My friend works as a mechanic at a factory, recently took a part-time job, working as a plumber in the evenings. He took this step not from a good life, he has a mortgage on his shoulders, but loans. A wife and two children. He has no special plumbing experience. Therefore, he periodically turns to me for advice (I have experience in this specialty).
He had a situation: in the building that he serves, the riser periodically "stops". The liquid that must enter the two receiving wells on the street sometimes stops taking. It usually clogs between the first and second. From this, the pressure of the liquid column in the sewer increases and knocks out (disconnects) the bends at 45 ° and 90 ° in the basement. Which results in rivers of slurry and amber spreading throughout the building.
I suggested to him to solve the blockage problem by such methods:
- Find out if there is a counter-slope between the building and to the receiving well, from this the pipe is silted up, because solid particles and fat like to settle in such areas. In this case, order high-pressure hydraulic flushing with special equipment, and if flushing helps, but for a short time, then change the site in compliance with all slopes. To which he objected: The reason for the blockage is drowned hygiene products, rags and all kinds of waste. Definitely not a counter bias.
- Install a non-return valve to allow fluid flow in one direction only. If the well overflows, the pressure will possibly disconnect the fittings and the valve will prevent fluid from returning to the building. At least the unpleasant flood will be less. "Not a bad option, you need to think about it.", said a friend.
- Install additional fasteners, supports. "Dead" if possible. Buddy: The place is not convenient there, it will be difficult to fix the supports.
Buddy: Or maybe it’s him, now I have a dozen self-tapping screws in my pocket, I’ll twist them at the junction of the pipe with the socket. And the problem will be solved by itself?
My answer: No, you can't. The pipe tends to expand, lengthen when heated. Excess lengthening goes into the fittings, it is necessary to keep their mobility so that the system works correctly. In addition, self-tapping screws will aggravate the situation, the protruding "pin" inside the pipe will take on the function of a hair retainer, which will lead to repeated blockages and so on the incense of the breathing system. In addition, the self-tapping screw quickly corrodes from the slurry.
As a result, he wore out, but still installed additional clamps. From this, the receiving wells began to fill up with a blockage and the problem was already solved by the water utility, with its operational teams.