Selling a Spectrapure Auto top off system. This is the Litermeter III top off. The LM3-TCM Overflow Protection Module is a level sensor controlled switch. I’ve been using these for 10 years and never had one fail. This unit is approximately 6 months old. Also comes with an mj1200 for the pump and a 5 Gallon tank as the resivor. Selling all for $40.00!