Positive reliable joints made in 2 minutes installation time is reduced;Several joints can be made at one time;Proven reliability for over a decade;Enfield is manufactured from polypropylene which has an operating temperature range from -10 Degree F (-23 Degree C) to 212 Degree F (100 Degree C). This allows systems to be flushed with boiling water;Heavy gauge resistance wire molded into sockets-no loose components, controlled fusion of joints;Easy connecting heavy duty socket terminal posts complete with protection ears;Microprocessor controlled Enfusion unit ensures secure joints and joint repeatability;Matched system-high quality pipe and fittings are matched to give ease of installation and long term reliability;Easy to install - even in difficult areas;Installed cost 50% less than glass;Breakage factor eliminated;Maintenance free