Find great deals on eBay for 1/2 inch pex. Shop with confidence. Skip to main content. eBay Logo: ... 2 product ratings - SharkBite PEX Pipe Tubing 1/2 Inch, Red, Flexible Water Tube, Potable Water, Pus. $24.33. FAST 'N FREE. Trending at $25.98 Trending price is based on prices over last 90 days. Estimated delivery Mon, May 20.