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 five-year warranty and can be a direct replacement for most installations.. Features: Corrosion Resistant,Pre-Charged. Impeller Material: N/A. Included: Mounting Bracket. Maximum inlet pressure (psi): 150. Orientation: Horizontal. Pack Size: 1. Pipe Size: 1 in.. Product Weight (lb.): 32.5 lb. Returnable: 90-Day. Tank Material: Steel. Tank Volume (gallons): 21 gal. Equivalent Capacity (gallons): 42. Product Depth (in.): 28.6 in. Product Diameter (in.): 16.7 in. Product Height (in.): 16.7 in. Product Width (in.): 16.7 in. Equivalent Capacity (gallons): 42. Orientation: Horizontal