mike wrote:
Stubby wrote:
and there are kits that
let you plumb in hot water to a mixing value (like the shower) so you
fill the toilet with warm water.

BAD idea. If someone flushes a few times, you'll get very hot water
being passed over the wax ring and cause melting or significant
softening.

Is that a BAD joke or something? The mixing valve is the VERY BEST way
to solve this problem. It can be adjusted to limit the flow of hot
water coming through - the temperature is controlled. You may very
well find that the insulation trick won't work well, if at all, in a
retrofit case.

See link below:

http://www.thisoldhouse.com/toh/tvpr...544798,00.html