Larry Jaques wrote:
On Mon, 10 Dec 2018 20:40:21 -0000 (UTC), bob prohaska
wrote:
I'd like to service a shower valve in a 1957 house with original plumbing.
The bonnet nut uses a round boss 7/8" in diameter with two flats milled
in it about 3/4" apart. It'd be a cinch if the valve stuck out of the wall,
any open-end would fit. Unfortunately it's recessed about an inch behind the
tile, so a socket is reuquired.
All the wrenches I can find fit hex nuts, does anybody know the correct name
for the required tool? From time to time "nuts" like this have crossed my
path, but I've never encountered one used in a position that requires a
socket to grab it.
At this point I don't even know what to look for. Correct terminology would
help a great deal.
Thanks for reading, and any guidance.
That's the problem with posting a question about unseen hardware here.
Like calling the body shop and asking "How much to fix my fender?" LOL
Sounds like what I call Double D, but I've never seen one on plumbing,
only on electronics and front wheel spindle washers.
Double-D looks right in the photos, but the few examples I can find
on-line are all much too small. Still, it's a start, I've never seen
the term before.
The worst part about plumbing is that the guy who installs this crap
never has to disassemble it 10-50 years later. If only they'd put
anti-sieze on it in the first place...
Yes, that's one of the larger questions. I've no idea how badly stuck
the threads are.
Will calipers fit down in there to get good measurements to mill one
up? Find the Old Guy at the ACE near you and ask him, or an ancient
plumber.
The one ancient plumber I talked to said "You've got a problem".
All the rest seem to be dead or retired.
My calipers won't fit, but I can get them close enough to have a pretty
good idea of the size. The flats are just under .750 across, the boss
OD is just under .875" across, the long thread (holds the decorative
cover on) is close to .625" in the photos at
http://www.zefox.net/~bp/shower_valve/
Thanks very much for the double-d tip!
bob prohaska