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krw

In article om,
says...
I've had several of these knot up over the years, not regularly enough
to just replace them, just often enough to be an annoyance. I've tried
many types, all seem to have some draw-back. I'm looking for product
recommendations, modifications, anything anyone has done that worked
for years. I can tell you some things that don't work; the rubber
straps with the arrow shaped stops (too rigid), the fluid master black
plastic chain (worst knotting problem to date, it floats hence the
tangles).

If the chain is getting knotted up, you have it too long. Shorten
the chain so there is just a little slack when the flapper is
closed and the handle up.

--
Keith