Yesterday we had to free the approx 100 foot main sewer pipe out to the connection to the municipal sewer in the street. Our connecting pipe is four inch inside diameter plastic. It is about 8 feet deep; the pipe exiting below the footing of our concrete basement wall which is 8 foot high (plus a six inch footing). The concrete wall only 'shows' above ground by some six to eight inches. Our basement is therefore almost completely 'in ground'. There appeared to be two blockages; one a few feet out from the house, possibly at the location of an underground 45 degree horizontal bend in the pipe. The other almost 100 feet out to the main sewer. This second blockage may have been an accumulation of waste due to the first blockage possibly only allowing a trickle to escape. The problem however appeared to occur rather suddenly! The vigorous application of a 100 foot flat steel 'snake' was successful in freeing things up. This is only the second blockage we have had in some 39 years. The other one being some 20 years ago and due to an accumulation of too much fat from cooking and draining numerous Christmas turkeys for the local parish etc.! Questions:
1) We have a lot of trees. Is it likely that roots could go that deep and get into the sealed pipe? We had another problem with tree roots in a land drain, last year. but that drain was only about 1.5 feet deep and some 100 feet distant from this one. 2) Would the frequent application of coarse salt to the sewage pipe help to kill or discourage he growth of tree roots; if that is the cause? The municipal sewer outfall in this instance, after minimal treatment, is directly into the salt water ocean. Any comments/advice much appreciated- posted
14 years ago