The Craftsman humidifier I'd installed on the air handler of our home's
heat pump HVAC system started dripping water. I assumed that the float
valve which controls the water level in the plastic tray which wets the
motor driven rotating sponge drum had gotten leaky and wasn't shutting
off properly.

Much to my surprise, the float valve was fine, but the bottom of that
tray was "rotting through", and with a slight push my fingertip went
right through it.

The tray is molded from a hard gray plastic and the bottom which rotted
is about 3/32" thick. The rest of the tray is still hard as a rock.

The water in it was a dirty brown color and there was a fair amount of
brown "mud" in there too.

Might be my fault for not taking it apart and cleaning it more often,
but I'm still amazed that the plastic gave out that way.

BTW, I installed that humidifier about 23 years ago, so I'm not
complaining about "short life", just surprised to see "rotting" of
plastic. I hope some of the plumbing pipes in our home don't suffer the
same fate.(G)

Jeff
--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.