Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Suction lines

furnurios
furnurios Member Posts: 1
in Oil Heating

Hello, I have a 2 line system 3/8 copper. I have new vertical 275 tank in detached 2 car garage about 40-50 feet away from oil burner in basement . Questions I have :

  1. Can supply line be attached at bottom of tank and return line through the top? The tank bottom is about 5’ feet higher than the oil pump approx 50 ‘ away….a straight run

Comments

  • HydronicMike
    HydronicMike Member Posts: 93

    By code…no. Supply and return would need to come out the top. But you shouldn’t have a return pipe anyway; for all the reasons mentioned many times.

    You have a pure gravity job. Hopefully your tank is properly protected per code.

    Depending on how cold your garage gets, I would leave supply at the bottom of tank.
    ball valve, filter, OSV. This protects supply line to the burner.
    Code states a firomatic valve at the tank and one at burner.
    Im still putting a ball valve first.
    If you can’t flare and purge on lines properly, put a tiger poop on it at the burner (not a typo).


    —IMPORTANT—

    If you change it back to a one pipe system, you must remove the bypass plug in the oil pump or you will destroy it almost instantly.

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 18,316

    My advise it to keep it two pipe. It makes no difference where the suction connection is made at the tank bottom or through the top. If you come out of the top but a ball valve on the bottom of the tank with a plug in it. If you run both lines through the top you can use a duplex tank fitting.

Categories