Hello. Not sure if this is the right place to post since the Reo
mod forum is closed but my Reo feed tube with the nipple came off when I was refilling. How do I reattach the nipple and feed tube? I tried searching but couldn't find anything. Good thing I have another Reo as a backup. Thanks in advance
Well, as fate would have it, the REO subforum just reopened this very day, so you can ask in there as well, but here are some ideas...
The tube was most likely glued to the nipple when the mod was manufactured. It's a tight friction fit - the gluing was just for extra assurance that it didn't come off (many squonk mods just utilize the friction of the tube on a 510 inlet connection, no glue). If it's come free of the nipple, you can just twist it back on and you should be fine. You could also glue it again, but that shouldn't really be necessary.
As for the nipple coming off, there were two ways they were affixed - glued on (older) and threaded/screwed on (newer). If it was the older glued variety, you'll prolly need to send it to the spa for fixing as it's most likely broken the 510 inlet metal tube - the glue rarely gave out, leaving the inlet tube intact. If so, you might consider getting an upgrade to a newer adjustable 510.
If it's a newer screwed on nipple, you're in luck - you just need to screw it back on (clockwise threading. This is easiest if the tube is still attached to the nipple, which it might be from your description, as it allows you something bigger to hold onto to position and thread. There is, however, the possibility that the inlet tube is still broken, in which case, see above about a trip to the spa.