Windshield washer solution will quickly evaporate leaving the pump dry and
the door closed.

wrote in message
oups.com...
I don't know if anyone in this group can help with this, but it's worh
a try. I'm using a small pond pump (L G Sourcing Model MD 170) to
operate a
contraption I built to open and close a small sliding wooden door on a
chicken coop on a timer. It pumps water into a jug (attached to door by
pulley) that has a slow leak so the door stays open while the pump runs
all day (jug stays full), and then at night (pump off) the water leaves
the jug and the door closes. Worked like a charm since June when I made
it, but now that cold weather is approaching, I need to modify the
system. Here's my question: Does anyone know whether or not this (or
any pond pump) will be damaged if I substitute windshield washer fluid
(methanol based) for the water? I've contacted the pump manufacturer
about this but haven't heard back yet.

Thanks

Lynn Willis