Specified Fittings provides custom HDPE pipe fittings to order. We also keep a variety of on-demand HDPE fittings in stock in Stevensville, MT, Early Branch, SC, and Longwood, FL. Our current HDPE inventory: Elbows 45° and 90° in DR7, DR9, DR11, and DR17. Tees Line Tees in DR7, DR9, DR11, and DR17. Reducing Tees in DR11, and DR17. Reducers