The 521 Series of adjustable thermostatic mixing valves from Caleffi Hydronic Solutions feature Presscon fittings designed for fast, easy installation and maintenance. Available in 3/4-inch press connections, the low-lead valves are cUPC listed to ASSE 1017/CSA B125.3 for point-of-distribution in domestic water system and radiant hydronic heating systems. 414/238-2360; www.caleffi.com.