Glacier Tanks' 15 gallon fermentation tanks have a 15 gallon working volume with 25% head space for 18.75 gallons total volume. Fermentation tanks come standard with a 3mm thick SS304 tank body. Each tank has a 60 degree cone, adjustable legs with oversize feet, a large 16 in.; round pressure manway top, custom racking arm, custom CIP pipe with sprayball, and a 1.5 in.; drain. The 15 gallon fermentation tank comes with a 1 year warranty and includes all valves, clamps, gaskets, thermometer, thermowell, pressure gauge, sample valve, and a second thermowell welded into the tank body. The tank is pressure rated at 14.7 psi. Stainless Steel SS316 body & custom designs available - Call for Pricing.