Lincoln Service Parts 1 › Lincoln Electric 9SM18021 WATER INLET/OUTLET INSULATOR M18021 Lincoln Electric 9SM18021 WATER INLET/OUTLET INSULATOR M18021 Sale Price: $12.79 Original Price: $14.71 WATER INLET/OUTLET INSULATOR PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! WATER INLET/OUTLET INSULATOR PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1