Just replaced old hw tank - where is optimum place to fit the tank
thermostat?

Many thanks

In an earlier contribution to this discussion,
DMac wrote:

Just replaced old hw tank - where is optimum place to fit the tank
thermostat?

Many thanks

Fairly low down - maybe 1/4 of the way up. Bear in mind that there will be a
vertical temperature gradient in the cylinder, with the hottest water at the
top. If the stat is too high, it will turn off the heat source before most
of the water is hot.
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Cheers,
Set Square
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Just replaced old hw tank - where is optimum place to fit the tank
thermostat?

The closer to the bottom, the greater the effective capacity of the
cylinder. But ensure it is a little higher than the bottom of the coil, or
it will never be satisfied.

Christian.