Introduction:
The R522H Series First-Stage regulators are designed for use as the first regulator of a Two-Stage regulation system on domestic applications. This unit features the latest design in regulator technology and is constructed using corrosion-resistant and wear-resistant materials.

A large 3/4-inch FNPT drip lip-vent reduces the chance of blockage by freezing rain or sleet when properly installed with the vent pointing down. The overall 6.1-inch (155 mm) profile makes the R522H Series ideal for under-thedome installations.

Introduction:
The R312E Series 2-PSI Service regulator serves as an intermediate regulator after the First-Stage regulator. This regulator is designed for Two-PSI LP-Gas regulator systems and is listed by Underwriter’s Laboratories. This unit reduces an inlet pressure of 10 PSIG (0,69 bar) to a nominal 2 PSIG (0,14 bar) outlet pressure.

The R312E Series typically supplies LP-Gas through corrugated stainless steel tubing (CSST) to a line regulator located inside the building. A manifold can be used with CSST for routing to a line pressure regulator supplying approximately 11-inches w.c. to appliance regulators. The regulator is colorcoded white to easily identify the unit as a 2-PSI Service regulator.