Min Tnk, 9x48 Natural Polyglass

The Pentair 9" x 48" Natural Polyglass Mineral Tank (alternate part PT0948-A) is a versatile mid-to-large residential vessel well suited to water softeners, whole-house carbon filters, and iron-reduction systems. The 9" x 48" size strikes a useful balance between media capacity and footprint, serving larger households and higher-flow filter applications that an 8-inch tank can't quite keep up with.

Durable polyglass build

This tank is constructed of natural-finish polyglass—a fiberglass-reinforced shell over a seamless inner liner—which is the long-established standard for residential treatment vessels. The seamless liner won't corrode or flake, protecting water quality over the life of the tank, while the fiberglass overwrap resists both the chemistry inside and the humidity of a mechanical room outside. The tank comfortably handles the working pressures of home water systems and weighs about 12 lbs empty, light enough for a single installer to position with reasonable care.

• 9" diameter x 48" height for larger residential systems
• Natural-finish polyglass (fiberglass-reinforced) construction
• Seamless, corrosion-resistant inner liner
• Holds softening resin, carbon, or specialty media
• Approximately 12.22 lb empty weight
• Genuine Pentair mineral tank (alt. PT0948-A)

Because it's a genuine Pentair tank, it mates predictably with the standard control valves and distributor tubes sized for its opening, dropping cleanly into typical larger-home builds without compatibility surprises. When filling, leave appropriate freeboard above the media so the bed can lift and stratify during backwash, and cover the riser tube to keep media out of it while pouring. Adding a gravel underbed where the media calls for one supports the distributor and improves flow across the bottom of the tank. The extra media volume of a 9" x 48" tank means higher service flow and longer runs between regenerations or backwashes—a real advantage in homes with high water use or more challenging source water. Mounting the tank on a level, stable surface keeps the valve and plumbing aligned and reduces stress on the threaded connections over time. Whether you're building a new system, upsizing from a smaller tank that can no longer keep pace, or replacing an aging vessel, the Pentair 9" x 48" polyglass mineral tank provides a robust, properly engineered foundation. Complete it with the appropriate valve, distributor, and media for a reliable, higher-capacity home treatment system that serves the whole household.