1800130H (30AHD) by PT-Coupling | Heavy Duty Cam & Groove Adapter | Type AHD | 3" Adapter x 3" Female NPT | Ductile Iron | Buna-N SealFeatures & Applications: Excellent abrasion and wear resistance. Good strength and toughness characteristics. Ideal for use with sand, grout, cement, and other abrasives. Made in the USA Part Name Item # Heavy Duty Adapter Female NPT Thread Max. Allowable Working Press. (PSI)* 15AHD 68761500 1 1 2" 1 1 2" 500 PSI 20AHD 68762000 2" 2" 500 PSI 25AHD 68762500 2 1 2" 2 1 2" 400 PSI 30AHD 1800130H 3" 3" 400 PSI *Above maximum allowable working pressures