Tech
Data
PRODUCT SPECIFICATION SHEET
TD-PFVP 0307
VIEGA
301 N. Main, Floor 9
Wichita, KS 67202
Phone: 1-877-VIEGA-NA
Fax: 1-800-976-9817
service@viega.com
www.viega-na.com
2
ViegaPEX™
Quality Assurance
When the product is marked with the ASTM F876/F877
designation, it affirms that the product was manufactured,
inspected, sampled and tested in accordance with these
specifications and has been found to meet the specified
requirements.
Certifications
- tested for health effects to ANSI/NSF standard
61 and performance to ANSI/NSF standard 14.
NSF CL-R/CL-TD - Tested and conforms to NSF Protocol
P171, Chlorine Resistance of Plastic Piping Materials.
Meets and exceeds pass/fail criteria of both Traditional
Domestic and Domestic Continuous Recirculation ratings.
NSF tested according to ASTM Standard F2023, Evaluating
the Oxidative Resistance of Crosslinked Polyethylene (PEX)
Tubing and Systems to Hot Chlorinated Water greatly
exceeding the minimum chlorine resistance requirements of
ASTM F876.
- IAPMO Certified
- ICBO ER #5287 - listed for plumbing and
hydronic heating applications.
- Intertek Testing Services (Warnock Hersey) -
certification to CSA B137.5 (Canadian
Standards Association)
HUD (Housing and Urban Development) - MR 1276
Minimum Bend Radius
CORRECT:
8 x O.D.
INCORRECT:
PIPE FLATTENS
AT THE BEND
Pressure Drop Table
Expressed as PSI/ft. Pressure Drop
SIZE
GPM 3/8” 1/2” 3/4” 1”
1 .070 .016
1.5 .149 .034
2.2 .303 .069
2.5 .385* .087
3 .539 .122 .023
3.5 .717 .162 .030
4 .208* .039
5 .314 .059
6 .440 .082 .024
7 .586 .109 .032
8 .140 .041
9 .174* .051
10 .211 .062
11 .252 .074
12 .296 .087
13 .343 .101
14 .116
16 .148*
18 .184
20 .224
22 .267
*Indicates 8 fps maximum velocity required by some
plumbing codes. NOTE: Maximum flow for each size
based on 12 FPS velocity. PSI x 2.307 = head loss.
Minimum Burst Pressure (PSI) Per ASTM F876/F877
SIZE 73°F (23°C) 180°F (82°C)
3/8" 620 275
1/2" 480 215
3/4" 475 210
1" 475 210
EXAMPLE: To calculate the
pressure drop of a 1/2" line, 40 ft.
long, with a 3 gpm flow rate,
calculate .122 psi x 40 ft. = 4.9
psi pressure drop. Most
plumbing codes require 8 psi
residual pressure at the fixture.
Refer to your local code
requirements.
NOTE: ViegaPEX tubing may be bent to a minimum of 5 x O.D.
with approved bend support.
SDR-9 PEX Tubing
ASTM F876/F877/CTS-OD SDR-9
STOCK TUBING WALL NOM. WEIGHT VOLUME (
Gal.)
CODE SIZE O.D. THICKNESS I.D. PER FT PER 100 FT
PX2 3/8" 0.500±.003 0.070+.010 0.350 .0413 0.50
PX3 1/2" 0.625±.004 0.070+.010 0.475 .0535 0.92
PX4 3/4" 0.875±.004 0.097+.010 0.671 .1023 1.82
PX5 1" 1.125±.005 0.125+.013 0.863 .1689 3.04
NOTE: Dimensions are in English units. Tolerances
shown are ASTM requirements. ViegaPEX is
manufactured within these specifications.
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