Flame King Pressure Relief Valve for 239LB and 420LB Refrigerant Recovery Tanks with 400 PSI 3/4″ MPT Fitting Nutriants Pressure Parameters: The standard pressure

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

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

The EC motor reduces noise and power consumption

• Controls a wide variety of pests including mosquitoes

Athena Stack is a natural plant nutrient made from kelp extract

Flame King Pressure Relief Valve for 239LB and 420LB Refrigerant Recovery Tanks with 400 PSI 3/4″ MPT Fitting Nutriants Pressure Parameters: The standard pressureFlame 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