To reduce the number of times the fully submersible or the pedestal pumps r
un, you need to adjust the float levels so the pumps do not start to run un
til the water level is about 5 - 12 inches below the top of the floor. Whe
n the pump does run with the float adjusted that way, it will run for a lon
ger time, but the number of starts will be reduced, and the starting strain
is usually what all sump pumps ultimately die from.
Unfortunately, it is not IF a pump will fail, but WHEN it will fail.
We have been in our house for exactly 50 years, and learned this the hard w
ay. I now have two submersible pumps, with the floats set for two differen
t levels, and, in case of a power failure, a water-powered pump set to turn
on just before the water gets to the height of the lowest place in our bas
ement which happens to be right next to the sump hole. Separate discharge/
drain lines for all three pumps and reverse flow valves in each discharge l
ine to keep any critters out that might choose to go up the pipes looking f
or a hospitable home.
I periodically remove power to the first pump and check to see that the sec
ond pump kicks on ok. It takes too long to wait for the water level to reac
h the trigger level of the water-powered pump, so that one requires me to m
anually lift the float to start it running. But, we now can put things in
the basement without worrying about flooding. It will now take a power fa
ilure combined with a total loss of our municipal water supply and a failur
e of all three pumps and the discharge piping before we have a wet basement