(Reduced Pressure Zone Backflow Preventers)
This valve incorporates the "air-in / water-out" principle which substantially improves the relief valve discharge performance. (The emergency conditions of combined backsiphonage and backpressure with both checks fouled can defeat the effectiveness of a standard RPZ backflow preventers).
Supply pressures to 175 PSI. Water temperatures to 140 Deg. F.
Features:• (2) Quarter-turn, full-port, resilient seated bronze ball valve shutoffs
• Ball valve test cocks
• Bronze body construction
• Modular design, replaceable seats
• Tight-seating rubber check valve and relief valve assemblies
• Stainless steel relief valve seats, shafts and flange bolts
*Strainer Not Included on QT models: use Watts strainers to permit interchange from QT to QTS style.