Koa
In the Trades
I'm installing a Grohe Retro Shower System. It uses existing faucet and adds a diverted. It screws into existing shower arm fitting with a brass threaded fitting. Different length nipples are used to adjust length the brass fitting protrudes from wall to be within the small tolerance allowed. My in wall shower fitting is very close to the surface which means the shortest nipple is a close nipple. Basically the two fittings I’m connecting need to bottom out on one another. It seems like there’s no way to really make any adjustment to close nipple other than shortening it or sanding the threads a bit. Not sure if that would help on a tapered joint, plus not leak. I’m within about 1/8” too high. There won’t be much water pressure on fitting since it’s never shut off there. The other thing I’m concerned about is once I crank it down and it doesn’t tighten down enough is then getting it apart. I’ve installed five of these without running into this problem. This one is going on my shower so I can spend a bit of time on a solution. I’d rather not use two spacers to offset the entire unit from the wall. Sand/grind down close nipple and solder deeper into Grohe's fitting? Any ideas?
https://cdn.cloud.grohe.com/tpi/100...223.1512459419.1563914144-83155335.1563718177
https://cdn.cloud.grohe.com/tpi/100...223.1512459419.1563914144-83155335.1563718177