AMGO 942 FRP Outdoor Master Fiber Glass Water Filter, Water Purifier,inexpensive whole house filtration,Water Filter 1 year Local Supplier Warranty Self Installation FRP Pressure Vessel, Strength and Durability. 5 layers Filtration System, with backwash system. It is Also extends the life cycle of the drinking water purifier,water filter Typically have a long lifetime (3-5 years typically) 9" x 42" FRP Outdoor Master Filter · HIGH QUALITY PRESSURE VESSEL. · FRP PRESSURE VESSEL, Strength and durability. · 5 Layers of sand filtration system, with backwash system. · More clean water is available for all household use.Including washing, showering, cooking, laundering and drinking. · It is also extends the life cycle of the drinking water purifier. · Typically have a long lifetime (3-5 years typically) · Due to the long filter life, it is inexpensive way to have clean household water. ~Light weight champion: Reinforced composite construction makes this tank one-third the weight of stell tanks and comparable in strenght. ~Safety Wrap Tank construction of thermoplastic composite resin and wrapped in high tensiite filament windings. ~Inner Strength High-strength polyethylene liner in thickness from 0.15" (3.8mm) to 0.3" (7.6mm) ~Great Under Pressure Burst testing up to 4 times the rated operating pressure 100psi. ~The test of time. Cycle tested up to 250,000 times (range: 10 to 100 psi) ~Stamp of approval NFS certification This water softener pressure vessel is tested and certified by NSF against NSF/ANSI Standard 44 for material and structural integrity requirements only.