Great Applications: Replacement for Nature2 Express Mineral Cartridge with Express Vessels W20086 W28175 is perfect for most in-ground and above-ground pools up to 25,000 gallons with 1 ½" or 2" rigid PVC pipe plumbing. Treat for all sizes of above-ground or in-ground pools up to 25,000 gallons. Professionally manufactured and tested to meet or exceed OEM standard. Replacement OEM Part # W28175, W20171, W20080, W20086, W26775. Works with Express IG / AG Cartridge.

Keep Water Clean, Clear & Balanced: Advanced Controlled Release Technology releases natural silver and copper ions to produce sparkling clean and clear pool water that is purer, fresher, healthier and gently soothing. Enjoy purest, cleanest swimming experience with your family and friends!

Perfect Design: Proven mineral ingredients with premium-grade PVC housing. Corrosion resistant, anti-impact and anti-deformation for long-lasting reliable use. This mineral replacement will optimize your system. Will not damage your pool equipment or stained above-ground or in-ground swimming pools.

Simple & Quick to Install: It takes a breeze to install. Support continuous use of cartridge up to 6 months. Keeps the pool crystal clear all summer long! Express style Mineral Cartridge with Vessel for optimal performance.