Re: Pressurized or not, Whats the difference? Part

Posted by Sam#3 on August 28, 2006 at 06:22:40 from (12.215.181.152):

In Reply to: Pressurized or not, Whats the difference? Part 2 posted by sstractoranch on August 27, 2006 at 22:12:56:

I read you post of a couple days ago but when you presented the picture I was reminded how you determine the difference. It's the location of the locking tabs. Yours is a non-pressurized system because there is no neck for the pressure diaphragm.
On a pressured system the tabs will be on the outside of the neck so when the diaphragm is inserted it will seal the tank. The overflow tube will be located near the top if the neck. When the pressure increases the diaphragm will be forced upward past the tube to release the buildup of pressure. Check the cap on your auto to see what I mean.
I suppose you know the reason for the pressurized system is to raise the boiling point of the system and you will see a temp. above 212 degrees.
I'm not sure of the terms long and short neck. You should have a themostat, I think.

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