This page is for general reference only. Always check with your local propane dealers for your safety and local codes.

Tanks in a Row
OPD stands for “Overfill Protection Device”. The OPD valve has a float inside the bottle which prevents any filler from placing more propane than 80% of the bottle’s capacity. Since bottles have been manufactured, they were always designed to carry no more than 80% of total capacity. Although the valves have been around since October 1, 1998, they have not been required until April 1, 2002. All DOT bottles with capacities of 4 – 40 pounds must have the OPD valve. There are not any quick fixes around this.

According to tank manufactures, horizontal tanks made before October 1998 DO NOT need the OPD valve. Tanks made after October 1998 will require the OPD valve.

Yes, you can still use POL (left hand thread) fittings. The OPD valve has inside POL threads, as well as, the outside threads for the new ACME connections. Also, the valve has a push valve which will not allow any propane out unless a connection is made.

The month and date the bottle was manufactured is stamped on the collar ( example: 03-97). The bottle is good for 10 years from this date. After 10 years the bottle may be inspected and recertified for 5 more years.

Propane boils at -44°F. Most heaters draw the vapor from the tanks. Two factors greatly affect the vaporization rate: temperature and bottle surface area. As the outside temperature drops, the vaporization rate of propane decreases.

Lee’s Propane has the following tanks in inventory:

  • 100 gal – 1 stove or 1 small garage heater
  • 250 gal – 1 fireplace or 1 hot water heater
  • 500 gal – 1-2 fireplaces and grill or small heater
  • 500 gal – Small to medium house running 1-5 appliances
  • 1000 gal – Large house, house + pool heater
Lee’s Propane typically installs a two-stage system at residential sites with 250 gal. or larger tanks. This is preferred by the propane industry because of the steady flow of propane delivered to the house. A 10 lb. first stage regulator is used at the tank. This is usually followed by a run of buried 3/8″ copper. On the house, a 11-13 inches of water column second stage regulator is installed. The tank is owned and serviced by Lee’s Propane. The regulators and lines are owned by the customer. Lee’s will install and maintain them if the customer so desires.

The typical customer will use approximately 1000 gallons per year. A good site to visit is