http://www.northwaysmachinery.com/product_detail.asp?ItemNumber=Robinair% 2040472%20Tube%20Piercing%20Valve BCNU, Yahoo nuked my website with no warning. Fight organized crime: Re-elect no one... Grant Lenahan <glenahan at vfemail.net> writes: > expect it needs a charge. Problem is, i dont see how. I see no > valve. It is an R22 unit.