The Watts D009-QT-S-FS 1/2 is a 1/2" reduced pressure zone (RPZ) backflow preventer with NPT connections, approved for high health hazard protection. It features a bronze body and a silicone seat. Rated to 175 psi.
This 1/2 inch reduced pressure zone assembly backflow preventer helps prevent the flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. The assembly consists of a bronze body and strainer, NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements. This backflow assembly includes flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve. When paired with an add‑on connection kit, the sensor is activated to relay alerts for potential flooding events. Connection kit options include BMS, cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS‑485 Modbus or the Nexa® platform through Wi-Fi.
Features
- Features a flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve
- Add-on sensor connection kit to extend flood monitoring on compatible assemblies
- Sensor Control Monitor integrates smart devices with BAS via RS‑485 Modbus or the Nexa platform through Wi-Fi
- Bronze body construction for durability
- Furnished with a strainer
- Quarter turn full port resilient seated ball valve shutoffs
- Internal relief valve for reduced installation clearances
- Includes: Test Cocks
- Includes: Strainer
- Includes: Flood Sensor
Common Questions
- What hazard level is this RPZ approved for?
- It is rated for high health hazard (toxic) cross-connections, so it may be used on either high or low hazard service. The assembly is listed to ASSE 1013.
- Can this be installed on potable water?
- No. This model is not certified lead-free, so it may not be installed in potable water systems in states enforcing the NSF/ANSI 372 weighted-average lead rule. Use it on non-potable service — fire lines, irrigation or industrial water — or order the LF (lead-free) version of this model for drinking-water use.
- Does this assembly have to be tested every year?
- Yes. This is a field-testable assembly with 4 test cocks. Most water authorities require it to be tested and certified by a licensed backflow tester at installation and annually thereafter. It carries USC FCCCHR approval, which many jurisdictions accept as their sole approval list.
- What shutoff valves are included?
- It is supplied with quarter-turn ball valves on the inlet and outlet.
- Is this listed for fire protection service?
- Yes — it is UL Classified, the listings normally required for a backflow device on a fire sprinkler supply.
- Does the relief valve need a drain?
- Yes. An RPZ relief valve is designed to discharge, and it can dump a large volume of water, so it must never be installed in a pit or below grade and the discharge must be piped to an adequate drain through an air gap. The air gap fitting is not included with this model and is ordered separately. This model includes the SentryPlus Alert flood sensor, which signals a relief-valve discharge before it becomes a flood.
Specifications
-
Type: RPZ
-
Size: 1/2"
-
Inlet Size: 1/2"
-
Outlet Size: 1/2"
-
Connection: NPT
-
Body Material: Bronze
-
Seat / Seal Material: Silicone
-
Max Pressure (psi): 175
-
Application: Domestic Water
-
Backflow Protection: Both
-
Operation: Continuous
-
Country of Origin: United States
-
Warranty: 1 Year Limited
-
MPN: D009-QT-S-FS 1/2
-
Certifications: ASSE-1013, CSA-B64, UL, USC, IAPMO
-
Lead-Free: No
-
Assembly Type: RPZ
-
Hazard Protection Level: High Health Hazard
-
ASSE Standard: ASSE 1013
-
USC FCCCHR Approved: Yes
-
Fire Protection Listing: UL Classified
-
Field Testable: Yes
-
Number of Test Cocks: 4
-
Shutoff Valves: Quarter-Turn Ball
-
Flood Sensor (SentryPlus Alert): Yes
-
Strainer Included: Yes
-
Air Gap Fitting Included: No
