WAC 246-272C-0240. Additional requirements for pump tanks

(1) A sanitary tee or baffle is required when effluent is pumped into the pump tank. (2) The sanitary tee or baffle for a pump tank must meet the following requirements: (a) The inlet sanitary tee or baffle must be installed on the inlet of the pump tank; and (b) The inlet sanitary tee or baffle must extend into the tank a minimum of eight inches below the invert elevation of the inlet pipe.