EVERLOC compression-sleeve fittings are ideal for heating, snow and ice melting, hydronic radiator connections, when used with REHAU's RAUPEX® PEXa pipes. EVERLOC fittings and compression-sleeves create reliable connections that can be walled in, including applications above the ceiling. EVERLOC straight fittings are machined from solid brass rod. Installation is performed with EVERLOC tools. Follow all published installation instructions. Order EVERLOC sleeves separately.