Lincoln Service Parts 2 › Lincoln Electric 9SS31225-199 NON-RETURN VALVE S31225-199 Lincoln Electric 9SS31225-199 NON-RETURN VALVE S31225-199 Sale Price: $365.83 Original Price: $420.71 NON-RETURN VALVE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! NON-RETURN VALVE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1