The problem is that the roots penetrate the joints, not the pipes
themselves. The pipes might be made of cast iron, plastic, clay, or even
cardboard (yes, there were sewer lines made of cardboard and tar). Cast
iron *is* the most expensive (and required for commercial buildings) but
it will have the same problems with tree roots as plastic does.
Roots seek out water in sewer. Poison the water supply, no more
roots. Copper based paint compounds where once used as anti-fouling
coatings on the underside of boats. (Very effective, but that use
mostly banned for being too toxic).
Once sewer is opened and before your sewer line get's clogged up
again. Try some root kill, copper sulphate (blue) crystals, available
at Home Depot. Start off with large treatment, 1/4 bottle in clean
out, and a dissolved cap full each time you clean toilets.
Note: Keep toilet lid closed while dissolving CuS04 poison. Add
drop or two of liquid dishwashing/hand soap and you can use the
combination to replace commercial toilet bowl cleaner. Time the flush
of cleaning solution will have maximum time to work on tree roots
before being diluted by other household water use.
It keeps a nearby Strangler Fig (tree) out of my sewer line. :-)
Only if YOU think it's time. As Speedy Jim suggested, you need to
weigh the cost and inconvenience of the cleanings with the cost to
replace the line. And the replacement will NOT guarantee that you
won't have future problems of some sort...unless, of course, the
contractor will give you such a guarantee.
You know what the problem is...roots. You don't need a video
inspection for this. Don't waste the money on one.
The biggest cost is gonna be in the labor. It doesn't make any sense
to not spend a couple of bucks more for newer and more
Investigate this more...including warranties. It may well be a cheap,
dependable solution to your problem.
Contact your city sanitary engineering department to get their opinion
and...if for no other reason...to see if its allowed. They may even
have a list of certified contractors that do this kind of work.
Have a nice week...
Cat...the OTHER white meat!
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