Shopper It can be use in cold water or is it cold water standard?
CRYSTAL B This regulator can be used in cold water. The 1st stage is environmentally sealed, which keeps the first stage from freezing. I have dove in temperatures of 50 F.If you are unsure of the cold water temperature, you may want to invest in a Mares 22, which handles extreme cold temperatures. If you have any other questions, please feel free to ask at any time
Gasman