10-32 Ports Industrial Grade Brass Check Valve. The best and most reliable aquarium check valve to prevent water from back flowing into your co2 equipment. Can be used inline by screwing hose barbs(sold separately) on both ends. Very low 1/3 psi Cracking Pressure.
This solenoid uses only 1.9watts which makes it cool to the touch and probably one of the most power efficient solenoid used in the hobby today. The included manifold has 1/8 npt in and out ports. (Note: Does not come with the 12V power adapter.)