Lincoln Service Parts 1 › Lincoln Electric 9SM27036 BACK PRESSURE REGULATOR M27036 Lincoln Electric 9SM27036 BACK PRESSURE REGULATOR M27036 Sale Price: $469.08 Original Price: $539.44 BACK PRESSURE REGULATOR PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! BACK PRESSURE REGULATOR PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1