Fleck BLFC Assem, .50 gpm, 3/8

Dial in precise brine refill on your Fleck 5812 softener with this genuine Pentair Fleck BLFC Assembly rated at 0.50 GPM for a 3/8" brine line. The brine line flow control regulates how quickly water flows into the brine tank, which in turn determines how much salt dissolves to form the brine used during regeneration. As part of the Fleck BLFC service family, it is engineered to fit the 5812 valve and deliver a consistent, calibrated fill rate.

A slower 0.50 GPM refill rate is well suited to smaller systems, or to setups where a longer, gentler fill is preferred. The flow control resists changes in incoming water pressure, so the brine tank receives the same metered volume every cycle regardless of fluctuations in your home's water supply. Holding that rate consistently keeps your salt dosing accurate run after run, which is the foundation of efficient softening.

• Genuine Fleck 5812 BLFC assembly
• Calibrated 0.50 GPM flow through 3/8" brine line
• Controls brine-tank refill volume precisely
• Maintains a steady rate despite pressure changes
• Supports efficient salt use and consistent soft water
• Simple drop-in service replacement

A Small Part With a Big Job

Because the BLFC governs the salt-to-water ratio of every regeneration, a clogged or missing flow control can quietly undermine softener performance without any obvious warning. The first sign is often the gradual return of hard-water symptoms such as spotting, scale, or soap that won't lather, even though the system seems to be regenerating. Inspect the BLFC button for scale or debris if you notice softening problems, and clear or replace it as needed. This 0.50 GPM version is one of several flow rates offered; choose the rate that matches your tank size and brine line so refill stays correctly metered. Relieve system pressure before servicing the brine circuit, and confirm the tank fills to the proper level afterward. Keeping a spare flow control on hand makes seasonal tune-ups quick, and because the part is inexpensive, replacing a questionable BLFC outright is often smarter than trying to clean a heavily scaled one. Matching the flow control to your tank size and target salt efficiency is a simple step that keeps the brine cycle predictable and your soft water consistent season after season.