Flame King Pressure Relief Valve for 239LB and 420LB Refrigerant Recovery Tanks with 400 PSI 3/4″ MPT Fitting Nutriants At the heart of this

At the heart of this system is the PHB5020 Phantom Commercial DE Ballast with USB Interface

Pressure Parameters: The standard pressure for these air stones is 0

Potassium (K2O)___6

Athena Stack is a natural plant nutrient made from kelp extract

Covers the porthole so that evaporation of the nutrient solution is minimized

Flame King Pressure Relief Valve for 239LB and 420LB Refrigerant Recovery Tanks with 400 PSI 3/4″ MPT Fitting Nutriants At the heart of thisFlame King Pressure Relief Valve for 239LB and 420LB Refrigerant Recovery Tanks with 400 PSI 3 4 MPT Fittings (item #s YSNR239 and YSNR420 400). Valve automatically vents refrigerant vapor when internal pressure exceeds the preset safe limit; prevents tank rupture or explosion in case of overheating (e. g., due to fire or prolonged exposure to high temperatures). Durable and Solid brass construction for corrosion resistance. SAFE and SECURE UL Listed