Min Tnk, 8x44 Natural Poly Glass

The Pentair 8" x 44" Natural Poly Glass Mineral Tank (alternate part PT0844-A) is a popular mid-size vessel for residential water softeners and whole-house filters. The 8" x 44" format is one of the most common tank sizes for single-family softening and filtration, which makes this a true go-to choice for new installations and replacements alike—the kind of part that fits the majority of typical homes.

Why this size is so common

An 8" x 44" tank holds enough resin or media to soften or filter the water for a typical household while keeping a slim footprint that fits comfortably in a garage, basement, or utility closet. The natural-finish poly glass construction—a fiberglass-reinforced shell bonded over a seamless inner liner—resists corrosion from both the water chemistry on the inside and the ambient humidity on the outside, so the tank won't rust or shed material into the water it treats. At under 9 lbs empty, it's manageable for a single installer to maneuver and set in place without a struggle.

• 8" diameter x 44" height—a common residential size
• Natural-finish poly glass (fiberglass-reinforced) construction
• Seamless, corrosion-resistant inner liner
• Holds softening resin, carbon, or specialty media
• Approximately 8.91 lb empty weight
• Genuine Pentair mineral tank (alt. PT0844-A)

This tank pairs cleanly with the standard residential control valves and distributor tubes sized for its opening, so it drops into typical softener and filter builds without surprises or compatibility headaches. Use it for a whole-house carbon filter, a water softener, an iron filter, or a custom specialty-media application—the versatile size handles all of them well. When loading media, the natural translucent shell is a quiet bonus: it lets you eyeball the bed level and watch for channeling or fouling without opening the tank. It's also worth covering the open riser tube while pouring resin so stray beads don't drop down it and foul the lower distributor, then topping the bed only to the manufacturer's recommended freeboard so it has room to expand during backwash. Whether you're assembling a new system, upgrading from an undersized tank, or replacing one that has aged out after years of service, the Pentair 8" x 44" poly glass mineral tank delivers a durable, properly engineered vessel that sits at the heart of countless reliable home water-treatment systems. Add the valve, distributor, and media to complete the package.