Fleck (43644) Bypass Assembly for 5810-5812 Series with Clips Brine Cabinets The polyphosphate component helps protect

The polyphosphate component helps protect water heaters

The 50/50 calcite-corosex blend provides faster pH correction than calcite alone while maintaining stable long-term performance

The PureT TFCK-1812 membrane is designed as a universal replacement for residential reverse osmosis systems using standard 1812-format membranes

The PureT B908 series housing accepts all standard 20-inch Big Blue filter cartridges with 4

Part Number AF-20-3231-BB

Fleck (43644) Bypass Assembly for 5810-5812 Series with Clips Brine Cabinets The polyphosphate component helps protectThe 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)