how can I heat my water for the home with flu pipe?
I have about 6 foot of single wall flu pipe from my wood heater to the ceiling where it gets into triple wall.I want to wrap coils of 3/8 or 1/2 copper pipe around single wall to get hot water free. Now how would I connect it to my existing hot water heater? Or I can put a 2nd tank outside insulated horizontal and let the water gravity feed into the bottom of the copper coils...would the heat fron flu pipe cause the water to rise up and out into the outside tank?what about the supply of water to the outside tank? concerned about pressure back to water supply line...could use check valve i guess.This system sounds like it should be simple but just want to construct it right and safely, please help
thank you so much