Distribution of domestic sewage into private sewage disposal systems by low pressure pipe (LPP) systems as required by this section shall be designed to minimum requirements, as follows:
A) Pretreatment of effluent shall include an effluent filter for septic tank effluent.
B) Minimum supply/manifold line diameter shall be two (2) inches.
C) Minimum lateral domestic sewage distribution pipe diameter shall be one and one-quarter (1 1/4) inches on trenches fifty (50) feet or longer. On trenches less than fifty (50) feet long, the minimum pipe diameter shall be one (1) inch.
D) Minimum perforation size shall be three-sixteenths (3/16) inches.
E) Minimum distal end pressure on any lateral line shall be one foot (1') of pressure head (.43 psi).
F) The discharge rate of distribution lines shall be a minimum of .10 gallons per minute per lineal foot (10 gpm for a 100' line), and shall be equal among all distribution lines to within plus or minus five percent (5%).
G) The minimum dosing volume is the sum of the supply line volume and 5 times the volume of the lateral lines.
H) The configuration of an LPP distribution system shall be such that the number of fittings is minimized.
I) Only deep socket high pressure fittings shall be utilized.
J) Construction shall comply with all other applicable sections of the Ordinance.
K) Low pressure pipe distribution systems shall otherwise comply with the requirements of Design and Installation of Low Pressure Pipe Waste Treatment Systems as incorporated by Appendix A.
(Ord. O-201711-51-031, passed 11-14-2017)