WellMate Tank, 87 Gallon 24" x 57"

The Pentair WellMate WM-25WB is a large-capacity 87-gallon composite pressure tank with a wide-body 24" x 57" profile, built for homes and properties with substantial water demand. Its generous drawdown smooths out heavy usage while the rust-proof composite construction promises decades of reliable service, even in the humid mechanical rooms where pressure tanks typically reside.

Capacity Meets Durability

With 87 gallons of total volume, the WM-25WB provides a large reservoir of pressurized water, dramatically reducing how often the well pump must cycle even when multiple fixtures run simultaneously. Fewer pump starts translate into lower energy use, reduced motor wear, and remarkably steady household pressure during peak demand. Minimizing short cycling is one of the most effective things you can do to protect a well pump from premature failure, and a tank of this size excels at it.

As with all WellMate tanks, the seamless composite shell will never rust or corrode, eliminating the failure mode that eventually defeats steel pressure tanks from the inside. A flexible captive air cell keeps air and water cleanly separated to preserve the pre-charge and ensure consistent drawdown cycle after cycle, rather than the gradual capacity loss seen in waterlogged steel tanks. The composite body also resists exterior sweating in humid spaces, helping keep the surrounding area dry.

• Large 87-gallon capacity in a 24" x 57" wide-body tank
• Handles high-demand homes and multi-fixture usage with ease
• Seamless composite construction that will never rust
• Captive-air design greatly reduces pump cycling
• Wide-body shape balances big capacity with manageable height
• Proven Pentair WellMate quality for well water systems

The wide-body 24" footprint delivers this impressive capacity without requiring excessive ceiling height, making it practical for installations that need a large reservoir but lack the room for a very tall tank. For larger residences, properties with high simultaneous demand, or installations that benefit from extended drawdown between pump cycles, the WM-25WB is an excellent choice. Set the recommended air pre-charge before putting it into service, and the Pentair WellMate WM-25WB will combine impressive capacity with the long-life, corrosion-free performance that makes WellMate a trusted name in private well water systems. It is an investment that pays off in both reliability and reduced pump maintenance over the years.