US lawMassachusettsRegulations310 CMR — Massachusetts Department of Environmental Protection310 CMR 15.00 — State Environmental Code, Title 5: standard requirements for the siting, construction, inspection, upgrade and expansion of on-site sewage treatment and disposal systems and for the transport and disposal of septage15.233310 CMR 15.233SiphonsYear: 2026Length: 12 wordsOfficial source The use of siphons for on-site systems, including shared systems, is prohibited.Previous310 CMR 15.232Next310 CMR 15.240