I'm posting this in Trailer Sailors because it's probably not relevant for most non trailer sailors.
Following some advice in @Peggie Hall HeadMistress 's book, that it's important to have plenty of oxygen in the holding tank, I decided to make a ventilation system. It turns out that the deck fitting is 1-1/4 NPT, so, I was able to thread an in-line valve I had left over from another project into an standard NTP plug and bond an air-line fitting into it. Now, whenever I'm done with my compressor, I just plug in the line and let it exhaust through the holding tank. The valve allows me to regulate the flow to ensure the tank isn't over pressurized. Since not everyone will have a nice little valve like this lying around, you could achieve the same thing (safer, even) by dialing down the regulator on the compressor before you hook it up, so that it can barely put out any pressure. Or, you could fill the air-line fitting with epoxy and drill a small hole through it, to regulate the flow.
Always check the holding tank exhaust when you do this to ensure that the air is flowing freely!
Following some advice in @Peggie Hall HeadMistress 's book, that it's important to have plenty of oxygen in the holding tank, I decided to make a ventilation system. It turns out that the deck fitting is 1-1/4 NPT, so, I was able to thread an in-line valve I had left over from another project into an standard NTP plug and bond an air-line fitting into it. Now, whenever I'm done with my compressor, I just plug in the line and let it exhaust through the holding tank. The valve allows me to regulate the flow to ensure the tank isn't over pressurized. Since not everyone will have a nice little valve like this lying around, you could achieve the same thing (safer, even) by dialing down the regulator on the compressor before you hook it up, so that it can barely put out any pressure. Or, you could fill the air-line fitting with epoxy and drill a small hole through it, to regulate the flow.
Always check the holding tank exhaust when you do this to ensure that the air is flowing freely!