Calcium Deposit in sewer pipes
I am staying at my parents home and some of the plumbing they have is 56 yrs old, specifically the bath tub drain pipe that leads to the septic field. They live in the country and have HARD water. They do use a water softener.
I have long hair and it has only taken a few weeks for the drain to clog to the point that it's taking almost an hour to drain the tub after a shower. We have been using Drano treatments to loosen the scale and it hasn't worked. We are considering using Liquid Plumber tomorrow (the one that has two parts that mix together first). We tried putting down a snake to loosen the pipe clog and my husband said he couldn't get it further than 6 feet but could feel a buildup of scale along the pipe as he used the snake.
Should we use Liquid Plumber? We also have to keep in mind that this is draining out into a septic field; it's now winter here and below 0*F so we don't want to do anything that would cause a slowdown of proper functioning of the septic field. Is there something more environment friendly that can be used besides replacing the old pipes?