Reel McKoi wrote:

"Peter Breed" wrote in message
...
Yesterday the hose from my pump to pressurised filter came of putting
about 1/4 of the contents of my pond mainly over next doors garden.
Fortunately I was about and was in time to switch of the pump before
all the water had gone.
I was wondering if anyone had come across a device to cut off the pump
if the water level got too low?
Peter Breed
===========================
Two words = HOSE CLAMPS! Also, to save your fish, keep your pump off
the bottom of the pond. This way if something "lets go," there will be
enough water left to keep them alive until you notice. You may lose
your pump but will still have your fish. Those black milk crates you
can buy in many stores work well. Just cut some of the cross pieces so
you fish don't get stuck in them.
Strangely it did have a hose clamp. This was the second set of hose
tails, I replaced the first one after it became distorted because I was
unconvinced by the security and overtightened the hose clamp, I may
erred the other way too much. I'd be tempted to use rigid pipes up to
the edge of the pond if I did things over again.
I have got pump on an upturned aquatic planter, but I'd rather lose only
a maybe a foot of water and have things switch off than be half an hour
from losing all but six inches, have a burned out pump. I'm surprised
float switches* aren't more widely available in pond shops. I'm looking
at boat bilge type float switches, they seem to be more available and
cheaper than anything to do with aquatics.
Peter
* Thanks jan for the correct terminology