the 2-1/2” – 12” lead free double check detector assembly shall be an Apollo model DCDALF4AN or DCDA2LF4AN. the assembly shall be manufactured in America and carry a 5-year Apollo factory warranty. the TriForce™ center-stem guided check valves shall feature reversible silicone rubber seat discs. the check valves shall be held in place by drop-in retainers (2-1/2” – 6”) or SS studs & nuts (8” – 12”). access to the check valves shall be by an Apollo quickconnect SS coupling (2-1/2” – 6”) or grooved couplings (8” – 12”). the bodies shall be domestic SS in 2-1/2” – 8” sizes and FDA epoxy-coated ductile iron in 10” & 12” sizes. the assembly is a mainline double check valve with a type 2 bypass consisting of a lead free* single check (SCV) and meter bypassing the mainline second check to prevent backflow while accurately measuring all flows up to 2 gpm with the mainline 2nd check remaining closed. assemblies with the optional Type 1 bypass consist of a lead free* double check valve and meter which bypasses both mainline checks and accurately meters all flows up to 2 gpm with both mainline checks closed. the Apollo ball valve test cocks shall have SS handles. the assembly shall prevent contamination of the potable water supply due to back-siphonage or backpressure from substances that are non-health hazards. the pressure drop across the assembly shall be documented by an independent laboratory.

• domestic stainless steel body: 2-1/2”-8”
• fda epoxy coated ductile iron body: 10” & 12”
• easy maintenance: no special tools required
• drop-in check retainers: 2-1/2”-6”
• bolted-in checks: 8”-12”
• low pressure loss as documented by an independent approval laboratory
• center stem guided triforce™ check valves
• 5 year warranty
• small installation space required - small footprint
• chloramine-resistant elastomers
• lead free standard
• optional valve setters eliminate need for thrust blocks below grade
• us patent nos.: 6,443,184; 7,025,085; 7,533,699
• made in the usa (d option)
• optional mounting of bypass on either side for ease of installation