Up Aqua’s CO2 Solenoid Valve is an expert/pro level valve to be used with a timer to turn CO2 on and off. It is low heat with a 110V grounded cord and .06 VA holding. This valve can be used inline with tubing or tubing fittings can be removed to be used with a nipple fitting (not included) on most regulators. Do not be fooled by low heat claims by many other manufactures. Tests shows this patented model is the industry leader for low heat and professional quality.