Code of Maine Rules › 02 - DEPARTMENT OF PROFESSIONAL AND FINANCIAL REGULATION › 658 - MAINE FUEL BOARD › Chapter 11 - INSTALLATION OF WASTE OIL APPLIANCES AND WASTE OIL SUPPLY TANKS › Section 658-11-8 - Oil Supply and Return Piping

Current through 2024-29, July 17, 2024
11.8.1
Underground Supply and Return Lines
Whenever a copper oil supply or return line is installed
				  under cement, sub-floors, or earth surface, it must be continuous from the
				  burner to the tank without any splices.
11.8.2
Conduit Required
All copper oil supply and return lines must be encased in a
				  continuous piece of non-metallic liquid-tight conduit such as PVC, ENT, coated
				  copper tubing, or other approved material and must be secured in order to
				  prevent physical damage. The end of the conduit shall not exceed more than two
				  (2) inches from any fitting, except the connection at the fuel tank and at the
				  fuel pump located at the burner shall not exceed 6 inches.
In order to avoid undetected oil leaks under floors, the
				  conduit must be a minimum of one pipe size larger than the oil supply and
				  return lines. The ends of the conduit must penetrate the cement or earth
				  surface a minimum of two (2) inches above grade.
An oil supply or return line that penetrates a foundation
				  wall must be sealed at the wall to prevent the entry of water, insects or
				  rodents.
11.8.3
OSV
				Valve or PRV Valve Required: Tanks Higher Than Burner
Coated copper tubing must have an OSV valve or PRV valve
				  installed at the tank when used underground.
11.8.4
OSV Valve or PRV Valve Required:
				Outlets
Wherever an outlet of an oil supply tank is located more than
				  four (4) feet above the burner, an OSV valve or PRV valve is required.
11.8.5
Non-Concealment of
				Oil Lines
No oil supply or return line shall be concealed in a wall,
				  ceiling, or partition unless access to the oil supply or return line can be had
				  without cutting through existing walls, ceilings or partitions. This may be
				  accomplished by providing removable panels.
11.8.6
Bracket Required
When an oil filter or other accessory equipment is connected
				  to copper piping smaller than ¾ inches and is not located within the
				  vicinity of the oil supply or burner connections, the filter or other devices
				  must be rigidly supported by a wall- or floor-mounted bracket or other means
				  that provides sufficient support and stability for servicing this type of
				  accessory equipment.
11.8.7
Flare Fittings Required
All oil supply and return lines of copper tubing must be
				  connected by flare fittings only. All fittings must be accessible for service
				  or replacement. No compression fittings shall be used on a supply or return oil
				  line unless it is for the introduction of the lines at the top of the tank with
				  a single or double tap bushing.
11.8.8
Flare Frost Fittings Required
				Outside
All connections of supply or return oil lines located outside
				  shall be made with flare frost fittings.
11.8.9
Disconnected Lines
No oil lines or oil devices which are disconnected from an
				  oil supply tank, burner or unit, shall be left open. Any oil line or oil device
				  which is disconnected or discontinued must be sealed or closed with a plug, cap
				  or other approved fitting.
11.8.10
Removal of Unprotected Supply
				Lines
Unprotected supply lines that are buried and grouted must be
				  removed from service.
11.8.11
Underground Piping: Tanks Over
				660 Gallons
As set forth in the Appendix to Chapter 8 of Board rules, if
				  underground or under-slab piping is connected to a tank of over 660 gallons
				  capacity, or to tanks with an aggregate capacity of over 1320 gallons, the
				  installation of the underground piping must be installed by a certified
				  underground oil tank installer and otherwise meet Maine Department of
				  Environmental Protection requirements.
11.8.12
Reporting of Oil Spills
				Required
Oil spills, regardless of the amount spilled, must be
				  reported within two (2) hours to the Maine Department of Environmental
				  Protection in accordance with the Appendix to Chapter 8 of Board
				  rules.