The basement shut off valve for my outside faucet (hose bibb) has been a pain for years. I have repacked the packing nut, replaced the washer, etc. Our water has lots of minerals. I did more replacements today but I still have seepage. I found a new boiler drain. I replaced the shut off valve innards with the innards from the boiler drain and it fit and works with no leaks. Is there any reason not to have done this? I have asked folks in plumbing departments if I could buy a new shut off valve and use its innards as a replacement for mine…..they keep saying ‘no’ that different manufacturers use different specs. Did I luck out with the boiler drain I have?