I live in Texas and am dealing with a destroyed external tankless hot water heater. When I restore water to my house via the street valve I have water gushing out of the pipe below my hot water heater as it appears to have multiple cracks. I would like to at least use water to the rest of my house while I wait who knows how long for a plumber. What would be the easiest way to cap off this blue pipe or the pipe coming out of my house?
Absent the presence of any valves...go to hardware store plumbing dept. And get a 3/4" sharkbite or tectite end stop. You just shove this on to the end of the (cut or removed) blue pex pipe. Get a 1/2" one in case I'm wrong judging size from the pic...be sure to buy the same size removal tool as well. It is cheap.
I keep these in my emergency preparedness kit...
If you post a pic of the top of this valve, we can help with temporary plumbing. Good luck with your recovery!
If the tankless heater was installed properly there will be a valve just before the heater to allow shutting off the cold water to the heater. My indoor tankess WH has a shutoff valve in the cold line and also has a valve on the hot water side. Double valves are recommended, but I believe that a valve on the cold inlet is required by code. Do you have these?
Is the valve in your current pic in the cold water inlet line or the hot water output line? Blue usually used for cold. The insulation on the other line might have been placed on the hot line. If the blue is the cold inlet, then that valve has shut off the cold inlet to the heater.
We need to see pics of the entire setup.
Where is this in Texas?