Hydronomics CO2 Regulator & Valve CO2 Regulator: 5-15 Cubic Feet Per Hour. Easy to Use. Designed to Work With Any 120 Volt Control Device. This Unit Includes the Solenoid Valve, Which in Reality is an Absolute Necessity. Also, Comes With Heavy-Duty 6 Foot Long Power Cable as Well as a 10 Foot Long CO2 Line to Reach Just About Anything in the Vicinity of the Unit. The Hydronomics CO2 Regulator & Valve is Built to Last and Comes With a 3 Year Limited Manufacturer Warranty! Better Quality Than the viagrow and c.a.p. CO2 Regulators and at a Better Price! Purpose: Regulate CO2 For "on tap" and Regulate CO2 For Faster Hydroponics Plant Growth! What it is: Pressure Regulators Are Used For Measuring the Release of CO2 Gas Within an Enclosed Area Used to Grow Plants. The Pressure Regulator Attaches Onto a Gas Cylinder CO2 Tank to Show How Much Gas is Flowing Into the Enclosure. Use a Regulator to Ensure the Proper Addition of Carbon Dioxide to a Growing Environment. How to Adjust: Insert a HydronomicsTM Plastic Ring Washer Into the Brass Nut on the Regulator and Hand Tighten it Onto the Tank. Use an Adjustable Wrench to Firmly Tighten the Nut. Open the top crank valve with counterclockwise rotations. Spray All Regulator Connections with window Cleaner or Soapy Water to Check For Leaks. Bubbling Fluid Near a Connection Indicates a Leak. Adjust the Low Through the Regulator by Turning the Back Knob. Turn the Knob Counter-Clock-Wise to Increase the Flow and Clock-Wise to Curtail it.Increase the flow beyond the measurements on the regulator for large spaces. Turn the Flow Knob Counter-Clock-Wise Until the Floating Ball That Indicates the Pressure is Floating Up Over the Top of the Scale. About Hydronomics: We Provide the Highest Tier Products in the Business With Each and Every Products Being Checked by the Founder of the Company, Still to This Day. With All the Bureaucracy and Paper Wor; Ever Single Inbound Shipment is Quality Checked, by the Founder of the Company, and Full Container-Load Shipments Have Been the Sent Back For Having Even the Slightest Issue. Every Item Sold With the Hydronomics Logo is Guaranteed and Backed With a 90 Day Limited Warranty From the Manufacturer and a Mandatory 60 Day Warranty by Any of its Distributor. Hydronomics is Known For the Best Customer Service and it Even Shows on amazon.com With 100% Positive Feedback Maintained at All Times.