I am replacing a 10+ years 1400 series old valve body in which I sheared off (poorly designed as seen in middle picture) the 3 copper pipes connecting the valve body frame to the cartridge receptor drum, while trying to replace the RP19804 cartridge due to dripping shower head.
I bought the R10000-UNBX, as although all my pipes are PEX, I also would need elbow and outlet fittings anyway to reach my current pipe locations.
This is installed opposite the showerhead wall, in a knee-wall topped with glass enclosure, so the top outlet was capped off, and the shower was fed from the bottom outlet (as seen in 1st and 3rd pictures).
The old valve had a few inches of copper pipe before the PEX connection (1st & 3rd pic).
I also notice the RP10000 instructions mention the tub outlet (which I am using for shower only) drop pipe must be 8-18 inches copper only.
Is this initial copper length only required for the pull-diverter mechanism from bath-spout to shower, or is it still required in my application and why, or can I connect my PEX directly to the bottom outlet using an NPT-PEX adapter?
Age: 35 to 44
Project Type: Replacement
Ownership: < 1 year
Skill Level: Intermediate