I am replacing an old steel hotwater tank on my boat. and was wondering if I can replace it with 16 gauge stainless steel and make it fit into a corner rather then the round one that was in there. It works off a coil in my oil stove. and is on a presure sys. of 34 psi. I do not know if the tank will handle the presure. any information on building our own hot water tank would help PS the tne tank has to hold about 15 to 20 gal. of water.
Bad idea to make your own there is a lot of engineering and testing that goes in to building a pressure vessel for safty and reliability. If your boat has a 110v power sorce (IE)generator or inverter through the battery I’v heard of rver’s using insinkerator instahots to replace or remodle install for a hot water source.