Used Sparkler Filter Model 18-D-12 pressure leaf filter. 316 stainless steel construction. 20" diameter X 28" straight side. Internal rated 60 PSI @ 350 degrees F. (1) 1.5" inlet, (1) 1.5" outlet, (1) 3/4" drain, and (1) 1/2" scavenger. S/N 22442. National Board Number 2246. Built 1987.