Brine Tank Asm. 18x33 Charcoal w/500 AC

The Nelsen 18" x 33" Round Charcoal Brine Tank Assembly with a Fleck 500 Air Check is a complete brine reservoir for residential softeners that draw brine through an air-check system. The charcoal polyethylene tank resists corrosion from salt and moisture, and the round 18x33 footprint suits most household installations. Everything ships together as a matched set, making this a clean, quick replacement for an aging or cracked tank.

Why the Air Check Matters

The Fleck 500 air check is the key part in this configuration. Installed in the brine line, it seals off air at the end of the brine draw so air isn't pulled into the resin tank. This protects each regeneration cycle and helps prevent problems like waterlogging or inconsistent softening performance that can leave your water harder than expected. It's a simple safeguard that keeps regenerations clean and repeatable.

• Round charcoal polyethylene brine tank with cover
• 4" brine well with cap
• Fleck 500 air check for the brine line
• Brine overflow elbow and connecting tubing
• Generous 18x33 salt capacity

This assembly makes an excellent replacement for an aging brine tank or a clean addition to a new softener build. The brine tank holds the salt that forms the concentrated brine solution used to recharge the resin bed and restore its hardness-removing ability, so a sound, watertight tank is essential for both performance and avoiding leaks. Keep yours running well by maintaining salt above the water line, watching for salt bridging along the walls, and rinsing sediment periodically. The charcoal finish keeps it looking sharp in any utility space. Supplied by Water Softener Plus on the proven Nelsen platform, this unit pairs with most standard residential softener control valves.

It helps to understand how this fits into your overall system. In everyday operation, your softener draws brine from this tank only during regeneration, then refills it with metered water to dissolve fresh salt before the next cycle. Pairing the tank with quality pellet or solar salt minimizes mushing and bridging, while an occasional full clean-out, emptying the tank, rinsing the interior, and checking the float or air check, keeps draws strong and regenerations efficient for years.