A gas line regulator, also called a point-of-use regulator, sets the final delivery pressure right at the instrument when gas is piped from cylinders or a manifold in another room. These single-stage Harris line regulators have 1/4″ FNPT ports (the HP703, HP723C and HP743 are rated for up to 3000 psig inlet). Choose economy brass (GP403) for industrial gases and purging, the HP703 for lab gases up to grade 5.0, the ultra high purity HP723C for GC carrier gas lines, or the 316L stainless HP743 for grade 6.0 and corrosive gases. For the cylinder end of the line, see our two-stage gas regulators.