Verified model passport / Watts
909 / LF909 small-body service parts
Reduced pressure zone assembly — selected 3/4–2 inch service parts
The 909 repair family is split by lead-free designation, size, and component scope. This record starts with official small-body references rather than presenting a false universal 909 kit.
This page does not cover 2 1/2–10 inch 909 kits, RPDA variants, flood-sensor accessories, or every discontinued part. Confirm the model suffix and size on the body before ordering.
Compatibility workstation
Match the size and repair scope.
Use the complete model label, nominal body size, and failed component. The tool only exposes combinations found in the cited manufacturer material.
Choose a size band to reveal compatible published kits.
Total repair kit
First and second check-valve assemblies, relief-valve assembly, and lubricant.
Total rubber parts repair kit
Diaphragm, molded disc assemblies, seat O-rings, relief-valve and piston O-rings, flow-tube O-ring, cover O-ring, and lubricant.
Relief-valve rubber parts kit
Diaphragm, disc assembly, seat O-ring, relief-valve O-ring, piston O-rings, and lubricant.
First check repair kit
Disc assembly, seat, seat O-ring, sleeve, check spring, PC cover, and cover O-ring.
Cover repair kit
Cover, cover O-ring, and lubricant.
Check rubber parts repair kit
Bronze disc assembly, seat O-ring, cover O-ring, and lubricant.
Identity check
Confirm this model before ordering.
Similar-looking assemblies can use different internals. A search result or pipe size alone is not enough.
- 01
Verify whether the label reads 909 or LF909; original and lead-free kit references may be different or superseded.
- 02
The first-check, relief-valve, total-rubber, total-service, and cover scopes are different repair decisions.
- 03
Do not mix small-body 3/4–2 inch kits with the separate 2 1/2–10 inch 909 family.
Before return to service
A matching kit is not a passed assembly.
Stop for body damage. Cracks, distortion, severe corrosion, or freeze damage can move the job from internal service to replacement.
Test after repair. Where the assembly is regulated, the governing utility or authority decides tester approval, reporting, and deadlines.
Use the current instructions. Part references can change. Confirm availability and supersession with the manufacturer or an authorized supplier.
Find the governing utilityOfficial source ledger
Trace every compatibility claim.
No retailer copy is used as the authority for the kit map.
- 01WattsWatts RK-909 repair-kit familyVerified 2026-08-02
- 02WattsWatts LFRK 909-T 3/4–1 total repair kitVerified 2026-08-02
- 03WattsWatts LFRK 909-PC-CK1 3/4–1 first-check repair kitVerified 2026-08-02