My question is what do the letters "P" and "L" stand for on a key shut off valve for gas logs?
Letters on a gas shut off/on valve meaning
gas
Related Solutions
How about something that shuts off the gas automatically after a configurable amount of time?
That should do the trick for a start. You will smell gas when you disassemble the pipe and should dissipate. On the jobsite, when this is done, the longer pipe section is removed from the valve on the fed side (fireplace side) of the pipe and capped with a threaded plug with the proper tape sealant or pipe dope approved for gas fittings. A nipple and cap can be used too, instead of a plug. Its a variation of the same thing.
Do be careful on this, this should go without saying, you are dealing with some really explosive stuff here.
Best Answer
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.