On Jan 19, 12:39*am, "Bob F" wrote:
frank1492 wrote:
Please recall this is a Marathon all-plastic heater. I assume the
above comments still apply.

There was a problem some years ago where dip tubes in water heaters
disintegrated (recalls resulted). If the particles are plastic (do they melt?)
that could be the problem. The next result would be not enough hot water before
it cools off.

I had one of those suckers. I tried to get in the recall but got
told my heater wasn't supposed to have that problem. But it did and I
took what was left of the white plastic dip tube out which was
practically nothing and drained a ton of white bits the size of large
grains of sand out of it. It was interesting how the tube seemed to
uniformly disintigrate into the same sized grains.

It was pretty easy to tell these were not calcium. They were more of
a bone white.