Order this kit for older VT pumps using this style gasket Kit includes: head, bolts, filter, gasket, tube, etc.
Note: New style pump head has only one air line coming off of pump head. If your old pump had 2 lines, order parts MP513901SJ and CV221800AV to adapt this to your unit.
Replace if the head is warped or cracked. Many times a leak occurs because of a hairline fracture. To be sure, spray a soapy water solution around the head and if you see bubbles, this is where the leak is. Always replace gaskets when installing a new head, and remove (and sand) the head of any old gasket material.