I go a step further and have a float switch in my overflow that will turn
off the pump if the water level goes up past a certain point. That provides
a great deal of comfort.


"BigHaig" wrote in message
ink.net...
Yes, you need to find the perfect balance should the system fail. I no
longer have a external overflow, but regularly test my levels in the sump
and tank to make sure there is not overflow should my pumps fail or power
go out. It will be tougher with an external because if the siphon breaks
the pump will still push water until the sump is empty. So you need space
= the amount of water in sump to avoid an flood.




"Mark Henry" wrote in message
...
Okay, now that makes some sence. So, I need to make sure that my sump is
big enough to handle all the water the siphon might send it if the return
pump dies, and I have to have the level in the tank low enough to handle
all the water in the sump if the siphon quits.

Does that sound about right?

mark h