A quick picture of the issue: New construction, 2nd floor, full bath. Brand new Moen Posi-Temp shower assembly. All copper pipes.
After installation (done by our plumbing subcontractor) turning on the water caused a steady stream of water to come out of the spout and a very steady flow from the shower head.
Plumber diagnosed that we had a water pressure problem. This was confirmed with use of a water pressure guage (90 psi). This problem was resolved with a pressure regulator. Now the house water pressure is about 50 psi.
Unfortunately, the shower problem persists. I spoke with the fine folks at Moen (we otherwise love their products) and confirmed that the distances from the valve to the spout and shower head were within the ranges for this product.
The Moen folks thought perhaps the cartridge for inside the valve was faulty. A replacement was sent and installed - still...same problem.
Exasperated, the Moen folks suggested perhaps the pipe from the valve to the spout had a blockage of some sort. We removed the pipe...looked insde with a flashlight, no blockages.
Any thoughts? Anything obvious we've missed.
In order to mitigate the problem, Moen sold us a very nice flow control valve for the shower head - this stop the water from coming out of the shower head, but there's still a trickle and frankly the flow coming out of the spout is not very strong (IMHO).