I have had a lot of trouble finding a female 1  3/4"  acme thread
fitting or adapter.  Do show your setup and let us know if you have a
source for that adapter.

Mike,
As you suspected, I'm not trying to fill the westy tank with liquid
propane, just basically let the gas flow through it or fill it with
propane gas at the pressure of my external tank.

Edward

At 03:58 PM 9/10/2012, Bill M wrote:
>Edward
>I use a female acme thread to female POL adapter. I screw it
>onto my fill valve and them with a male POL to male POL
>can hook a barbecue tank up to Westy. No extenda stay needed. What
>happens is the higher pressure of the barbecue tank (20lb) over
>comes the low pressure in my Westy tank. I used the extra tank all
>last year for my
>propex and still have not gotten it filled. I did manage to
>fill it once using the tank made for a fork lift and some
>adapters but it was really dangerous.
>I was selling the adapters for the fill valve. I may have one
>more if I dig around. I will post a picture of my hose/adapter
>later. You should be able to have your local propane rv dealer make
>one up for under 50.00
>
>Bill