Below you will find the popular backflow preventers divided by series by Watts. Whenever you’re ordering from your supply company, be sure you know which series your preventer belongs to.
Watts LF007 Series
Dimensions: ½”-3”
The series LF007 Double Check Valve Assemblies should be installed at cross-connections to prevent backflow of contaminated water into the clean water supply. It is approved by most codes but special attention should be paid regarding vertical orientation and frequency of testing.
These double check assemblies by Watts are not designed for drinking water applications. They’re mainly used for non-potable water applications such as irrigation, fireline or industrial processing.
These are the most popular models by size
LF007QT ½”
LF007M3QT ¾”
LF007M1QT 1”
LF007M2QT 1 ¼”
LF007M2QT 1 ½”
LF007M1QT 2”
*Also available with a strainer by adding an S to the model number
Watts LF909 Series
Reduced Pressure Zone Assemblies
Small 3/4" - 2"
This is arguably the most popular line of RPZ assemblies in the United States. These RPZs can be utilized in a variety of installations, including health hazard cross-connections in plumbing systems or for containment at the service line entrance. As opposed to the Watts LF007 double check assemblies, the 909 series can be used for potable water applications.
Servicing is simple with repair kits always available in stock at our store. Whether you’re repairing the first check, second check or relief valve assembly, we have affordable repair kits which will triple the life of the RPZ.
These are the most popular models by size
These RPZ assemblies are also available in sizes 2 ½ - 10”
Watts LF009 Series
This series includes more affordable of small, compact RPZ assemblies that are extremely easy to service and install. This series features two in-line, independent check valves, captured springs and replaceable check seats with an intermediate relief valve. Its compact modular design facilitates easy maintenance and assembly access. Sizes 1⁄4" – 1" shutoffs have tee handles.
This series features two in-line, independent check valves, captured springs and replaceable check seats with an intermediate relief valve. Its compact modular design facilitates easy maintenance and assembly access. Sizes 1⁄4" – 1" shutoffs have tee handles.