Nuogo Bonnet & Poppet Repair Kit for 765-1/1-1/4" Backflow Preventers — 3-Pack with Brass Stems & Seals

Nuogo's 3-pack bonnet and poppet repair kit replaces worn internal parts for 765-1 and 1-1/4" backflow preventers, restoring reliable valve operation without replacing the full assembly.

When a backflow preventer or vacuum breaker begins to leak or stick, rebuilding the internal bonnet and poppet assemblies is an economical way to bring performance back to specification. This kit supplies every internal component needed to refurbish three valves, including metal stems, poppets, springs, seals and lubricant. Each component is sized for the 765-1 (1") and 1-1/4" family of backflow preventers and corresponds to Nuogo replacement part #905-212 compatibility.

What parts are included and how complete is the set?

The kit contains a full set of internal components for three repairs: bonnet caps, poppets, stems, springs, e-rings, washers, O-rings, rubber discs and grease bags. Everything required to rebuild the bonnet and poppet assemblies is in the package, eliminating multiple small parts purchases.

• 3 yellow bonnets and 3 poppets for three separate valves
• 3 stems, 3 springs, 3 washers and 3 e-rings
• 3 O-rings, 3 rubber discs and 3 grease/oil packets
• Compatible with 765-1 and 1-1/4" backflow preventers (905-212 equivalent)

How durable are the components and what materials are used?

Critical valve bodies and stems are made from brass or brass-grade alloys to resist corrosion and deliver long service life in typical plumbing environments. Elastomer seals and rubber discs are selected to provide a leak-tight mating surface while resisting common water contaminants.

• Brass integral valve body elements for strength and corrosion resistance
• Engineered rubber discs and O-rings for reliable sealing
• Coated springs sized for dependable actuation and seating
• Pre-measured lubricant packets to protect threads and seals during installation

Is installation difficult and what tools are required?

Installation is straightforward for anyone familiar with valve rebuilds; the kit is designed to fit into the bonnet assembly with simple hand tools. The included lubricant helps thread engagement and sealing; only a suitably sized wrench or pliers may be needed to tighten the bonnet if required.

• Apply supplied grease to bonnet threads and valve seat before assembly
• Hand-tighten then use a wrench if necessary for final seating
• No specialty tools required beyond standard pliers or adjustable wrench
• Follow manufacturer torque guidelines where applicable to avoid over-tightening

Which models and part numbers does this kit work with?

The repair kit is intended for 765-1 (1") and 1-1/4" backflow preventers and vacuum breakers that accept the 905-212 style replacement parts. It’s engineered to be a direct-fit repair solution where those part dimensions are specified, making it suitable for many service and maintenance scenarios.

• Compatible with 765-1 and 1-1/4" backflow preventers
• Matches Nuogo replacement part #905-212 sizing and fit
• Three full repair sets per package for multiple valves or spare inventory

Who is this for: This Nuogo 3-pack is aimed at plumbers, maintenance technicians, and property managers who service irrigation, commercial, or residential backflow assemblies and want a cost-effective way to renew valve internals. It's also useful for DIY homeowners comfortable with basic plumbing repairs who need replacement internal parts that match 765-1 and 1-1/4" assemblies.