Re: Replacement for an old Atlantic Marine Products water heater
Whale makes a small 3 gallon (US), 11 litre, water heater, but it's still slightly larger than the dimensions you quote.
About 14 1/2" Width x 13" Height x 14" Depth
Unfortunately, Atlantic Marine
is out of business.
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"