|This article is about a/an monster in Power Rangers Zeo, the second installment in the Zordon Era.|
Main Drain was an energy draining robot monster used by the Machine Empire. In battle, he shot his drain tubes underground and attached them to the Zeo Megazord. He was the first monster to ever break a Megazord saber, which broke in two after Main Drain electrocuted the Zeo Megazord. He was destroyed by the Red Battlezord.
- In "Fire in Your Tank," Main Drain's head was modified with horns and combined with the orange and blue-repainted body of Cruel Chrome.