Check the listing for details. Dura Reducing Barbed Elbow. Condition: New. Listed at 9.26 USD. Please Note: Gray PVC insert fittings are made of the same substances as schedule 40 and schedule 80 PVC are made of. This means a durable long lasting fitting. Insert fittings are normally used with flexible pipe, hose or tubing. Simply slip the barbed insert tip all the way into the end of the flexible pipe, hose, or tubing. Multiple sharp barbs provide a tight grip on the flexible materials to create the seal. It is recommended to clamp over the barbed fittings to provide a reliable leak-proof seal. Proper clamping technique is to place the clamp directly over the barb area and tighten. For additional size specifications see the Spec sheet linked to item page above. Use these durable gray PVC barbed insert reducing elbows to join two different sizes of low pressure poly tubing together making a 90 degree turn. Fitting SizeAcceptable Inside Tubing DiameterFitting UseMax Operating Pressure1/8".125"To connect sections of 1/8" tubing or to connect 1/8" tubing to mainline tubingUp to 30 PSI1/4".170"To connect sections of 1/4" tubing or to connect 1/4" tubing to mainline tubingUp to 30 PSI1/2".570" to .620"To connect sections of 1/2" poly tubing togetherUp to 30 PSI3/4".805" to .820"To connect sections of 3/4" poly tubing togetherUp to 40 PSI1"1.06"To connect sections of 1" poly tubing togetherup to 40 PSI