Purolite Polystyrenic Gel, Mxd Bed Resin

Purolite MB400 is a premium-grade, gel-type strong acid cation exchange resin engineered for effective water softening. Built from polystyrene sulfonate beads with a uniform particle size and structure, this Purolite resin promotes efficient, consistent ion exchange, making it a dependable medium for a wide range of residential and commercial water-treatment systems.

How It Softens Water

The primary job of MB400 is to remove the hardness minerals that cause scale buildup and reduce soap efficiency, specifically calcium (Ca2+) and magnesium (Mg2+). As hard water passes through the resin bed, these hardness ions are exchanged for sodium ions held on the beads, leaving the water soft. Over time the resin's sodium is depleted, but regeneration with a brine solution restores its capacity so it can continue softening water effectively, cycle after cycle, for years of service.

• Gel-type strong acid cation exchange resin
• Polystyrene sulfonate beads with uniform particle size
• Removes calcium and magnesium hardness ions
• Excellent kinetics, durability, and stability
• Regenerable with brine for long service life
• Premium quality from trusted manufacturer Purolite
• Suited to residential and commercial softening systems alike

MB400's combination of strong exchange kinetics, mechanical durability, and chemical stability makes it well-suited to softeners of all sizes. The uniform bead structure supports even flow distribution and efficient regeneration, helping the resin maintain its softening capacity over many cycles while resisting the fines and breakdown that can shorten the life of lesser media. For optimal performance, pair the resin with a properly sized tank and a correctly configured regeneration program based on your local water hardness and household demand. With Purolite's globally recognized quality behind it, MB400 provides a reliable foundation for clean, scale-free softened water that protects appliances, plumbing, and fixtures throughout the home.

When the resin eventually reaches the end of its useful life after many regeneration cycles, replacing it with fresh MB400 restores full softening capacity and keeps your system running efficiently. Sizing the resin volume to your tank and water demand at the outset ensures you get the longest service intervals and the best value from this premium media. For homeowners and dealers seeking a proven softening medium, MB400 offers the consistent, long-lasting performance that has made the Purolite name a trusted standard.