Conventional pressure distribution system means an on-site sewage system consisting of a septic tank and a subsurface soil absorption system with pressure distribution of the effluent. Design, operation and maintenance, and performance monitoring are described by "Guidelines for Pressure Distribution Systems" by the Washington state department of health.
Conventional pressure distribution system means an on-site sewage system consisting of a septic tank and a subsurface soil absorption system with pressure distribution of the effluent.