Brine Tank Asm. 15x17x36 Charcoal w/500

For systems that rely on an air-check style brine draw, the Nelsen 15" x 17" x 36" Charcoal Brine Tank Assembly with a Fleck 500 Air Check is a complete, install-ready package. The square polyethylene tank fits tight spaces where round tanks won't go, while the charcoal cover keeps the unit unobtrusive in basements, garages, and utility closets. Everything ships together as a matched set, so you can get your softener back online without sourcing parts piece by piece.

The standout component here is the Fleck 500 air check. Positioned in the brine line, it closes off air at the end of the brine draw to prevent air from being pulled into the resin tank, protecting cycle integrity and helping avoid waterlogging issues that can degrade softening performance. It's a simple but important safeguard for clean, repeatable regenerations and a key reason many systems are designed around an air-check draw.

In the Box

• Square polyethylene brine tank with cover
• 4" brine well and cap
• Fleck 500 air check for the brine line
• Brine overflow elbow plus connecting tubing
• Compact, space-saving charcoal design

This assembly is a smart pick for replacing an old brine tank or building out a new softener where bench space is limited. The brine tank's job is to store softener salt and hold the concentrated brine solution that recharges the resin bed during regeneration, so a watertight, properly equipped tank directly affects softening performance and water quality throughout the home. Keep it running well by maintaining salt levels above the water line, checking for salt bridging or mushing, and rinsing sediment from the base occasionally. Supplied by Water Softener Plus on the trusted Nelsen platform, this unit is compatible with common residential softener control valves.

A few additional details help you get the most from this unit. Brine tanks like this one work hand in hand with the resin tank: while the resin captures hardness ions during normal service, the brine tank supplies the salt solution that strips those ions away during regeneration, returning the bed to full capacity. Sizing the tank to your salt-use habits and softener grain rating helps avoid frequent refills, and using clean, high-purity softener salt reduces sediment buildup while keeping the safety float and brine line clear.