Thermosiphon(All You Ever Wanted to Know)

Big Beam, you are correct, no swing valve needed.

Richard, you are right, if it was forced through the coil when hot water was being drawn at the tap at least it would get a little bit of tempering.

Big Beam, maybe not every state, but here it is a strict law with good reason, every house with public water must have a backflow preventer. The cure for expansion is now every house also has a small expansion tank on the domestic water, just like an expansion tank on a boiler. The reason? A person puts a hose into a tub, bucket, etc to fill it. That tub or bucket has anti freeze, horse poop, bug spray, in it. The tub get's half full and the city loses pressure. All the poison in that tub gets sucked into the city water supply.

Yeah the man is always trying to save us from our self.I don't know what we would do without them.I FEEL so safe.
DON

What Freddy is saying applies to the F.D. that I belong to also. When we are using a fire hydrant and get ready to shut down operations, we must shut the hydrant down before closing our inlet valve on the engine. This is supposed to keep contaminants from entering the water system.

Jeff

Freddy wrote:Big Beam, you are correct, no swing valve needed.

Richard, you are right, if it was forced through the coil when hot water was being drawn at the tap at least it would get a little bit of tempering.

Not needed but again why wouldn't you? You're going to get more than tempering too, our coil is enough to provide DHW by itself.

I have a 1/2" coil so I didn't want to go from 3/4 down to 1/2" and risk a pressure loss.

The coil I built in my wood stove was 1/2" too.The lines feeding the tank from the coil was 1"
DON