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RepWars Briefing - Questions & Answers
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Question...
"What is the minimum burial depth for a 2" forced main sanitary sewer ?"
RepWars Reply...
The minimum depth of burial should be 6"-12" below recorded frost depth. A couple of good recognized sources for recorded frost depths can be found within NFPA 24 and ASHRAE publications. Also, it is always good practice to check with local code officials.
Pressure effluent lines may require more protection against frost than gravity lines because of their small diameter and the possibility of containing effluent at all times. If they are not installed below frost level, extreme care must be taken during their installation to prevent sagging and trapping of effluent. This will allow for complete drainage of the piping between pump cycles. Frost protection suitable for water service piping must be considered if the pipe does not drain.
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