thanks jimmy. i wonder if the 21t wouldnt be a way to extract that much more heat? the price difference is minimal at this stage of the game. just dont know if it will fit with its 10" width, perhaps at an angle it will.
im really ready to do this, even with the existing 50gal for now.
Hilkoil 21t or 24s
Taco 007 circulator
Aquastat (switches the circ on?)
Misc Copper Pipe and Threaded Fittings etc
Air removal thingy
Second PRV valve (for safety)
HERE IS WHAT A 5 GALLON HW HEATER DID WHEN ITS TPRV FAILED TO OPEN:
http://www.safteng.net/Accident%20Photo ... losion.htm
AND HERE A BIGGER BLAST:
Anti reverse siphon flapper valve (is this needed to prevent heating the stove, or should I just have a shut off for when the stove is off?)