Internal Tank Diffuser 5″ O.D. 500226 Part No. 500226 For ease of plumbing 2″ or 2.5″ FNPT ports into water tanks. Requires 500223 gasket. Use with 500227 2″ FNPT or 500228 2.5″ FNPT casting. Description Internal Tank Diffuser 5" O.D. for use with 500227 2" FNPT and 500228 2.5" FNPT castings Download Part Drawing Material Stainless Steel Dimensions 5" O.D. Weight (approx.) 1.5 lbs. In stock