User Guide

Plumbing Design Assistance Manual l Chapter 3 – Fire-resistant construction l 21
Restricted load-bearing wood
stud and gypsum wall assembly
Maximum density of
Uponor ProPEX EP fittings
is 3.33 lbs. (1.51 kg) per cavity
Maximum density of Uponor PEX pipe
is 4.85 lbs. per linear feet (7.23 kg/m)
of cavity
Firestop listed to CAN/ULC-S115
(must be Uponor PEX pipe compatible)
Restricted load-bearing wood
joist floor/ceiling assembly with
maximum 2" Uponor PEX pipe
Optional concrete top pour
Multiport tee detail
Wood-frame floor/ceiling assembly (ITS Design No. UW/FCA 60-01/QAI Design No. P321-1F)
Wood-stud wall assembly (ITS Design No. UW/WA 60-02/QAI Design No. P321-1B)
• Uponor AquaPEX (up to 3")
• Wirsbo hePEX (up to 4")
• Pre-insulated Uponor AquaPEX
(up to 2" pipe with 2" thick insulation)
• Pre-insulated Wirsbo hePEX
(up to 2" pipe with 2" thick insulation)
• Uponor AquaPEX Reclaimed Water
(up to 2")
Wood-frame assemblies (Canada)
Figure 3-4: Multiport tee detail