Security group KV 30 for closed hot water tanks up to 200 l capacity. - Includes shut-off valve, non-return valve and interchangeable membrane safety valve with response pressure of 0.6 MPa. - Prevents excess pressure in the hot water tank. - Prevents hot water from returning to the piping system. - Includes siphon trap with accessories for draining expansion water. - Easy installation before the hot water tank on the cold water pipe. - Interchangeable components for quick and easy maintenance. - Made with high quality materials and certified by DVGW. - Includes: safety valve, shut-off valve with connection for pressure gauge, drain trap with wall rosette, double nipple with union nut and wall rosette, 2 connection tubes with compression fittings. - Without pressure reducing valve, can be installed later or see model KV 40. - Usage limits: Maximum allowed pressure: 0.48 MPa.