Home > Products > Shotcrete & Small Line > Small Line Couplings Small Line Couplings Couplings for Small Line & Shotcrete pipes. Factory Part Numbers Recomended Components Warranty Factory Part Numbers Part Number Extra Gaskets Part # Size (in. /mm) End Type Shipping Weight (lbs./Kg.) C15SG CG15G 1.5/38 Grooved 1.6 / .73 C15SD CG15D 1.5/38 Hevi Duty 3.0 / 1.4 C20SG CG20G 2/50.8 Grooved 2.4 / 1.1 C20SD CG20D 2/50.8 Hevi Duty 4.8 / 2.2 C25SD CG25D 2.5/63.5 Hevi Duty 5.0 / 2.3 C30SD CG30D 3/76 Hevi Duty 8.5 / 3.9 C40SD CG40D 4/102 Hevi Duty 10.9 / 4.9 C50SD CG50D 5/127 Hevi Duty 13.5 / 6.1 Recomended Components Shotcrete Hoses Warranty 3-year limited warranty on mechanical and structural components 2-year limited warranty on gasoline and diesel engines 2-year limited warranty on electrical and hydraulic systems 10-year limited warranty on exclusively designed ‘double ball’ slewing ring