The Fleck 43644 Bypass Assembly is the OEM replacement component for 5810 and 5812 series control valves, designed to route water around the softener tank during maintenance or service. Built with durable materials and secure clip attachments, this bypass assembly ensures reliable flow control and easy system access.
SPECIFICATIONS
Technical Details
| Manufacturer | Fleck |
| Part Number | 43644 |
| Compatible Series | 5810, 5812 |
| Attachment Method | Clips (included) |
| Material | High-grade engineered plastic |
| Application | Control valve bypass |
| Installation Type | Direct OEM replacement |
| Function | Diverts flow during service mode |
INSTALLATION & USE
Setup Process
- Shut off water supply to the softener and depressurize the system completely before beginning work
- Remove the old bypass assembly by releasing the clips and gently pulling the unit away from the valve body
- Align the new Fleck 43644 bypass with the valve ports, ensuring proper orientation for inlet and outlet connections
- Press the assembly firmly into place until the clips snap securely into position on both sides
- Slowly restore water pressure and check all connection points for leaks before returning the system to normal operation
COMPATIBILITY
System Fitment
The Fleck 43644 Bypass Assembly is engineered specifically for Fleck 5810 and 5812 series control valves. This OEM component provides exact fitment for residential and commercial water softener systems using these valve platforms. The clip-on design matches factory specifications for secure attachment without requiring tools or additional hardware. If you have a Fleck 7000 series valve, use part number 40569 instead, as the mounting configuration differs between product lines.
🔧 Pro Tip: Before installing the new bypass assembly, inspect the valve body ports for any debris or calcium buildup that could prevent a proper seal. A quick wipe with a clean cloth ensures the clips seat fully and the o-rings make solid contact.
