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Watts 909 Total Relief Kit boxed set with multiple O-rings and disc assemblies

Watts

Watts 909 Total Relief Kit 2-1/2 to 3 in

SKU CH-NDM3-GQ28E

Total relief kit for Watts Series 909 valves includes two molded disc assemblies and multiple O-rings for repair

  • TypeOther
  • Complete repair kit for Watts 909 valves
  • Includes two molded disc assemblies for full rebuild
  • Multiple O-rings cover all critical seals
  • Designed specifically for 2-1/2 to 3 inch models
  • California Prop 65 chemical warning applies

Relief Kit for Watts 909 Valves

This kit provides replacement components for Watts Series 909 backflow preventers in the 2-1/2 to 3 inch size range. It contains two molded disc assemblies, two piston O-rings, two seat O-rings, a cover O-ring, a flow tube O-ring, an RV O-ring and an RV stem O-ring. It is intended for maintenance personnel servicing these specific valves.

Thermals Noise and Power Draw

As a passive collection of seals and internal parts, this kit generates no heat, produces no noise and draws no electrical power. Installation requires shutting down the water system and depressurising the valve body before disassembly. The components restore the relief valve's sealing performance once fitted.

Replaces Worn Internal Seals and Discs

The kit replaces the original molded disc assemblies and all listed O-rings inside the Series 909 relief valve. The upgrade is worth it when the valve drips from the relief port, fails a field test or shows degraded sealing during scheduled inspection. It is not for valves outside the 2-1/2 to 3 inch size range or for other Watts series.

Highlights

  • Complete repair kit for Watts 909 valves
  • Includes two molded disc assemblies for full rebuild
  • Multiple O-rings cover all critical seals
  • Designed specifically for 2-1/2 to 3 inch models
  • California Prop 65 chemical warning applies

Specifications

BrandWATTS
TypeOther

Questions about this item

How do I install the Watts 909 relief kit and what step is often missed?

Shut off water and relieve pressure before removing the cover. Replace both moulded disc assemblies, piston O-rings, seat O-rings, cover O-ring, flow tube O-ring, RV O-ring and RV stem O-ring. The step often missed is lubricating every O-ring with approved silicone grease before reassembly.

Which parts in the Watts 909 kit will need replacement again during future servicing?

All elastomer seals in the kit are wear items. The two piston O-rings, two seat O-rings, cover O-ring, flow tube O-ring, RV O-ring and RV stem O-ring should be replaced each time the valve is opened for maintenance. The moulded disc assemblies may last longer but inspect them for cracking or deformation at every service interval.

What is the first limitation that appears on a Watts 909 valve under sustained heavy flow?

Continuous high-velocity flow accelerates wear on the piston and seat O-rings, causing them to extrude or flatten first. This leads to increasing seat leakage and reduced relief accuracy before any metal component shows fatigue. Regular inspection of those O-rings catches the limit early.

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