https://www.snpipeproducts.com/
Gate Valves, Fire Hydrant Castings, Cast Iron Soil Pipe & Fittings, Floor Drains - SNODE
SNODE Pipe Products are produce Gate Valves and Fire Hydrant Castings, Ductile Iron Pipe Fittings and Accessories, and Customized Casting Products.
soil pipe fittings
https://www.astm.org/membership-participation/technical-committees/workitems/workitem-wk94814
WK94814 - Revision of A74-21 Standard Specification for Cast Iron Soil Pipe and Fittings | ASTM
ASTM International - Standards Worldwide