The Keeney Polypropylene J-bend traps debris while preventing toxic gases from seeping into your home. Specifically for bathroom sink installations, Keeney J-bends come with all necessary parts including nuts and heavy-duty washers to protect against leaks for a problem-free connection. Keeney is a leading manufacturer and distributor of tubular drainage products. Founded in. 1923, the Keeney product line includes under-sink drainage, quarter-turn valves, bath drains, toilet repair parts and more.