For this job I came out and replaced an old water heater, removed and replaced old one with new Rheem 50 gallon gas short water heater. Re worked and installed new single wall venting for the water heater, re worked gas, installed new gas caulk. Turned on water heater set at 120 degrees, bled all lines, also removed and replaced hose bib shut off valve as a courtesy. Tested and checked for leaks, conducted a super clean up.