Tech notes: out today to install new water heater, prv, and whole home shut off valve. Upon arrival, turned water off to home and drained down home. Cut out old whole home shut off valve and installed new 1/4 turn shut off valve and new watts double union prv. Drained down and removed existing heater. Removed stand and cleaned area. Moved new heater into place and began install. Installed new copper risers, gas flex line, gas drip tee, expansion tank, gas shut off, 1/4 turn shut off. Once all connections were made, turned water back on to test. Everything is functioning properly at this time. Successfully lit heater