Verified customer’s concern of leaking hose bib checked house pressure pressure was at 60 psi inspected thermal expansion tank and found the diaphragm to be punctured. Therefore, thermal expansion tank is not functioning. Informed customer that we would need to replace the expansion tank in order to have a warranty on the repairs to the hose bib customer elected to do the complete repair so I replaced the expansion tank as well as eliminated several shark bite fittings and replaced them with proper permanent pro press fittings I then entered the crawlspace and cut the line to attach a new frost, free hose bib and secured it properly to the brick wall outside using masonry screws.