Use tractor to excavate and expose area down to piping in back right area of home behind gate. Remove defective area of piping and install new 4” pvc piping connecting back to existing piping. Will also add second cleanout after sewer passes under AC unit so have capability in the future to go back towards home. Provide and Install new Navien high efficiency, condensing, recirc-capable tankless water heater. Includes calculating proper gas line size, turn off water supply to home, relieve pressure from system, empty contents of water heater, disconnect hot and cold connections, remove old vent line connections, disconnect T&P line, remove old gas whip, dispose of old water heater, mount new high efficiency unit in place, rework hot and cold water lines to connect unit, install new pvc venting through exterior wall, reconnect T&P line, install sediment trap on gas line along with new gas supply, run condensate drain either through exterior wall or into pump (run discharge to exterior l