PEX Tubing Technical Specifications and General Installation Recommendations
Dimensional data and specifications
| Tubing size | OD | Wall thickness | ID | Voulme gal/100ft | Weight lbs/100ft |
| 3/8" | 0.500 | 0.070 | 0.350 | 0.50 | 4.50 |
| 1/2" | 0.625 | 0.070 | 0.475 | 0.92 | 5.80 |
| 5/8" | 0.750 | 0.083 | 0.574 | 1.34 | 8.38 |
| 3/4" | 0.875 | 0.097 | 0.677 | 1.83 | 11.00 |
| 1" | 1.125 | 0.125 | 0.863 | 3.03 | 17.06 |
Pressure Ratings
100psi at 180F
160psi at 74F
Pressure Testing (for PEX tubing installation in concrete slabs)
Prior to pouring the cement, PEX tubing is pressure tested at 100 psi OR 1.5 times the operating pressure (whichever is greater) for 30 minutes minimum.
During the pour, pressure is maintained at 30psi and monitored to assure the systems' integrity.
Pressure Drop Table (psi per 100ft of tubing length)
| Flow rate, GPM | PEX tubing size | ||||
| 3/8" | 1/2" | 5/8" | 3/4" | 1" | |
| 0.5 | 2.50 | 0.51 |
0.21 | 0.05 | 0.02 |
| 1.0 | 7.50 | 1.70 | 0.71 | 0.34 | 0.10 |
| 2.0 | 26.1 | 5.30 | 2.12 | 1.02 | 0.35 |
| 3.0 | 54.1 | 11.0 | 4.36 | 2.10 | 0.63 |
| 4.0 | 18.4 | 7.36 | 3.53 | 1.06 | |
| 5.0 | 27.4 |
11.0 | 5.26 | 1.58 | |
| 6.0 | 38.1 | 15.3 | 7.30 | 2.19 | |
| 7.0 | 20.1 | 9.63 | 2.89 | ||
| 8.0 | 25.6 | 12.3 |
3.68 | ||
| 9.0 | 31.7 | 15.1 | 4.55 | ||
| 10.0 | 18.3 | 5.50 | |||
| 11.0 | 21.7 | 6.52 | |||
| 12.0 | 25.4 | 7.63 | |||
| 13.0 | 8.81 | ||||
| 14.0 | 10.1 | ||||
| 15.0 | 11.4 | ||||
| 16.0 | 12.8 | ||||
| 17.0 | 14.3 | ||||
| 18.0 | 15.8 | ||||
| 19.0 | 17.5 | ||||
1 psi = 0.434 ft of head (for fresh water), or
1 ft of head = 2.3 psi
Recommended circuit length
| Tubing size | Recommended circuit length |
Maximum circuit length |
| 3/8" | 200ft | 250ft |
| 1/2" | 300ft | 350ft |
| 5/8" | 400ft | 500ft |
| 3/4" | 500ft | 600ft |
| 1" | 750ft | 750ft |
Minimum bending radius
| Tubing size | Minimum bending radius |
Minimum bending diameter (OC) |
| 3/8" | 4" | 8" |
| 1/2" | 5" | 10" |
| 5/8" | 6" | 12" |
| 3/4" | 7" | 14" |
| 1" | 9" | 18" |
Fluid Temperatures
140F max. for structural and non-structural concrete / gypsum / thermal mass slabs.
160F max. for subfloor installations (consult with flooring manufacturer)
180F max. for baseboard and cast iron radiators
Connection System and Compatibility
This PEX tubing should be used with Crimp or Clamp type connection systems:
- Crimp system: Crimp Tool + Copper Crimp Rings + Crimp style PEX Fittings.
- Clamp (Cinch) system: Clamp Tool + Stainless Steel Clamps + Crimp style PEX Fittings.
Also compatible with:
- Cash Acme SharkBite® Push-Fit fittings
- Viega Pro-Press® Press system
- Compression type PEX fittings
Standards, Approvals & Certifications
ASTM F876: Standard Specification for Crosslinked Polyethylene (PEX) Tubing.
ASTM F877: Standard Specification for Crosslinked Polyethylene (PEX) Plastic Hot- and Cold- Water Distribution Systems.
ASTM F2023: Oxydative resistance of PEX to Hot Chlorinated Water per NSF protocol P171 (Non-Barrier PEX Tubing).
CSA B137.5: Crosslinked Polyethylene (PEX) Tubing Systems for Pressure Applications
NSF/ANSI 14, nsf-rfh: Evaluated for use in Radiant Floor Heating (NSF-rfh) Applications (Oxygen Barrier PEX tubing)
NSF/ANSI 61, nsf-pw: Complies with NSF/ANSI standard 61 for Drinking Water System Components (Non-Barrier PEX Tubing)
UPC listed by IAPMO (International Association of Plumbing and Mechanical Officials).
For all Oxygen Barrier PEX Tubing sizes and lengths, click here
For all Non-Barrier (Plumbing) PEX Tubing sizes and lengths, click here
