Rule 15-18-77-5.7.8 - Minimum Specifications for Irrigation Equipment1. Sprinklers, valves, controllers and all other equipment used in a spray irrigation system shall be designed, manufactured and warranted by their manufacturer for use in effluent disposal systems.2. Sprinklers must be of low trajectory type designed to reduce aerosols. Low trajectory spray sprinklers have a nozzle trajectory equal to or less than thirty (30) degrees. 3. Sprinklers shall be connected to their supply line by means of polyethylene (PE) pipe or a swing joint manufactured specifically for this purpose.4. Radius reduction by means of nozzle retaining screw, distance control diffuser pin or other similar devices shall not be allowed.5. Impact and pop-up sprinklers may be used. Sprinkler risers greater than twenty four (24) inches in height must be braced.6. Equipment susceptible to freezing must be adequately protected to prevent freezing.15 Miss. Code. R. 18-77-5.7.8