The plastic plug is threaded into the water inlet that is not being used. Plastic is used so that in case of freezing temperatures the plug should pop out instead of cracking the cast iron bracket.
Poly Bowl Automatic Frost Plug 25FP
$1.29
For #25 waterers
Additional information
| Weight | 9 lbs |
|---|---|
| Dimensions | 3 × 3 × 3 in |