My question is what do the letters "P" and "L" stand for on a key shut off valve for gas logs?

  • Can you post a photo? Nov 13, 2017 at 2:47
  • What is the manufacturer and model of your gas logs system ? 'P' could stand for Purge and 'L' for Line. A picture of the valve can be helpful - because it could be 'L P' on that handle - meaning Liquid Propane ..
    – Ken
    Nov 14, 2017 at 3:53

1 Answer 1


P is probably "pilot" for a standing pilot light - L is presumably for "Lit" or on. Typically you'll have off, pilot, and on for many gas appliances old enough to have a standing pilot light. Newer ones are prone to use some other sort of ignition for better efficiency when "off".

Depending on other letters or positions not mentioned, L might also be for "light" as in start the full flame from the pilot at this position - if it can turn up from there, you don't want to go past there until it is lit.

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