Specifications include, but are not limited to: A. GENERAL REQUIREMENTS: i. All backflow devices and parts shall have a minimum warranty of one (1) year against defects in materials and workmanship. ii. Models listed below shall not be substituted without authorization from the City. All requests must be received in writing, to the Procurement Analyst listed on page one (1) of this solicitation, no later than October 09, 2023, at 5:00PM Local Time, in order to be considered. No exceptions to the deadline will be considered. B. DOUBLE CHECK VALVE (DCV) 3/4”- 2” REQUIREMENTS: i. The assembly shall consist of two (2) positive seating check modules with captured springs and rubber seat discs. ii. Seats and seat discs shall be replaceable. iii. The assembly shall have top entry access with screwdriver slotted test cocks. iv. All rubber elastomers shall be of chloramines resistant material. v. The assembly shall comply with state codes and standards, requiring reduced lead content. vi. The assembly shall meet the requirements of: NSF (formerly National Sanitation Foundation) / American National Standards Institute (ANSI) 372, American Society of Sanitary Engineering (ASSE) 1015, American Water Works Association (AWWA) Std. C510 (less ball valves allowed). vii. Accepted models: Ames LF2000B, Apollo / Conbraco DC-4ALF, Watts LF719, Wilkins 950-XLT2 or city approved equivalent. C. DOUBLE CHECK VALVE ASSEMBLY (DCVA) 3”- 8” REQUIREMENTS: i. The main valve body shall be manufactured from 300 series stainless steel. ii. The main valve body shall be 100% lead free through the waterway. iii. The double check valve assembly shall consist of two independently operated spring-loaded cam-check valves, required test cocks and optional inlet and outlet resilient seated shutoff valves. iv. Each cam-check shall be internally loaded and provide a positive drip tight closure against the reverse flow of liquid caused by back siphonage or backpressure. v. The modular cam-check shall include a stainless-steel spring and cam-arm, rubber faced disc and a replaceable seat. vi. There shall be no brass or bronze parts used within the cam-check valve assembly. vii. The valve cover shall be held in place by a single grooved style two-bolt coupling. viii. The main assembly shall consist of two (2) independently operating torsion spring check assemblies, two (2) resilient seated isolation valves, and four (4) ball valve type test cocks. ix. Accepted model: Ames series 2000SS-OSY or city approved equivalent.