Watts LFRK 909-RT 4 Lead-Free RPZ Backflow Preventer

The Watts LFRK 909-RT 4 is a genuine lead-free total rubber parts kit for 4" LF909 / 909 reduced pressure zone (RPZ) backflow preventers. It features a rubber seat. This model is certified lead-free for potable-water installations.

This total rubber parts kit is used for replacing or repairing the relief valve assembly on a 4 inch lead free reduced pressure zone assembly series 909 used to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. This kit consists of a diaphragm, two molded disc assemblies, two seat O-rings, RV O-ring, two piston O-rings, RV stem O-ring, flow tube O-ring and cover O-ring.

Features

• Factory replacement parts
• Check disc, stem O-Ring, sleeve O-Ring
• Relief valve disc assembly, piston seal, piston O-Ring
• Fits 4" reduced pressure zone assembly

Common Questions

Will this kit fit my valve?

The LFRK 909-RT 4 fits the 4" size of Watts series LF909 / 909. Kits are size- and series-specific, so match the model stamped on your valve body or cover before ordering.

What's included in this kit?

This is a total rubber parts kit. Kit consists of: a diaphragm, two molded disc assemblies, two seat O-rings, RV O-ring, two piston O-rings, RV stem O-ring, flow tube O-ring and cover O-ring.

Are these genuine Watts parts?

Yes. This is the factory LFRK 909-RT 4 kit built with genuine Watts OEM components. Aftermarket parts can void your assembly approval and are commonly rejected by inspectors at annual test time.

Which kit do I need if my relief valve failed the test?

For a relief valve fault on LF909 / 909, order the RV kit for rubber parts only or the VT kit to replace the complete relief valve assembly. This total rubber parts kit covers a different part of the assembly.

Specifications

• Type: RPZ
• Seat / Seal Material: Rubber
• Pack Quantity: 6
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LFRK 909-RT 4
• Lead-Free: Yes
• Product Role: repair_kit
• Kit Type: Total Rubber Parts Kit
• Fits Brand: Watts
• Fits Valve Series: LF909;909
• Fits Valve Size: 4"
• Used With: 4" LF909;4" 909
• Kit Contents: Kit consists of: a diaphragm, two molded disc assemblies, two seat O-rings, RV O-ring, two piston O-rings, RV stem O-ring, flow tube O-ring and cover O-ring.
• Watts Ordering Code: 0794090
• Genuine OEM Parts: Yes