Check your local codes before beginning. Some require a 6-inch thick concrete pad for the tank to sit on, while others do not require a pad.
Specially made pads for heating oil tanks to sit on can be purchased, or you can pour the concrete in place. The ground needs to be leveled and mechanically compacted.
Screw the legs of the tank into the brackets, either horizontal or vertically depending on the type of heating oil tank. The legs are made of 1 1/4 threaded black-iron pipes and are 12-inches long.
Set the oil tank on the concrete pad.
Unscrew the cover on the top of the tank at the opposite end of the supply to the heating unit located the side of the tank. Use two-inch black iron or galvanized steel pipes, depending on the local code, for the fill line where the oil company will fill the tank.
The fill pipe must be at least six-inches long or, for inside tanks, must go outside of the building at least a foot off the ground. Use a high-quality pipe dope rated for use on petroleum products on the treads of all fitting connections and on the treads of the pipe going into the oil tank.
Install a removable fill cap on the other end of the fill pipe.
Remove the next cap on the oil tank. Install a 2-inch black iron or galvanized steel pipe at least six inches off the tank or for inside tanks run the pipe outside and up off the ground at least 24 inches.
Use a high-quality pipe dope rated for use on petroleum products on the treads of all fitting connections and on the treads of the pipe going into the oil tank. Install a vent alarm or whistle on the tank side of the pipe, which will whistle while it is filling to tell the person filling the tank that the tank is getting full and install a vent cap on the outside.
Remove the next cap and install the oil gauge. Use the same pipe dope on the treads of the oil gauge.
If there are anymore caps in the tank take them out and use the pipe dope on the treads and reinstall the cap.
Use 2-inch black iron or galvanized steel pipe from the supply line to the inside if the tank is outside. Use a high-quality pipe dope rated for use on petroleum products on all threads.
Reducing fittings are needed to downsize the pipe to the filter, the size of the fittings will depend on the filter. Install a shutoff valve before the oil filter.
Use a 3/8-inch compression fitting to attach the heating unit to the oil filter. Use only compression fittings after the filter to the heating unit.
Have the local inspector and oil company inspect the oil-tank installation before filling the heating oil tank.