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Maznek Septic

Serving the septic needs of south-central New Hampshire

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(603) 471-1415

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Why Do Sewer Lines Freeze?

March 26, 2015 by Larry Maznek

Sewer lines should be installed with a pitch to them, (minimum one eighth inch per foot), pitched toward the septic field in a gravity system, but pitched toward the pump chamber in a pumped system. If the pipe gets flattened out, pushed downward, or a root pushes the pipe up to level or stretched in a certain area, it will cause the water to puddle in that area (moving water is less likely to freeze; for example, a stream versus a pond or a river versus a lake).

Once the water starts to freeze it will expand out and up. When more water comes along and backs up behind the small clog, freezes, and expands still further and clogs the pipe even more, it will eventually plug up the pipe.

In a pumped septic field, we install a weep hole in the line inside the pump chamber to let whatever effluent that does not make it up to the septic field during the pump cycle, to drain back out of the line. If the weep hole plugs up for whatever reason, the line will remain filled with effluent, and make the line more susceptible to freezing!

Usually sewer lines are installed between at least one to two feet below the ground surface. Grass and snow help to keep severe cold from driving the frost too far into the ground; normally the two combined are sufficient to keep the frost to only a few inches into the ground.

Pipes that are under walkways, and driveways should all ways be insulated in the cold climates, but we don’t usually insulate them under the lawns. Keep the snow over the sewer lines and the leach fields that are not under the drive and walkways, to help keep them from freezing!

Filed Under: Septic Care

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From Our Clients

Larry Maznek is different from other septic companies. He makes sure your septic is working properly and does a thorough examination each and every time he pumps.

Dan B.

Maznek Septic fixed our septic issue the day before we left for vacation so we could go. And they fixed work another company did poorly which was the cause of the system failing. Thanks so much, great job!

Ken F.

Trace is a hard worker, professional and personable. He performed a septic inspection for me when the ground was pretty well frozen. Highly recommended!

Jared A.

I called up Maznek Septic late at night and they were there first thing in the morning and fixed the blockage. Thank you Larry!!!!

Paul C.

Maznek Septic has been pumping our septic tank for the last few years. I am very impressed with Larry’s knowledge and professionalism, and I plan to continue using his services.

Dave W.

Location

Maznek Septic Service LLC
41 Wendover Way
Bedford, NH 03110
(603) 471-1415

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41 Wendover Way · Bedford, NH 03110