HVAC Hose Fittings

Hey guys,

I fixed a leak in my AC system and now want to pull a vacuum and make sure it will hold. A friend of mine lent me a vacuum pump, however, my R134A gauge set service hose has a larger fitting than what is on the pump. My friend said it was an old commercial pump. Does anyone know what sizes I may need for adapters to get the R134A hoses on? Aren't the 134A fittings larger than the R12 fittings of yore? I haven't been able to find anything that adapt from R134a to R12, but many items that will adapt from R12 to R134a. Any advice is appreciated.

thanks,
matt

http://www4.shopping.com/istlo?mn=eBay&votf=http://stat.dealtime.com/DealFrame/DealFrame.cmp?bm=780&BEFID=554&aon=%5E&MerchantID=448775&crawler_id=1923394&dealId=_eomidKGHD4TpB7c3Nwa-Q%3D%3D&url=http%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-57618-1854-0%2F2%3Fipn%3Dpsmain%26icep_item_id%3D170493740433 %26icep_vectorid%3D240251%26kwid%3D1%26mtid%3D570% 26crlp%3D1_240251%26kw%3D%7Bquery%7D%26query%3D%7B query%7D%26linkin_id%3D%7Blinkin_id%7D%26fitem%3D1 70493740433%26mt_id%3D570&linkin_id=8011124&searchID=tzyP7h6ZxM&DealName=R134a+To+R12+%26+R12+To+R134a+%22the+Set% 22+Brass+Adapters&dlprc=8.95&crn=&istrsmrc=1&isathrsl=0&AR=1&NG=7&NDP=40&PN=1&ST=&DB=sdcprod&MT=phx-pks15&FPT=DNSR&NDS=&NMS=&MRS=&PD=0&brnId=3339&IsFtr=0&IsSmart=0&DMT=&op=&CM=&DlLng=1&RR=1&cid=6922911205&semid1=&semid2=&IsLps=0&CC=0&SL=0&FS=0&code=&acode=&category=&HasLink=&frameId=&ND=&MN=&PT=&prjID=&GR=&lnkId=&VK=&IsGtb=0&SPT=CROSS&sig=48e6d8c3ba6110c1cbcd436ae278123cd6c9224c&CT=2
or search r134 to r12

Not sure how the fitting is attached to your pump but you can get the right fittings in a R134a fitting conversion kit for cars/trucks. Just unscrew the old style and screw in the new one...$10 at any auto store, Walmart, etc.