Propane hose pigtail replacement

First that "plastic acme adapter" is not designed to form a seal and does not need anything more than gentle hand tightening. The seal is formed between the brass fittings inside the adapter and inside the propane tank. It takes a lot of excessive force and probably use of a wrench to break one.

The hose is a different issue. The problem is the deterioration of the hose due to exposure to propane. This includes drying out and becoming brittle. Another issue is that the deterioration can result in an oily sludge making its way to the regulator. This is not a quality issue but more an issue with the standard materials being used regardless of country of origin. I have been replacing my hoses approximately every 5 years due to becoming stiff and potentially cracking especially in cold weather. I am now trying a "non-leaching" propane pig tail. It is a little more expensive but should last longer. Several companies sell this. Mine is from Marshall Excelsior.

Amazon Propane pigtails

You have plenty to pick from, maybe you can find some made in the USA

Get the Cavagna brand for a superior crimp and quality rubber hose.
Verify if you need the inverted-flare or 1/4 pipe thread before you click and buy.
Get the right length too.

https://www.amazon.com/Cavagna-190-0032-Acme-Pigtail-Hangtag/dp/B00FFAZCFS

Marshall Excelsior is made in the US. Everything.

Here is their camp and RV catalog. https://www.marshallexcelsior.com/sites/default/files/2021%20MEC%20RV%20Catalog.pdf

Very useful catalog with lots of information. For pigtails, you need to decide how long, braided metal jacket or not, and 1/4 pipe thread or 1/4 reverse flare.

Get the part numbers and go searching on Amazon or elsewhere and see what you find.

Charles

Just replaced cheap leaking hoses on a Winnebego (super cheapo lighting too) with Marshalls.Also the regulator was leaking. Always had good results but I am just getting back after 7 years. Scary part was all the hoses leaked and you could smell it inside the unit. What was the last owner thinking?

I have taken old one to propane distributor with service department and had them made. Didn’t cost any more and the hose seems to stay flexible much longer.

I have new pigtails made with rubber hose at Gas Equipment in Denver.

Marshall Excelsior.
I installed longer pigtails on my truck camper not long after I got it in 2020. Last year one of them started leaking. I replaced it and now keep a spare on hand.

Sometimes even the good ones leak.