Leaking Vented Loop

[jonb]

I have a vented loop on the hose from the head to the holding tank that squirts not so nice fluid out when the head is flushed.
The vented loop is a Marelon that appears to have a replaceable vent cap.

Has anyone else had the same experience where the vented loop leaks?
Is this a common failure? It sure is a messy failure......The vented loop is about 3 years old.
Is it worth trying to replace the cap on the vented loop or should I movce away from the Marelon parts?

Any advice would be much appreciated.

[mitiempo]

You can unscrew the top piece of the vented loop and clean it. Sounds like it is a bit gummed up and stuck in the open position. When clean it lets air in and nothing out.

[k1vsk]

Yup! All vented loop nipples need to be added to everyone's routine maintenance list.

[jonb]

Thanks for the input.
I will try cleaning it although I don't look forward to dealing with the smell.
At least the holding tank was pumped.....