- (a) Force mains shall be constructed of ductile iron (DI), high density polyethylene (HDPE), or PVC material.
- (b) Force mains shall be treated as gravity sewers for purposes of foundation bedding and backfill requirements.
- (c) PVC pipe used for force mains shall be certified by its manufacturer as conforming to the ASTM D2241-24 or ASTM D1785-21a standards, available as noted in Appendix B.
- (d) HDPE pipe used for force mains shall be certified by its manufacturer as conforming to the ASTM D3035-22 or ASTM F714-24 standards, available as noted in Appendix B.
- (e) If DI pipe is used in an environment that could cause corrosion or other deterioration of or damage to an iron pipe, or otherwise reduce the typical life expectancy of the pipe, such as might occur with certain soil types, low pH levels, or water conditions, the pipe shall be protected against corrosion, such as with cathodic protection.
Source. (See Revision Note at chapter heading for Env-Wq 700) #8590, eff 3-25-06; ss by #10693, eff 10-15-14; ss by #14258, eff 7-1-25, EXPIRES: 7-1-35