Jonty:
I would contact the company that made the fuel tank for Island Packet. That is EZELL INDUSTRIES.
ezellindustriesinc.com/ On this home page they have a phone number and a web form to contact them.
I bet they may have these fuel shut off valves.
I have owned IPs since 1991, and I will share with you, that I have never removed this fitting. I have had fuel blockage, and I simply blow backwards via a hose into any fitting to unblock, then reconnect and pump fuel.
Another fuel trick I will share is you can polish your own fuel with some hoses, a simple 12 volt fuel pump from an auto store and your own on board RACOR fuel filter.
Simply make up the hoses and pump so you can connect this to your racor, then turn on the pump and run your own fuel thru your racor and back into your tank. Attach the pich up hose to a rod so you can use it as a prob pushing the pick up hose into the tank at various angles. Run this for a few hours and filter your own fuel tank. That is what I had to do in Puerto Rico after a hurricane when the island was devastated.
Here is a photo of what I made:
svislandspirit.com/wp-content/uploads/20.../20171207_163320.jpg
I added a 12 volt plug
svislandspirit.com/wp-content/uploads/20.../20171207_163349.jpg
We had to pump some fuel into a jerry jug because the tank was too full
svislandspirit.com/wp-content/uploads/20.../20171207_172012.jpg
I changed the fuel fittings on my racor to standard hose barbs, making it easy to connect.
svislandspirit.com/wp-content/uploads/20.../20171208_102953.jpg
Photo essay is here from 2017
svislandspirit.com/puerto-rico-stt-bvis/
I hope this all helps.
Hayden
