Model 18s15, S/N 22744, built in 1988. Material construction of tank is hast c. 113 PSI test pressure. 75 PSI working pressure @ 350°f. .109" thick shell. 1 ½" liquid inlet pipe size. 1 ½" filtrate outlet pipe size. Ball valve on inlet and outlet. Stainless steel cart on wheels. Internals are priced separately depending on what customer needs.