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i <br /> Sprinkler heads in low points must incorporate a positive 2-way check valve device to prevent <br /> low head puddling and eateanal seepage inW the system if pressure is reduced or off. ' <br /> 4.2.3 Quick Couvlers <br /> The new uick cou lers shall match the desi and uali of the eatistin irri aon s stem uick ' <br /> 9 P Sn q h' S 8a Y Q <br /> couplers. This will enable use of the ezisdng coupler keys and heads in the new system. ' <br /> 4.2.4 Gate Valves <br /> All valves installed for isolation pucposes shall be of gate type caistruction allowing a full , <br /> diameter opening d�rough the valve when in the full open pc�sition. The valves shall be line size <br /> unless otherwise note�. Gate valves shall be bronze as manufacwred by Waus Regulator GV ' <br /> Series or approved equal. All valves shall be installed in valve boxes with coveas to provide easy <br /> access and location. <br /> 4.2.5 Electric Control Valves 1 <br /> Electric control valves shall be 2-inch Toro Model number 252-26-08 or approved equal. The ' <br /> valves shall be angk type,with a manual flow control lrnob,stainless steel seat,fabric reinfom,e� <br /> diaphragm,and 241ong inch lead wires. All valves shall be installed in valve boxes with covers <br /> co pmovide easy access and locadon. , <br /> 4.2.6 Control Wirina <br /> Control wirin fo�the 24 V.A.C.rec�te control uri ' valves shall be ' e strand , <br /> 8 8� � �PP� <br /> wire with UF Polyethylene insuladon rated for a minimum of 300 V.A.C. All control wiring <br /> shall have a soft drawn single stiand copper conducmr of d�e gauge specified below. , <br /> Valve common wires shall be#14 AWG or heavier as required, with wtrite insulation. "Hor ' <br /> wires to the valves shall be#14 AWG or heavie,r as required, with red insuladon. These cola <br /> assignments shall be adhered to unless otherwise specified <br /> Splices shall be made using 3M cast splice or equal. ' <br /> 4.2.7 Controller ' <br /> The controller shall be a Toro Vision II Series Model 189-06-01 with Pedestal Mount 189-SO a <br /> approv�eqoal. The 12 station controller shall be enclosed in a lockable metal cabinet with an � <br /> intemal transformer. 'Ihe cabinet will be mountad outdoors coticealed witl� shtubs n� the <br /> location of the fumre visi�or center. , <br /> , <br /> TS-� ' <br /> ' <br />