Hi.

I recently changed the thermostat and element in my mains powered water
heater. Since then only half the tanks water gets hot. There's enough
to have a shower but not a lot more. Both the thermostat and element
are the same size (27" - off the top of my head) as the ones I removed.
I've heard that some tanks have a second element lower down - not the
case with mine.

Any ideas?

Thanks
Richard

Richard,
is there an indirect heating coil in the lower part of this
copper cylinder? This would be part of the house central heating
circuit. Being lower in the cylinder it would provide a greater depth
of hot water.

If this heating coils does exist, it may be partially blocked or
a valve maybe closed on it.

Chris.