Do you guys recommend one type of switch over another for a sewage lift pump? I have a customer that needs one replaced and he said the electrician recommended a pressure switch. I never use them and have replaced a couple sump pumps that had them and they failed. Are pressure switches adjustable?

Thanks!



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Thanks packy. I do actually know what they are, I just never buy pumps that use that type of switch. I was curious if there were any pros or cons with them? If you guys prefer any kind over another?

i am partial to the kind that float and turn themselves upside down to make the contact work.
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I have better results with float switches vs. pressure switches. The problem area is usually with the vented cord.

If the existing switch can be disabled or locked in the "ON" position, I would use a "piggy back" float switch.

OK, that is what I told him, that I prefer tethered float switches.

The problem he is having is that the pump keeps tripping the gfi. The electrician said the gfi was doing what it is supposed to and the problem is in the pump or the switch. He said something must be getting moisture in it somehow.

The homeowner currently has the pump plugged into an extention cord to a non-gfi outlet and it works fine. I am skeptical to change the pump and switch to attempt to solve the problem, even though that is what the homeowner wants. I'm afraid it won't solve the problem. I have also had this problem on a sump pump. They are both Liberty brand.

My supply house said that he has been told by the rep AND an electrician that the problem is because the electricians are using the cheapest possible gfi's. He recommended I get a quality gfi and replace and see if that takes care of the problem.

Anyone else have this problem?

A GFCI trips with an almost infinitessimal amount of "leakage". Bypassing it may let the pump operate, but it may also create, or eventually create, a dangerous condition.

NEC doesn't require gfci for dedicated circuits such as sump pumps, dishwasher, etc. Check it out.