While others are helping with your water heater issue, I'll post some tips here on how to use the forum with an Android Smartphone.
First, tap the three little bars in the extreme top left of your screen on the forum home page. It will open the forum access points.
Then tap on "FORUMS"
Next, tap on "Forest River Tech Talk"
Next, tap on "General Tech and Repair"
Next, tap on "Plumbing and Water Systems &Fixtures"
This takes you to threads about all the water and plumbing in an RV.
You can start your own thread by tapping the pecil at the top of the screen.
I hope this helps you learn your way around the forum. Take some time when you can to navigate around through the diferent options in the various list. The information here is invaluable as it deals with rv and camping issues.
The steps I've listed will be simlilar on Iphone and computer.
Don't be shy about asking for help. The forum was created with that in mind.
Again, welcome to our little campfire.