Check the listing for details. ULTRAponics GroTube ELBOW for replacement or DIY Hydroponic Systems.. Condition: New. Listed at 4.95 USD. Hello. Thanks for looking. This listing is for one ULTRAponics, Inc. ELBOW as used as one of the proprietary parts for our ULTRAponics GroTube made of drinking water quality PVC in the USA. This is a new part intended for use as a replacement for use at the bottom of the fill and drain sides on our Grotubes to connect one System to the next or in your DIY hydroponic system and attaches with 1" tubing to either an ELBOW or TEE (drain side to drain side or fill side to fill side). If you're making your own hydroponic system based on the "Flood and Drip"/"Ebb and Flow" Method out of 4" PVC, these parts are for you. For each system you're making, you'll need one Plant Site, one Strainer, one Plate for EACH plant, plus one Fill, one drain, two End Caps and either two Elbows or two Tees for each GroTube in the SYSTEM. Plans are included with parts purchase. See also: our other proprietary parts, including PLANT SITE, PLATE, STRAINER, DRAIN, ELBOW, TEE and END CAPS for replacements or DIY hydroponic systems that you build. Order as many as needed. 1000s available. See our website for more information: www.ultraponics.net Will ship quantities and mixed/matched ULTRAponics parts at actual shipping cost and will also ship internationally for additional actual cost.Made in the USA !!!