LP-Gas Regulator Installation & Service Tip

Field Topics are intended to provide useful information to the network of authorized LP-Gas and Anhydrous Ammonia distributors regarding the proper use of RegO® products.

Warning Bulletins covering many of the hazards involved are available from RegO for more detailed information. These bulletins can be found in our L-500, L-102 and NH3-102 catalogs. Neither the Field Topic or the Warning Bulletins are intended to conflict with federal, state, or local ordinances and/or regulations, which should be observed at all times. This information also is not intended to be a substitute for or to supplement any training in the safe handling and use of propane and related equipment, as required by any applicable law. By providing this material, ECI assumes no responsibility for providing any such training. Only individuals properly trained in the safe handling and use of propane and related equipment should be permitted to do so, and by providing this information, ECI does not assume responsibility for providing such training.

For more information on LP Gas system requirements, refer to Liquefied Petroleum Gas Code (NFPA 58), National Fuel Gas Code (NFPA 54), National Propane Gas Association Safety Handbook, the RegO LP-Gas Serviceman’s Manual L-545, RegO catalogs L-500/L-102/NH3-102, ANSI K61.1 Safety Requirements for Storage and Handling of Anhydrous Ammonia, as well as any applicable local codes and ordinances.

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Regulator Installation Tips

  • Ensure your inlet nozzle is tightened securely into the body. When installing a new regulator use two wrenches to ensure the inlet nozzle does not loosen.
  • Install a new pigtail or hogtail when installing a new regulator.
  • Do not use excess pipe sealant, as it can move downstream and affect regulator performance
  • Install Second Stage Regulators 12-18” off the ground and/or above snow accumulation
  • When regulators are not installed under a protective cover or tank lid, install with the vent pointed vertically downwards. This would apply even when remote venting a system.
  • If seasonal temperatures periodically reach -20 F, or colder the first stage regulator should not be set higher than 10 PSIG. If they reach -35 F, or colder the setting should not be higher than 5 PSIG.
  • Regulators must be vented at least 5 feet from the relief discharge to any source of ignition, or mechanical air intake, and 3 feet minimum from any building opening.
  • When installing a regulator at a container connection, ensure the regulator is placed above the container connection to ensure any liquid droplets fall back into the container

  • When installing regulators at an underground container connection, ensure the regulator is placed above the highest probable water level. In some cases, venting to the top of the container may be necessary ensure the bonnet cap is tight and vent screen is used at the outlet connection of the pipe away.
  • When installing a 597 or 1580 series high-pressure regulator, a 3139 series pressure relief valve is required to provide over pressure protection downstream of the regulator outlet. The plug ports are only for use with a pressure gauge.

Regulator Service Tips

  • Check the regulator vent for obstructions and properly sized. Any vent piping must be equal to or greater than the vent outlet
  • Make sure the vent screen and suppressor are in place and in good working condition.
  • Ensure the inlet nozzle is properly tightened.
  • For high lock-up or creep, check the inlet nozzle and seat disc for debris. Clean or replace the inlet nozzle and seat disc reinstall and recheck your lock-up. Inspect your inlet gas line if debris is found replacement of pigtails and piping may be necessary.
  • When available use a Presto-Tap® gauge for leak checks and gauge purposes. This will help to prevent debris from traveling into the inlet by moving the pigtail to add a gauge
  • Make sure the regulator is properly selected for the BTU load and system demand. Reference should be made to the Performance Curve Selector on the RegO APP.
  • Replace any regulator that has been submerged under water.

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