1996 Audi A4 Recharge AC

What I did was to get a low presure pipe with the valve in the junker, cut the valve leaving 1-1/2" of pipe in both sides of the valve, then I open the pipe in half, make a hole in the low pressure pipe and clamp the low valve with hose clamps, I use a rubber hose as a seal. Recharge system and done. Works perfect.