Specifications include, but are not limited to: 1.New Double Check Valve Assembly (Backflow Preventer) seizes 1”-2”: Furnish and install new double check vale assembly at locations shown in bid drawings. It shall consist of 2 positive seating check modules with captured springs and rubber seat discs. The check module seats and seat discs shall be replaceable. Service of all internal components shall be through a single access cover secured with stainless steel bolts. The assembly shall also include two resilient seated gear operated slow close isolation valves and 4 resilient seated test cocks. The assembly shall meet the requirements of ASSE STD 1015 and AWWA STD C510 and shall be approved by the foundation for Cross-connection control and hydraulic research at USC. Assembly shall be UL Classified and FM approved for 1”-2”. The assembly shall be rated for a max working pressure of 175 PSI and Temp Range of 33 F –140. It shall have (2) pre-wired tamper switches (1 per shutoff valve). Assembly shall be AMES fire & Waterworks Series 2000B-FP2.New Double Check vale assembly (Backflow Preventer) size 4”:Furnish and install new reduced pressure principle backflow prevention assembly at locations shown in biddrawings. It shall consist of low head loss compound check valve and 2 grooved end butterfly valves with integral supervisory switches. The main body and access cover shall be epoxy coated ductile iron (ASTM A536). The seat ring and check valve shall be noryl, the stem shall be stainless steel (ASTM A276) and the seat disc elastomers shall be EPDM. The checks and relief valve shall be accessible for maintenance without removing the device from the line. Assembly shall be UL classified and FM approved for 2-1/2”-10”. The assembly shall be rated for a max working pressure of 175 PSI and max working water temp of 140F. It shall be furnished with air gap fitting. Install air gap on new CU drain line & route to Nearest FLR Drain as per detail. Assembly shall be Zurn Wilkins Model 375-BG-AG or approved equal watts/ames3.New Indicated type Bronze ball valves:Furnish and install new FM-Approved & UL-listed, indicating type ball Valves at locations shown in bid drawings. The shall be 300 PSI rated, Full port, threaded, rated for fire protection service. All bronze body construction with chrome plated brass ball and silicon bronze stem, multi-turn actuator. It shall have factory installed & Prewired tamper switch. NIBCO model-KT505-W-8.