Presscon press fittings with leak detection from Caleffi are designed to detect leaks during system testing if a press fitting is unpressed. Sizes from 1/2 to 2 inches copper are available on several air separators, dirt separators, hydronic separators, magnetic separators, thermostatic mixing valves, balancing valves, press reducing valves and more. The fittings have a working temperature range of 0 to 250 degrees F for up to 50 percent glycol mixtures and up to 200 psi. Fittings meet low-lead law requirements for use in accordance with U.S. and Canadian plumbing and mechanical codes. 414/238-2360; www.caleffi.com.