CENPEK DC CO2 Solenoid Valve Aquarium System Regulator Magnetic for Fish Tank Water Plant Grass Grow Easy to Install

12V DC powr input, Safer than AC input. Never buzzing noise( AC model long time using maybe have buzzing noise). Lower power consumption, lower Low temperature, no heating. Nuts locking design for CO2 pipe connection, anti-shedding and good sealing. No leaking. FIt for the 6mm pipe (inner diameter 4mm and outer diameter 6mm). It can be used for DIY aquatic CO2 system, and also can be used in CO2 tank system. Don't connect this solenoid to high pressure CO2 tank directly. it should be installed after the regulator, or used on DIY CO2 System. The design working pressure less than 120psi.