Make a physical mold used for mass-production from plaster and wax.
Casts concrete pipe sections to mold fittings, performing combination of following duties: Tamps concrete into steel molds and smooths edges, using trowel, to cast elbows, lids, or traps. Places fittings on pallets or shelves to harden and adheres hardened sections to complete assembly. Dips hardened sections into grout to facilitate waterproofing. Divides pipe sections, using saw, trowel, or hammer to form Y-shapes or T-shapes and seals joints with grout. Transports finished fittings to yard, using handtruck. Mixes grout and concrete. Cleans and lubricates molds. May prepare production records.