Well Pressure Switch

[crokett™]

We call that lever a "pump saver". If the house is under construction, is there a chance that the power was temporarily off and water was used? That would cause the pressure in the tank to drop below the typical cut-in pressure, and that type of pressure switch would prevent the pump from starting. The intended purpose is to prevent the pump from starting if it loses prime. It can take less than a minute running dry to cause permanent damage to the impeller and seals. Lift the lever to manually close the contacts and release after the pressure is above set cut-in. It's hard to lift, (similar to a Taco zone valve that's borderline hurting your finger tip) so much so that I've had some people say "It doesn't move".

the pump has been working for a while.  All the plumbing is hooked up, so you can use the bathroom, etc.  We just lost water pressure the other day.  Will have to see if it happens again.

[WoodCzech]

Our switch failed to turn on a couple times about 3 years back.  I bought a replacement in case it happens again and placed it on a shelf within the line of view of original switch.  It hasn't acted up since