As other have stated your set up is standard. That is a two stage regulator
and it is now required for indoor cooking-heating appliances to ensure that
liquid propane never makes it to the appliance as could happen from on
overfilled tank late used at an angle where the outlet is picking up the
liquid. The regulator should have a cover to protect the vent especially in
winter. There is plenty of room to shorten those copper lines and re-flare
them. The inlet and outlet fittings on the Extend a Stay can also be worked
to shorten it. There are also different fittings available even with the
male flare ends on them to help. Unless you are using a furnace the 2.5
gallon tank is plenty for two weeks or more of refrigerator and stove use.
There is a larger tank now available (3.3 gallon I think).  Back when our
vans were built places that restricted propane travel usually allowed up to
10 pounds. It seems now most tunnels and some bridges either don't allow it
are restrict its use, (valve has to be turned off and secured). Especially
on ferries.  Considering the small interior volume of our campers I
hesitiate to increase propane capacity. There is just not much room inside
to dissipate it if ever needed.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Vanagon
Sent: Thursday, August 21, 2014 7:39 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Can I add a 5 gallon propane bottle . . .

. . . to my Westy? For longer stays? I don't think my setup is standard so
the extend-a-stay kits may not work. Please see photo:

<http://thatjacksblog.blogspot.com/2014/08/a-question-about-propane-on-westy
.html>

Sent from camp.