No, there is root killer available that is copper sulfate crystals. It is supposed to kill the roots and not hurt the tree.
If you could keep the salt in there yes, the problem is that it washes out as soon as you put it in there so no it would not keep roots out of the sewer line.
Yes, but make absolutely certain that you check your city/town/local ordinances as to what can be flushed into the line. Some municipalities do not permit flushing certain chemicals (hazardous) into a sewer line.
Most sewer lines do not run perfectly straight, also, you would not be able to get it into the main because there is an elbow where it connects. You can put copper sulphate down the line to kill the roots. Do it a couple of times a year.
Yes, it will. Paint of any kind should never be put down a sewer line. If you are on septic it will kill the aerobics in your tank.
You may have roots that have penetrated your sewer line. If you have a septic system it may be time for pumping and an inspection of your system. I am going with tree roots breaking into your sewer line though.
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Root damage can cause extensive damage to your home itself. Once the sewer lines have been compromised, many problems can occur within the home. The water supply can be interrupted and floor drains and toilet can back up, potentially causing flooding or damage to appliances. No type of sewer line is immune to roots. Clay pipes, the most common kind of pipe in older water and sewer systems, are the most susceptible to root damage. Roots will penetrate any crack, hole, or poorly sealed joint in a sewer line. Concrete and PVC pipes are less susceptible to root intrusion but are not root-proof. Once roots penetrate the line, they can exert considerable pressure on the pipe, which then must be repaired or replaced.
With a sewer line locator of course
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