1" 4-Way Side Outlet Tee, Home TZH 4-Pack 4-Way Corner Cast Black Malleable Iron Pipe Fitting for Industrial Pipe, Furniture and DIY Decoration (4, 1") - Walmart.com
Custom Steel Pipe Tee Fittings | United States Fittings™
RELIABILT 1/2-in Black Iron Tee Fitting in the Black Pipe & Fittings department at Lowes.com