Let me explain the differance between the Hayes tank and the conventional type you have with that expansion stopper. The Hayes does not use a stopper plug like that, instead the main plug is much smaller and is a hard plastic and there is an 'O' ring on this plug the only line through this plug is the clunk line and is the one that goes to the carb or needle valve.

Actually this does not go through as it has a molded in nipple on the inside and the outside. You only need to cut the clunk line to length and slip on the nipple. The line to the carb can be slipped on later.

This plug is a tight slip fit into the tank outlet and there is a steel ring to slip on the outlet that prevents any spliting of the main tank. This set up is far easyier to use and more reliable.

The vent on this tank is molded into the tank itself and is the top one of two nipples at the front of the tank up top. Your muffler line will connect to this top vent and the tank has to be oriented with the vent on the top when the tank is in the airplane.

There is a second nipple that is just below the vent nipple this is a fill line and I recommend not using this it is sealed anyway so you have to do nothing there. For your airplane definately use just a simple two line setup.

You will enjoy the Hayes tanks after you begin to realize all the advantages.

John[8D]