Designed for use in the plumbing market, ProLock Flexi Hoses from John Guest USA are available in several sizes. They are ideal for water heater installations. These corrosion-resistant hoses are double crimped for greater reliability. Fast and easy to install, they can be used with copper, PEX, and CPVC pipe and are suitable for both commercial and residential applications. They are lead-free. 973-808-5600; www.johnguest.com.