T Tamas Well-Known Member Joined Aug 29, 2014 Messages 61 Reaction score 0 Location , May 10, 2018 #1 Hi, What do expansion tanks do at tank less water heaters???
The1PipeDoctor New Member Joined May 21, 2018 Messages 3 Reaction score 0 May 21, 2018 #2 Absolutely nothing. They should not be required by code as the heating of the water is only done in an open system during flow so expansion is a non issue.
Absolutely nothing. They should not be required by code as the heating of the water is only done in an open system during flow so expansion is a non issue.