Wondering if anyone has any insight into good method and material for filling an existing gravity side sewer pipe that is sloping the wrong way, but that is going to be used as a sleeve for the pressure line that is being installed to carry the effluent from a grinder pump. The primary thought is to ensure that we're not picking up flow from the main and running down into the sewer stub or just letting a bunch of sewage sit in the 6-inch stub surrounding the 1-1/4" gravity pipe until the end of time.
Thanks for your input.
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