I would start by performing a flow test at your shower head. Get a 5 gallon bucket and open your shower head full open and time how long it takes to fill bucket. If you fill the bucket say in 1 minute, this means you are emptying 50 gallon tank in less than 10 minutes. (Divide 50 by number of minutes) Keep in mind as you use hot water, it is replaced with cold water, so hot water temp is dropping from the moment you start. Secondly, you most likely temper your hot water with cold which then extends this time. In short this is just a guide but tells you how long it takes to empty tank. If this works out that your emptying bucket in shorter time than your shower, concider checking flow restrictor on your shower head. If this is not the case then call the installer of hot water heater.  

Your question is a technical question. We would suggest that you go to our website (http://www.benningtonbuilders.com), to our Vendor Page and contact Plumbing Parts Plus who will be able to answer your question.

A great feature to have.  If you don’t have a shut off valve ask the plumber to install one.  If you leave on vacation or have a leak you can easily shut off the water to your condo. Check with the association first for the insurance Compamy also.  Billy Gavigan

Norman, thank you so much for your question. Without having a better idea of how the vent pipe makes it to the roof (straight up or bends while making its way up) I can not accurately advise you on this. If you are in the Houston area please feel free to give us a call and we will get you set up with a free consultation. Do you have a tankless purchased or are you still looking to buy?

Yes, contact the installer. Hae them check it. Just from the sound, it could be anything from a bad heating element, malfunctioning thermostat, to being plumbed backward, to name a few. Either way somone qualified to diagnose and repaitr the problem needs to look at it.

$800