Backflow Preventer Valves, 909QT Series

Reduced Pressure Zone Backflow Preventers

Series 909QT: This valve incorporates the (“air-in/water-out”) principle which substantially improves the relief valve discharge performance. (The emergency conditions of combined back siphonage and back pressure with both checks fouled can defeat the effectiveness of a standard RPZ backflow preventers).

Note: Sizes from 3/4" through 2". Supply pressures to 175 PSI. Water temperatures to 140° 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
• Available with or without bronze strainer

The 909QT Series come standard with a flood sensor. Sensor activation kit must be purchased if this feature is desired.

Strainer Not Included on QT models: use Watts strainers to permit interchange from QT to QTS style.