Backflow Preventer Retrofit Kit For 1 Inch 800M4 QT To Freeze Resistant 800M4 FR Conversion Complete DIY Friendly Easy Install Set Leaks Repair And Upgrade For 800M4 Series PVB Backflow Preventers

1-Inch 800M4 FR Freeze-Resistant Backflow Retrofit Kit Single
✔️ Converts 1-inch 800M4-QT to 800M4-FR; easy DIY install

This retrofit kit upgrades a 1" 800M4-QT backflow preventer to a freeze-resistant 800M4-FR, ideal for outdoor irrigation in cold climates. It helps seal leaks, blocks backflow, and protects potable water from contamination while enabling a straightforward DIY upgrade.

✅ Model: 0887718
✅ Conversion: 800M4-QT to 800M4-FR
✅ Size: 1" (25.4 mm)
✅ Includes: Hood, Hood Screws (2), Bonnet, Bonnet O-Ring, Vent Spring, Vent Float Assembly
✅ Materials & Life: engineered polymers, corrosion-resistant metal; 8,000+ open/close cycles; up to 3× longer life

💡 What is a backflow retrofit kit used for?

This handy upgrade lets you frost-proof an existing backflow preventer without a full valve swap. - It adds freeze protection to a 1" 800M4-QT backflow preventer - It seals leaks and restores reliable operation in cold weather - It saves time and money by avoiding full valve replacement - It supports safe protection of drinking water by preventing backflow