@mgplumbinginc: My Tankless when I fired it up was gurgling. As if my exhaust vent had a lot of water in the pipe. Turns out the HVAC / Tinner bellied my vent pipe to get a heat run over the top so my entire vent line is wasted & worthless. So I had to rework my exhaust vent to the outside in a new location. Once I reworked the vent, everything runs perfect now. #tricksofthetrade #plumber #bluecollar #working