Description Sale! Plastic Frost Plug 3/4 NPT Fits top of TEE for hooking water to Poly water bowls Fits cast iron water bowls 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 GEA 4999-1140-052 Fits - AU82P AU82C Spare parts and Related Items 1140-051 92-00 Valve for 1140-050 Water Bowl1140-052 25FP Frost Plug1112-165 AU82P Repair kit with spring and washer SF2002-2 1112-164 AU-82PL Blue Bowl only for Poly Water Bowl1140-050 Poly Water Bowl Made in Canada 12/22