Laserfiche WebLink
than 4 inches from edge of paved areas. <br />c. All sprinkler heads shall be installed with swing joints or Rainbird swing pipe and fittings <br />or Toro funny pipe and fittings to allow for adjustment of the head and finish grade <br />settling. <br />i. A swing pipe assembly shall consist of a minimum of 12 inches of swing pipe <br />with fitting adapters at each end threaded into the circuit pipe fitting at one end <br />and into the head at the other end. <br />ii. A swing joint assembly shall consist of two street ells joined at one end of a <br />1/2-inch x 12 inch PVC Schedule 80 nipple and one street ell attached to the <br />other end and threaded into the circuit pipe fitting. <br />E. Wiring: <br />a. All wire runs should be installed with no splices between the controller and the remote <br />control valves. If splices must be utilized, they should be kept to the minimum number <br />possible. <br />b. All splices at the control valves shall be installed with appropriate electrical splice <br />connection protection. <br />c. All splices at locations other than the control valves shall be installed with appropriate <br />electrical splice connection protection and installed in a 6 inch round box for ease of <br />locating. <br />d. Splices shall be 3M Company, DBR & DBY Connectors for conventional controllers and <br />DBR-6 & DBY-6 Connectors for Two-wire controllers. <br />e. Provide 12" expansion loops in wiring at each wire splice (other than the remote control <br />valve) and at each change of wire direction. <br />f. Provide a 24" expansion coil for each wire at each remote control valve and where <br />each wire enters the controller conduit. Each 24" expansion coil shall consist of 6' of <br />wire coiled around a 1/2" piece of pipe resulting in a 24" long coil. <br />g. Control wiring shall be run into the controller in a separate conduit from all power <br />supply wiring and at least 10 inches apart if both are run in the same trench. <br />F. Setting of Valves: <br />a. All valves, quick coupler, master and electric remote control shall be located in the <br />landscaped planter areas. In no case shall a valve be located beneath a paved <br />surface. <br />b. Master and electric remote control valves shall be installed in a level position only. <br />c. Master and electric remote control valves shall be installed in a minimum 11" x 16" or <br />larger plastic, rectangular, marked valve box. In no case shall more than one electric <br />remote control valve be installed in one box unless a large, 18" x 24" or larger <br />rectangular valve box is used. <br />d. Quick coupler valves shall be installed in a 6" round plastic valve box with the top of the <br />quick coupler valve as close as possible to finish grade as the valve box installation will <br />allow. <br />e. A minimum 2 cubic foot gravel pit shall be installed under each master, electric remote <br />control valve, and quick coupler valve with the top surface of the gravel pit at least 2" <br />below the bottom of the valve. <br />f. A master valve shall be installed immediately after the backflow preventer to allow <br />pressurization of the irrigation system only when the controller cycles to operation the <br />irrigation stations. The master valve shall be the same size as the main line as <br />indicated on the irrigation plans. The master valve shall be energized by the master <br />valve circuit located in the controller. <br />G. Sleeving: <br />a. Furnish and install PVC sleeving where control wires or pipe pass under paved <br />surfaces as follows: <br />i. Of adequate size to allow retrieval for repair. <br />ii. Extend 12" beyond the end of paving at each end. <br />iii. Have a 4" bed of sand backfill above pipe.