There are a number of reasons the original installation has the tee outside.

1) Keep as many connections as possible outside. Two versus five places to
leak.
2) The copper tube provides flexibility, but you need to limit flex at the
fittings. A tee inside has to be mounted. Then the lines from the tee to
appliance have to be long enough or coiled to provide some flex.

Remember that the propane system had to be code compliant for both a vehicle
and dwelling.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Scott Chapman
Sent: Monday, April 19, 2010 1:32 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Future propane changes planned. Prepare in advance?

I am plumbing in my new propane tank and decided to pull the copper
tubing as well and replace it.

In the future I'm planning to add a Propex heater (not sure where yet)
and possibly a second propane tank.

So, I'm thinking that I should put in a 4-way now and cap unused ways so
I don't have to break these lines again in the future.

Good plan?

Also, why do they run 2 small lines from tank to fridge & stove rather
than one line up and T it off inside?  I assume you'd need a bigger line
up to the T to handle the greater volume and "off to the races".  Having
not dealt with natural gases in the past, I'm wondering what the design
reasoning is here.

Happy Trails,
Scott