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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.

Official selected small-body service map

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.

MODEL RECORD Reduced pressure zone assembly showing first check, second check, relief valve, and service cover
Diagram shows the device family, not a substitute for the cast or printed model label.
ManufacturerWatts
Published sizes2 bands
Mapped kits6
Source review2026-08-02

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.

Published references are listed below. Choose a size band to narrow the list.

Manufacturer part referenceLFRK 909-T 3/4-1
Total service / 3/4–1 in

Total repair kit

First and second check-valve assemblies, relief-valve assembly, and lubricant.

Manufacturer part referenceLFRK 909-RT 3/4-1
Total rubber components / 3/4–1 in

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.

Manufacturer part referenceLFRK 909-RV 3/4-1
Relief-valve rubber components / 3/4–1 in

Relief-valve rubber parts kit

Diaphragm, disc assembly, seat O-ring, relief-valve O-ring, piston O-rings, and lubricant.

Manufacturer part referenceLFRK 909-PC-CK1 3/4-1
First check / 3/4–1 in

First check repair kit

Disc assembly, seat, seat O-ring, sleeve, check spring, PC cover, and cover O-ring.

Manufacturer part referenceLFRK 909-C2 3/4-1
Cover service / 3/4–1 in

Cover repair kit

Cover, cover O-ring, and lubricant.

Manufacturer part referenceLFRK 909-RC3-HW 1 1/4-2
First and second check rubber components / 1 1/4–2 in

Check rubber parts repair kit

Bronze disc assembly, seat O-ring, cover O-ring, and lubricant.

Compare another model in the complete repair-kit index →

Identity check

Confirm this model before ordering.

Similar-looking assemblies can use different internals. A search result or pipe size alone is not enough.

  1. 01

    Verify whether the label reads 909 or LF909; original and lead-free kit references may be different or superseded.

  2. 02

    The first-check, relief-valve, total-rubber, total-service, and cover scopes are different repair decisions.

  3. 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 utility

Official source ledger

Trace every compatibility claim.

No retailer copy is used as the authority for the kit map.

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    WattsWatts RK-909 repair-kit familyVerified 2026-08-02
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