Paul,

I'm not too comfortable with using CLR. It says not to use on plastic
laminates or Formica, and my tail tank is plastic. What I'm more
worried about is the valve. I suspect it's got rubber in it, and
there's nothing on the label that says CLR is safe for rubber. But
thanks for your idea.

I'm not convinced that the drip is due to crud build up. This drip
suddenly appeared, after a summer and fall with no problems. That's
why I have a suspicion that it may be due to an overly tight cable,
which contracted slightly more in the cold to cause the drip. I'll
check the cable tension this weekend to rule the cable in or out.

-John

On Nov 25, 3:15 pm, sisu1a wrote:
Is there anything that would be destroyed by putting a CLR solution in
the tank and letting it soak? By your and others descriptions my
guess is that there are water deposit/oxidation buildups preventing
the valve from being able to completely seat, which could be dissolved
with a CLR treatment. Among other materialsn it's list of materials
it's rated safe to use on is fiberglass, and there are even directions
for using it in coffee makers so it's not terribly caustic although it
is very effective at dissolving the stuff it was designed for -Calcium/
Lime/Rust.

-Paul