Using a delta replacement spout, no problems with install, but when I pull the diverter up to enable the shower, I am getting enough blowback that water is leaking out of the back of the spout and through the caulk around the copper pipe where it comes through. There seems to be ample flow out of the shower head, but water some water is also coming out of the spout.
The only components are the spout, the brass sleeve that is threaded on the back end that the spout screws onto, and a bolt that holds that on via a small set screw (allen head). There is an O-ring on the forward end of the sleeve, which came with the sleeve.
Why is there soooo much water blowing back??