Introduction
This instruction manual provides essential information for the proper installation and maintenance of the Febco 905022 Rubber Repair Kit. This kit is specifically designed for use with Febco 765 PVB (Pressure Vacuum Breaker) backflow preventers, sized 1-1/2 inches and 2 inches. Adhering to these instructions will help ensure the correct function and longevity of your backflow prevention device.
Safety Information
Always prioritize safety when performing plumbing work. Failure to follow safety guidelines can result in injury or property damage.
- Turn off water supply: Before beginning any work, ensure the main water supply to the backflow preventer is completely shut off and depressurized.
- Wear appropriate personal protective equipment (PPE): This includes safety glasses and gloves.
- Depressurize the system: Open test cocks or downstream valves to relieve any residual pressure in the device.
- Consult a professional: If you are unsure about any step or lack experience with plumbing repairs, consult a qualified plumber.
- Handle parts carefully: Rubber components can be delicate; avoid sharp objects that could damage them.
Package Contents
The Febco 905022 Rubber Repair Kit typically includes the following components:
- Rubber disc
- O-rings
- Gaskets
Figure 1: Components of the Febco 905022 Rubber Repair Kit. This image displays the various rubber seals and gaskets included in the kit, essential for maintaining the integrity of the backflow preventer.
Installation Instructions
These instructions provide a general guide for replacing the rubber components in your Febco 765 PVB. Always refer to the specific service manual for your Febco 765 PVB model for detailed disassembly and reassembly procedures.
- Prepare the System: Ensure the water supply is off and the system is depressurized as described in the Safety Information section.
- Disassemble the Device: Carefully disassemble the Febco 765 PVB according to the manufacturer's service manual. This typically involves removing the bonnet and poppet assembly.
- Remove Old Components: Gently remove all old rubber seals, O-rings, and gaskets from the device. Pay close attention to their original placement and orientation.
- Clean Surfaces: Thoroughly clean all sealing surfaces within the backflow preventer. Remove any debris, mineral deposits, or old gasket material. Ensure surfaces are smooth and free of imperfections.
- Install New Components: Install the new rubber components from the 905022 kit into their corresponding positions. Lightly lubricate O-rings with a silicone-based lubricant (safe for potable water) to aid installation and prevent pinching. Ensure all parts are seated correctly and not twisted.
- Reassemble the Device: Reassemble the Febco 765 PVB, following the reverse order of disassembly. Ensure all bolts and connections are tightened to the manufacturer's specified torque settings.
- Restore Water Supply: Slowly open the main water supply valve to repressurize the system.
- Check for Leaks: Carefully inspect all connections and seams for any signs of leaks.
Post-Installation Checks
After installation, perform the following checks to ensure proper operation:
- Visual Inspection: Confirm there are no visible leaks from any part of the backflow preventer.
- Functionality Test: If equipped, perform a backflow prevention test according to local codes and manufacturer guidelines. This typically requires a certified backflow tester.
- Pressure Check: Verify that system pressure is stable and within normal operating parameters.
Troubleshooting
If you encounter issues after installing the repair kit, consider the following:
- Leaks from connections: Ensure all connections are properly tightened and that O-rings/gaskets are correctly seated and not pinched. Re-check torque specifications.
- Continuous discharge from relief valve: This could indicate an issue with the internal components, such as a damaged or improperly seated rubber disc or O-ring. Disassemble and inspect the components for proper installation and condition.
- Water hammer or unusual noises: Ensure all air has been purged from the system after repressurization.
- Device not passing test: If the device fails a backflow test, it may indicate an incorrect installation of the repair kit components or other internal issues. Professional inspection is recommended.
Specifications
| Model Number | 905022 |
| Brand | Febco |
| Material | Rubber |
| Compatible Device | Febco 765 PVB |
| Compatible Sizes | 1.5 Inches, 2 Inches |
| Package Dimensions | 7.1 x 5 x 0.2 inches |
| Item Weight | 0.8 ounces |
Warranty and Support
For specific warranty information or technical support regarding the Febco 905022 Rubber Repair Kit or Febco 765 PVB devices, please contact Febco directly through their official website or customer service channels. Keep your purchase receipt for warranty claims.
For further assistance, you may visit the official Febco website: www.febcoonline.com
