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Oil Safety Valve Install

LittleT Member Posts: 6
If your furnace blower fuel pump is 100 psi + what should be the requirement's for an Oil Safety Valve pressure limits and what is the normal size of fuel lines for a single line furnace I'm thinking 3/8 ?

Thank you !! any help would be appreciated


  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    normal size

    The normal size depends on the pump, how far from tank, how much lift, size of nozzle/firing rate. Oil safety valve goes on the tank to prevent the tank from leaking in the event the oil line breaks, preventing gravity flow from empting the tank.

    The oil safety valve isn't under pressure, so I don't know what you mean by 'pressure limit'.  A vaccuum allows oil to pass.

    There was an error rendering this rich post.

  • Greg Maxwell
    Greg Maxwell Member Posts: 212

    OSV valves are generally only required when the tank sits above the burner.
  • Leo
    Leo Member Posts: 770

    Are you attempting this to comply with the recent Massachusetts law?
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