Amtrol ST-20V-C THERM-X-TROL ASME Expansion Tank, 8 Gallon (142-149) Typical Amtrol THERM-X-TROL ST-20V-C ASME Expansion Tank Installations: • Residential Water Heaters • Laundromats • Hospitals and Nursing Homes • Car Washes • Dishwashers • Plant Washrooms • Hotels and Motels • Restaurants • Schools and Dormitories Amtrol THERM-X-TROL ST-20V-C ASME Expansion Tank Specifications: • Tank Volume (Gallons) - 8 • A Diameter (Inches) - 12 • B Height (Inches) - 20-3/4 • System Conn. (NPT) - 3/4 • Materials: Steel shell, polypropylene liner, butyl diaphragm. Stainless steel System Connection • Maximum Operating Temperature = 200°F • Maximum Working Pressure = 150 PSIG • Factory Precharge = 55 PSIG • Field Adjustable * This product is non-returnable."