Lincoln Service Parts 2 › Lincoln Electric 9SS25400 MODIFIED GAS-BYPASS VALVE S25400 Lincoln Electric 9SS25400 MODIFIED GAS-BYPASS VALVE S25400 Sale Price: $96.79 Original Price: $111.31 MODIFIED GAS-BYPASS VALVE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! MODIFIED GAS-BYPASS VALVE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1