Sump pump running once an hour no water draining into pit.
I have 2 sump pumps and 2 pits. One is only for outside ground water, the other is for the washing machine,a/c condensation and whole house humidifier. The last few days the latter (not the pump for outside water) is going off about once an hour. I turned the whole house humidifier off a couple of weeks ago, so there's no water draining into the pit. I know this is not normal since this pump only works when the washer, a/c or humidifier are in use. Any ideas what's wrong? (it works fine otherwise)