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Clavin

05:58AM | 08/26/05
Member Since: 02/10/04
4 lifetime posts
Bvplumbing
Have sched 20 waste line from house to main. Cracked. Have to replace section from iron drain leading out from house to existing section of 'good' line.

>PROBLEM: No PVC fittings to join size 40 to 20. Sched 20 pipe is twenty years old and has become slighly oval with dirt weight. Have used rubber 'gasket'/'band' and steel adjustable clamps, with PVC glue (purple stuff) but still leaks like a sieve.

>PROBLEM2: Flared rubber joint with metal adjustable clamp joins new 40 PVC to iron drain from house - also still leaks.

>PROBLEM3: Old sched 20 pipe has tree roots slowing drain/clogging. (know from previous snaking)

>>BETTER TO SPEND $3K TO REPLACE ALL 75FT TO SEWER MAIN, OR IS THERE A WAY TO STOP LEAKS? ALSO, IS IT WORTH IT TO SPEND THE $200/300 TO SNAKE TO BUY ME SOME TIME OR WOULD SCHED 20 BE TOO COMPROMISED BY ROOTS??

Billhart

07:16AM | 08/26/05
Member Since: 04/25/05
1915 lifetime posts
I am not that familar with all different types of piping, but the only sch 20 I have seen has been for central vac systems.

There is a special sch 30, 3" pipe that is sometimes used for vertical drops because it will fit in a 2x4 wall.

Other than that all interior DWV is sch 40.

For inground drain pipes there are 3 different ones used.

Sch 40

SDR 35

Drain & Sewer Pipe (ASTM D-2729)

You might have one of the later.

The SDR35 and D&S have a smaller OD than sch 40.

There is an adapter that will go sch 40 to D&S (or SDR35).

The local ***** has it, but if you can't find it go to a plumbing supply store.

But a couple of things.

Is the sch 40 PVC or ABS, the ABS will be black and uses different techniques.

"Have used rubber 'gasket'/'band' and steel adjustable clamps, with PVC glue (purple stuff) but still leaks like a sieve."

The puple stuff is NOT A PVC ADHESIVE. It is a PRIMER/CLEANER and you need to follow it with a PVC ADHESIVE.

BUT you should not use either with a rubber coupling.

And the rubber couplings comes in number of different versions depending on the specifics of what is being joined. Make sure that you have the correct one.


Clavin

07:38AM | 08/26/05
Member Since: 02/10/04
4 lifetime posts
existing waste line was replaced 20 years ago with sched 20 (standard at time). Now, standard is sched 40 4" PVC (white).

Question is how to replace cracked sched 20 with length of sched 40 PVC. No PVC fittings made to fit 40 on one end and 20 on other - thus the attempt with 2 part PVC ashesive (purple then clear) and rubber sleeve with clamps.

All these options were discussed at length with a local home center chain reprentative before coming up with these as the best options.

Needless to say, didn't work, thus my posting here.

>worth snaking to clear out roots?

or

>replace all 75 feet of sched 20? Estimates have been coming in at $3k - $3.5K Yeesh!!

Billhart

08:06AM | 08/26/05
Member Since: 04/25/05
1915 lifetime posts
What is a "local home center chain reprentative".

Most of the clerks have a hard time finding the break room. But there are a few that are retired tradesman. But the luck of the draw is often against you.

Expose a section of the pipe to find the markings on it to see if it is infact sch 20 or if it is D&S.

Then go to a plumbing suply store.

">worth snaking to clear out roots?

or

>replace all 75 feet of sched 20? Estimates have been coming in at $3k - $3.5K Yeesh!!"

No way of knowing from what you have given.

Do you know if you have roots in the line?

And do you know that the line is not colapsed?

If you get some one out get some one that have a video system so that you can inspect the line.


doug seibert

04:53PM | 08/26/05
Member Since: 08/10/02
842 lifetime posts
http://www.sewerhistory.org/articles/compon/orangeburg/orangeburg.htm

.....Tree roots love orangeburg......I apply an annual copper sulphate treatment.......
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