usvehj Repair Kit for Watts 1" RK-800M4 Pressure Vacuum Breaker — 12-Piece Rebuild Kit with Seals & Springs

The usvehj 0887728 Repair Kit is a complete 12-piece rebuild set designed to restore functionality to 1" Watts RK-800M4 and 800M4-FR series pressure vacuum breakers without replacing the entire assembly.

If a pressure vacuum breaker is leaking, sticking, or failing to vent properly, replacing individual worn components is faster and more economical than installing a new device. The usvehj 0887728 kit supplies the commonly worn parts — hood, bonnet, seals, springs, float and check components — plus lubricant, so you can rebuild a 1" RK-800M4 series unit and return it to reliable operation.

Which parts are included and why do they matter?

This kit contains the specific components that typically fail first in service: the hood and screws, bonnet and bonnet O-ring, vent spring and vent float, check spring and check disc holder assembly, seat and seat O-ring, and a small tube of lubricant. Replacing these items addresses leaks, sticking valves, and faulty venting.

• Hood and screws: restore protective cover and secure fit
• Bonnet and O-ring: re-establish tight sealing at upper assembly
• Vent float and spring: ensure correct atmospheric venting
• Check spring, disc holder, seat and O-ring: renew backflow prevention surfaces
• Lubricant: eases assembly and helps initial seating of moving parts

How will this kit fix leaks or malfunctioning venting?

Leaks and venting issues often stem from deteriorated rubber seals, compressed springs, or debris-damaged seats. Installing new O-rings, springs and the float assembly restores the internal geometry and spring tensions that allow the breaker to seal and vent properly.

• New O-rings replace hardened seals that leak under pressure
• Fresh springs restore correct vent and check movement
• New seat and disc holder ensure proper shutoff against backflow
• Included lubricant prevents premature wear during initial cycles

Is the usvehj 0887728 kit easy to install for a DIYer or pro?

The kit is designed for straightforward swap-in replacement with basic hand tools; no specialty machines are required. An installer familiar with small backflow devices can typically complete the rebuild quickly by following the original unit’s assembly sequence and standard safety procedures.

• Fits 1" RK-800M4 and 800M4-FR series units — no modification needed
• Parts are pre-sized for direct replacement and alignment
• Simple tools like a screwdriver, wrench and cleaning brush are sufficient
• Lubricant provided to ease reassembly and seating of rubber parts

What materials and durability can I expect from this replacement kit?

Components are manufactured from rubber, engineered plastics and corrosion-resistant steel, chosen for wear resistance and compatibility with potable water systems. Replacing worn parts with these materials extends service life and reduces the need for whole-unit replacement when only internal components are compromised.

• Rubber O-rings and seals resist compression set and provide reliable sealing
• Plastic and nylon components reduce corrosion risk compared with some metals
• Steel hardware offers strength and rust resistance in typical plumbing environments
• Quality parts help avoid repeat service calls when installed correctly

Who is this for: The usvehj 0887728 Repair Kit is aimed at plumbers, irrigation technicians, maintenance staff and knowledgeable DIYers who service 1" Watts RK-800M4 or 800M4-FR pressure vacuum breakers. It’s ideal when the body of the breaker is sound but internal seals, springs, or the float assembly are worn or damaged — providing a cost-effective, time-saving alternative to full valve replacement.