Parts2O FPW217-180B Tank Float Switch<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Turns a pump on when the aerator tank is empty</li><li>Piggyback plug for system troubleshooting and manual operation</li><li>Normally-closed contacts</li><li>Plastic design provides durability</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41k37QLepUL.jpg" noproxy>