User Guide

52 l uponorengineering.com
Uponor Logic plumbing
Uponor Logic is the smart way to plumb, using exible Uponor PEX pipe and multiport tees to minimize connections and maximize
system performance. With an Uponor Logic layout, plumbing systems typically require fewer ttings than a trunk and branch design
and less pipe than a home run layout.
Uponor Logic
Number of fittings 9
Number of connections 33
Nominal pipe size Length (ft.)
½" 261
¾" 38
1" 5
Total 304
Table 5-1: Uponor Logic pipe and ttings usage
Home run
Number of fittings 7
Number of connections 27
Nominal pipe size Length (ft.)
½" 475
¾" 30
1" 5
Total 510
Table 5-2: Home run pipe and ttings usage
½" TYP
1" CW SUPPLY
½"
¾"
½" TYP
1" CW SUPPLY
¾"
Uponor
Logic
layout
Home
run
layout
Figure 5-3: Uponor Logic layout Figure 5-4: Home run layout
Critical path = HWS — W.H. to tub UPC tub = 4 wsfu = 4 gpm
CWS = 60°F HWS = 120°F Mixed = 110°F Hot-water multiplier = 0.83 = 3.32 gpm
System
type
I.D. (in.)
Distance
(ft.)
Volume (gal.)
Velocity
(ft./sec.)
Pressure loss (psi)
First-use
HW time to fixture
½" ¾" ½" ¾" ½" ¾" Total ½" ¾" ½" ¾" Total Critical path (tub only)
Copper T&B 0.527 0.745 13 33 0.147 0.746 0.893 4.8 2.43 1.22 0.561 1.781 16.1 sec.
Home run 0.475 0.671 32 9 0.294 0.165 0.459 5.8 3 4.16 0.252 4.412 8.3 sec.
Uponor Logic 0.475 0.671 19 17 0.174 0.312 0.486 5.8 3 2.47 0.476 2.946 8.7 sec.
Table 5-3: Performance comparisons