Hot water tank question

zaverin1

So I noticed that on the 280ec hot Water tank is in the aft cabin behind a storage door.
cool with me besides that pressure relieve valve is right there and pointed at the door.
the other day I decided to fix the problem and route the hose from the valve down to the bilge.
at that same time I realized the valve was leaking.
so where can I order a new one pic attached and what size is the id thread because garden hose won't fit and is to big.
thanks 

zaverin1

Also my fresh water tank yuck.
i added bleach and flushed it now few times. What keeps showing up on the screen filter is disturbing lol.
old owners never used it obviously.

NavyCTRC

I think I remember seeing those valves in the same places as new hot water tanks.  I got mine from Defender

zaverin1

Well finally getting ready to route the hose into my engine compartment 
had to go and get 1/2 into 3/4 adapter to fit the tank and hose.
now I hope I can sleep better that if it ever goes it will just flow into the bilge and not God for bid on someone's head.