Propane Tank Connector Ratings Question

[carnivore]

I replaced a leaking LP pigtail. The tank connector on the original was light green while the replacement I found while on the road happened to be a dark green. Later while at a campground making my repairs, a fellow camper said that he once replaced a leaking light green tank connector with one that was dark green and then began to have various propane flow problems. He said that he switched his dark green out with a light green fitting and solved his problems.  He didn’t provide any details of his problems.

I did not know that there were color codes on LP tank connectors. Evidently different colors have different internal spring tensions for managing different flow rates.  According to Etrailer the light green connectors are rated for 200,000 Btu per hour. The black are rated for 70,000-100,000 Btu per hour. The dark green are rated for 450,000-500,000 Btu per hour. The Red connector is the strongest spring and is often used for high pressure adapters and T-fittings.

The question that I can’t seem to find a  specific answer to is:

Do the higher btu or flow rated dark green fittings work fine in our application. In other words, even though the dark green are rated for higher flow rates than I will ever need in my camper, do they perform just as well when they are used for lower flow rates as those of the light green ratings?

 

[Galway Girl]

Thanks for the tips and questions.

Here's a good overview video on the topic.