One challenge in building your own CO2 regulator is finding the correct parts and making sure they fit together. We would like to help you take all the guesswork out of it, so we have put together the most commonly used NPT fitiings that goes into the building of a complete CO2 regulator. We sell brass fittings for a brass co2 regulator build and nikel plated fittings that's a great match with chrome plated or stainless steel regulators. Still got questions? Drop us a line by using our contact form and we would be happy to answer any question you may have. Click Here