The PressureWave tank is a premium-quality, industrial-strength pressurized well tank used by top pump companies and installers around the world. The water chamber is constructed of a virgin polypropylene liner and a FDA compliant, high-grade butyl diaphragm which does not impart any taste or odor to your drinking water and keeps the water contaminant-free. The O-ring-sealed air valve and cap and our stainless steel patented water connection ensure no air leakage. The corrosion-free, rugged composite base and rust-resistant exterior paint finish add to the tank's longevity. This is a maintenance-free, pre-charged pressure tank which is backed by a 5-year warranty and can be a direct replacement for most installations.