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Transparent backflow preventer repair kit with assorted rubber seals and components

Watts

Watts 909 Backflow Preventer Repair Kit

SKU CH-KXXS-HP2PT

Repair kit for 909 backflow preventers includes check disc cover, diaphragm, lubricant, piston seal, RV disc assembly and O‑rings

  • ColorTransparent
  • Restores backflow protection with complete repair kit
  • Includes check disc cover for reliable sealing
  • Diaphragm replacement maintains proper valve operation
  • Lubricant ensures smooth component movement
  • Piston seal and RV disc assembly prevent leakage

Watts 909 Backflow Preventer Repair Kit

The Watts 909 Backflow Preventer Repair Kit provides replacement components for 909 QT series assemblies. It suits plumbers and maintenance technicians restoring function to existing backflow prevention devices.

Thermals, noise and power draw

This repair kit contains mechanical seals and discs that operate without electrical power, fans or moving parts. Installation adds no thermal load, acoustic signature or electrical consumption to the plumbing system.

Bundled accessories and software

The package includes a check disc cover, diaphragm, lubricant, piston seal, RV disc assembly, sleeve O-ring, and upper and lower check stem O-rings. These parts enable a complete rebuild of the valve internals using original-specification components.

Highlights

  • Restores backflow protection with complete repair kit
  • Includes check disc cover for reliable sealing
  • Diaphragm replacement maintains proper valve operation
  • Lubricant ensures smooth component movement
  • Piston seal and RV disc assembly prevent leakage

Specifications

ColorTransparent
BrandWATTS

Questions about this item

How do I install the check disc cover and diaphragm in the 909 repair kit without damaging the sleeve O-ring?

Lubricate the sleeve O-ring with the supplied lubricant before seating the check disc cover, then press the diaphragm into place evenly so the O-ring does not roll or pinch.

Which components in the 909 kit will need replacement again after normal service?

The check disc cover, diaphragm, piston seal, RV disc assembly, sleeve O-ring, and upper and lower check stem O-rings are all wear items that will require periodic replacement.

What is the first performance limit that appears on the 909 backflow preventer during sustained flow?

The check disc cover and diaphragm degrade first under continuous pressure cycles, causing seat leakage before other kit components fail.

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