hot return

[Fallout]

Does the secondary return loop in my drawing look acceptable?

 

[neiltheplumber]

Does the secondary return loop in my drawing look acceptable?

Basically yes, but if the cold goes in at top of cylinder make sure it has a dip tube so that it enters at bottom of cylinder!

 

[Fallout]

by dip tube do you mean so the cold feed that enters the top of the cylinder goes down to the bottom of the cylinder?

 

[neiltheplumber]

Yes, that's the one.

 

[Agile]

Why would it effect reheat time? If there's no demand then the cold will not flow and therefore not effect anything.either way the cold enters the cylinder and will be always cold wherever it enters, so the return mixing with the cold when it enters can't be any different to the cold hitting a hot tank?!

OK, suppose the cylinder is half depleted? Top half is hot and bottom half is cold.

If HW return enters near the top as it should really, then you still have the top half of hot water ready to use.

BUT if the return goes to the bottom by the cold water in connection then the return will mix the hot with the cold and you get a full cylinder of tepid water which will have to reheat before it can be used for a shower.

Tony

 

[neiltheplumber]

A valid point!