Has anyone had anything to do with an Aqua-Tech water pump? Mine failed while away this month and while doing some "running repairs"I am sure that I lost a very thin rubber washer between the pump housing and the switch housing. The diaphragm is ok and intact as is the gasket within the switch. Does anyone know if this washer should be there? Apparently the problem with the pump is a failure of the microswitch. (easily replaced).