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Clear plastic bag holding assorted rubber o-rings seals and small metal parts for 909 valve repair

Watts

Watts 909 4 in Relief Valve Repair Kit

SKU CH-KZTK-BXKZ5

Complete repair kit restores Watts Series 909 relief valves with all essential seals, O-rings and disc assembly included

  • Product colorTransparent
  • Complete repair kit restores valve performance
  • Includes all critical seals and O-rings for 909 series
  • Diaphragm and piston components ensure reliable operation
  • Lubricant supplied for smooth assembly and function
  • California Proposition 65 warning for chemical content

Relief Valve Repair Kit for Series 909

The Watts 909 4 in Relief Valve Repair Kit provides replacement components for maintaining Watts Series 909 backflow preventers. It is designed for plumbing professionals and facility maintenance teams who need to restore proper valve operation during scheduled service or emergency repairs.

Verify Series 909 Compatibility Before Ordering

Confirm that the installed backflow preventer is a Watts Series 909 model before purchasing this kit. The components are engineered specifically for that series and will not fit other valve models or brands. Check the valve body marking to ensure an exact match.

Kit Includes All Critical Seals and Moving Parts

The package supplies an adapter O-ring, bottom plug O-ring, diaphragm, lubricant, piston O-ring, piston seal, RV disc assembly, sleeve O-ring and stem O-ring. Replacing these items together addresses common wear points and helps return the relief valve to reliable sealing performance.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $348.99
Pricier than about 90% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameWATTS
Product colorTransparent

Questions about this item

What components come inside the Watts 909 4 in Relief Valve Repair Kit?

The kit includes an adapter O-ring, bottom plug O-ring, diaphragm, lubricant, piston O-ring, piston seal, RV disc assembly, sleeve O-ring and stem O-ring for servicing the valve.

How do I know if this repair kit matches the valve installed on my system?

This kit is designed for use with Watts Series 909 relief valves in the 4-inch size, so verify the series number and nominal diameter on the existing valve body.

What does the Proposition 65 warning on this repair kit mean for the installer?

The warning indicates the kit contains a chemical recognised by California as causing cancer and reproductive harm, so wear gloves and wash hands after handling the parts.

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