CPVC Pipe Sizing Calculator
Size CPVC piping for hot and cold water per UPC/IPC
CTS is most common for residential water supply
Fixture Count
System Parameters
Recommended Pipe Size
Minimum CPVC Size
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Flow Velocity
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Total WSFU
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Design Flow
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Friction Loss
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Pressure at Fixture
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Temperature Rating: CPVC rated to 200F at 100 PSI. Pressure rating decreases at higher temperatures.
CPVC CTS Size Reference
| Nominal | OD (in) | ID (in) | Max GPM |
|---|---|---|---|
| 1/2" | 0.625 | 0.485 | 4.6 |
| 3/4" | 0.875 | 0.705 | 9.7 |
| 1" | 1.125 | 0.911 | 16.3 |
| 1-1/4" | 1.375 | 1.107 | 24.0 |
| 1-1/2" | 1.625 | 1.291 | 32.7 |
| 2" | 2.125 | 1.695 | 56.3 |
CPVC Pressure/Temperature Ratings
73F
400 PSI (CTS)
Cold water max
140F
200 PSI (CTS)
Normal hot water
180F
100 PSI (CTS)
High temp limit
200F
80 PSI (CTS)
Maximum rated
CPVC Installation Guidelines
Support Spacing
- 1/2" - 3/4": 36" horizontal
- 1" - 1-1/4": 48" horizontal
- 1-1/2" - 2": 60" horizontal
- Vertical: Every floor
Expansion
- 1.2" per 100 ft per 50F
- Use expansion loops
- Flexible connections
- Never force alignment
Solvent Cement
- Use CPVC-specific cement
- One-step or two-step
- Full depth insertion
- 24 hr cure before pressure