it goes into
coupler. clean frequently but it will be out in the cold.


Yes, I got to do something to stop that lint, at least in cold
weather. It's hard to believe that enough crud can build up in one
spot to cause a freezup of a 4" pipe. I suppose it builds up,
freezes, and just keeps building up more and more. After I broke the
clog with the hot water, I dumped a few handfuls of rock salt down the
tub drain to hopefully loosen up any other possible iceballs in there.

Thanks

On Sun, 20 Jan 2008 16:16:21 -0600, wrote:

I have a drain that exits my house for gray-water. It's a greenish
pvc. If there were numbers on it, they are long gone. This pipe is
just on the surface of the lawn. It drains the bathtub and wash
machine. This is legal out here in farm country. I have had this for
years. Once before it clogged and froze during a severe cold spell.
I have these pipes connected with Fernco couplers so it's easy to take
apart. There is about 45 ft of pipe draining downhill. I have
intentionally left it on the surface in case it does freeze. That way
it's easy to fix in winter.

Anyhow, this week it froze again during our severe cold. This time I
found one of the pipes had split. I unscrewed one of the ferncos and
pulled off the last 30 feet. I took a hose, connected it to the hot
water heater and shoved it up the pipe until the clog broke. Same as
last time, a lint clog. I just went to buy a new section of pipe.
They said this green stuff is schedule 35. The guy at the store did
not seem to know much, and said that this is not the right stuff, and
I need schedule 40. While the schedule 40 is thicker walled, and
cheaper, I thought that schedule 35 was sunlight resistant. I decided
not to buy anything until I know which is best to use in an exposed
situation. (either way I am still going to have the remaining 30+
feet of green pipe in use, since I am only replacing the bad section.

Which should I use?

Thanks