Short-radius 22.5-degree (1/16 bend) hub x hub elbow for making gentle directional changes in 4" PVC drain, waste, and vent piping. Schedule 40 wall thickness and a solvent-welded joint keep the fitting as rigid as the surrounding pipe, so the bend does not become a slow-point or a weak spot in a building drain or main stack.

• Connection: 4" hub x 4" hub (solvent-weld socket both ends)
• Angle: 22.5 degrees (sixteenth bend / 1/16 bend)
• Schedule 40 PVC, white
• Dual rated to ASTM D1785 (pressure) and ASTM D2665 (DWV)
• NSF listed
• Non-pressure DWV service; maximum operating temperature 140 deg F
• Made in the USA

Applications: Gentle offsets in 4" building drains, main soil stacks, and horizontal branch mains; combining two 22.5-degree elbows back-to-back yields a 45-degree offset, useful for routing a building drain around a foundation footing or beam without the flow-restriction of a 90.

Installation tip: Cut the pipe square, deburr the ID and OD, then dry-fit so the hub bottoms a third to two thirds of the way before cementing. Use PVC primer (purple) on both surfaces, then medium-bodied PVC cement on the pipe OD and elbow ID, push together with a quarter turn, and hold ten seconds. Two 22.5s separated by a short nipple give a smoother flow path than a single 45 in tight horizontal drain offsets.

Note: Not for use with hot-water distribution, compressed air, or fuel gas. For above-ground sanitary drainage only.