"Arfa Daily" wrote in message
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"Michael Kennedy" wrote in message
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"Smitty Two" wrote in message
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In article ,
"Michael Kennedy" wrote:

Does anyone know where to get a water flow meter that will close or
open a
switch when water is flowing? I have an AC unit that uses water to cool
itself and it produces 110 deg water if you reduce the flow enough. I'm
trying to build a setup that will switch between the on demand hot
water
heater and the AC unit for the house. The major difficulty is
determining if
there is water flow to the hot water lines in the hosue..

Thanks,

Mike

Jacuzzi heater safety switch is a NO switch that closes when water flows
(i.e. pump is on and working.)

Thanks! I'll look into that. This may be exactly what I need. For use
with hot water, and flow switch.

Mike

My (very typical) automatic shower pump has a flow operated switch in both
the hot and cold sides, to start it up as soon as water flows as a result
of opening the water valve. It's based on a small magnet that moves up
against gravity in the water flow, and closes a reed switch. When the
valve is shut and water flow ceases, it sinks back down, and the reed
switch opens. If you know any plumbers, they're sure to have an old pump
that they have changed lying around, that you could cull the switch
assembly from.

Arfa


Hmm.. Automatic Shower pump? What exactly is that? I'm not sure we have that
here in the USA. Could you describe a little more? Even if we don't have
them I could build one eaisly enough with a hdd magnet and a checkvalve and
a gutted relay. Just don't know how reliable it would be.
Thanks Arfa!

Mike