Miraco 3" Expandable Rubber Drain Plug (Part 983) for Automatic Waterers Heaters This 250W heater sits in

This 250W heater sits in the valve chamber

2"-3" thick

which in turn controls the main diaphragm valve

replacement access cover for the BigSpring 6000 beef and dairy waterer

non-corrosive materials for long-term use

Miraco 3" Expandable Rubber Drain Plug (Part 983) for Automatic Waterers Heaters This 250W heater sits inMiraco's 3" Expandable rubber drain plug Part 983 can be used in all Miraco LilSpring and BigSpring units. The rubber expandable drain plug is ideal for the Lilspring and BigSpring automatic waterers. Inside diameter is 2. 7" and the outside is 3". The stainless steel bolt and washer will prevent corrosion while the tightening feature will allows for a long term, drain hole seal.