Comparison
CPVC Hot Water Pipe vs PETG
A side-by-side comparison of Chlorinated Polyvinyl Chloride for Hot Water Piping and Polyethylene Terephthalate Glycol.
Physical
Density
1.50-1.65 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.1-0.5 %
0.13 %
Transparency
Opaque
Transparent
Shrinkage
0.5-1.5 %
0.2 – 0.5 %
Mechanical
Young's Modulus
2.0-3.5 GPa
2.1 GPa
Tensile Strength
45-55 MPa
50 MPa
Elongation at Break
15-30 %
120 %
Impact Strength (Izod)
20-40 J/m
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
90-110 °C
80 °C
Melting Point
N/A (degrades)
—
Continuous Service Temperature
70-90 °C
65 °C
Heat Deflection Temperature
80-100 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.5-4.0
3.3
Volume Resistivity
10¹⁰-10¹² Ω⋅cm
10¹⁴ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Excellent resistance
Good
Bases
Excellent resistance
Fair
Solvents
Attacked by ketones, esters, chlorinated and aromatic hydrocarbons
—
UV Resistance
Poor (requires stabilization)
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Recyclable (challenging)
Recyclable
Recycling Code
3 (PVC)
1
Carbon Footprint
Moderate to High
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %