Joined
·
538 Posts
how reliable is a piece of four inch pvc sleaved into a piece of six inch terra cotta? how long before roots make the invasion?just curious....:thumbsup:
Depends on which side of the line he is tying into, uphill or downhillThis constitutes a reduction in pipe diameter which is a code violation everywhere.
As for roots I don't imagine that would slow them at all.
If the pipe is properly put together in the first place, then roots should not be a problem, except if you check your code, I think you will find that all underground gravity sewers must be graded for fall and bedded properly. I can't see how you can properly bed it without a grout injection afterwards. I would also insist on bell end pipe for that portion of the installation.
Also, if I were the homeowner, I would require a wet video inspection of the installation with a 360 degree interior view of all sleeved joints. This is to ensure there are no bellys in the pipe and that it is not holding water at any point. I doubt that clay is still on grade after all these years, but its possible.
Killer, I'm not knocking salt glazed clay tile pipe, I kinda like the stuff, personally. In our soils in this area, we have trouble with the short joints bellying at the bells because of improper compaction and improper bedding over time. Its a matter of workmanship, not material failure.We use nothing but clay sewers in Chicago, from building sewers to city mains, they work just fine when you bed them properly. Now I realize that plastic is the current material of choice, but don't discount a system that has worked just fine for a hundred years, it has passed the test of time.
When you say "he" you meen you inspector wants to put a piece of 4" inside the 6"?No. He wants to put a 4" pvc "sleeve" inside a 6" terracotta pipe. Presumably as a patch for a section of broken terracotta?
Most sewer work is done by the city actually, individual homeowners responsibility ends at the sidewalk. All sewers have to be laid in a bed of bank sand not less than ten inches deep, and compacted, and then backfilled with twenty four inches of bank sand and compacted again, then you can fill to grade using stone free earth.Killer, I'm not knocking salt glazed clay tile pipe, I kinda like the stuff, personally. In our soils in this area, we have trouble with the short joints bellying at the bells because of improper compaction and improper bedding over time. Its a matter of workmanship, not material failure.
I know its used almost exclusively in some parts of the country with great success. I'm just not a fan of how some folks installed it here in the past.
and most of the pipes with broken bells or root invasion do not have ne bedding and are seriously settled or misaligned over time...Most sewer work is done by the city actually, individual homeowners responsibility ends at the sidewalk. All sewers have to be laid in a bed of bank sand not less than ten inches deep, and compacted, and then backfilled with twenty four inches of bank sand and compacted again, then you can fill to grade using stone free earth.
__________________