Louisiana Administrative Code
Title 51 - PUBLIC HEALTH-SANITARY CODE
Part XIV - Plumbing
Chapter 16 - Mobile/Manufactured Homes and Mobile/Manufactured Home Parks [formerly Appendix C - Mobile/ Manufactured Homes and Mobile/Manufactured Home Parks]
Section XIV-1613 - Park Drainage System

A. The sewer main and sewer laterals shall be installed in a separate trench not less than 5 feet (1524 mm) from the park water service or distribution system. See §613. C and 613.D of this code.

B. The minimum size of pipe in any mobile/manufactured home park drainage system shall be 4 inches.

C. Each mobile/manufactured home shall be considered as 15 fixture units in determining discharge requirements in the design of park drainage and sewage disposal systems.

D. Minimum grade(S) for sewers shall be so designed that the flow will have a mean velocity of 2 fps (0.6096 m/s) when the pipe is flowing half full.

E. The discharge of a park drainage system shall be connected to a community sewerage system. Where a community sewerage system is not available, an approved commercial treatment facility or an individual sewerage system shall be installed in accord with the requirements of LAC 51:XIII (Sewage Disposal).

F. Manholes and/or cleanouts shall be provided and constructed as required in Chapter 7 of this code. Manholes and/or cleanouts shall be accessible and brought to grade(G).

G. When located in a mobile/manufactured home park (i.e., other than a single mobile/manufactured home on its own lot), t he sewer main shall be provided with a minimum 4-inch vent, not more than 5 feet (1524 mm) downstream from its upper trap. Long mains shall be provided with additional relief vents at intervals of not more than 200 feet (61 m) thereafter. These relief vents shall be a minimum of 4 inches and shall be securely supported and extended a minimum of 10 feet (3048 mm) above grade(G).

H. Branch lines or sewer laterals to mobile/manufactured homes shall be not less than 4-inch diameter.

I. Sewer inlets shall be 4-inch diameter and extend above grade(G) 3 to 6 inches (76 to 152 mm). Each inlet shall be provided with a gastight seal when connected to a mobile/manufactured home and have a gastight seal plug for use when not in service.

J. Each mobile/manufactured home site shall be provided with a trailer trap. Sewer laterals over 30 ft (9144 mm) from the main park drainage sewer shall be provided with an individual vent and shall also be provided with a 4-inch cleanout brought to grade(G). When an individual vent for the sewer lateral/trailer trap is required, it shall be 3-inch minimum (upstream of the clean out fitting) and shall extend not less than 10 inches above the roof of the mobile/manufactured home.

K. To provide the shortest possible drain connection between the mobile/manufactured home outlet and sewer inlet, all sewer inlets should terminate in the rear one-third of the mobile/manufactured home as placed on the site.

L. Drain connections shall slope continuously downward and form no traps. All pipe joints and connections shall be installed and maintained gastight and watertight.

M. No sewage, waste water, or any other effluent shall be allowed to be deposited on the surface of the ground.

N. Testing the Park Drainage System. Upon completion and before covering, the park drainage system shall be subjected to a static water test performed in accordance with §319. A and 319.B.1 of this code.