Average Initial Set Time Schedule
Below is our recommended initial set schedule and joint cure schedule for piping when using Spears® PVC and CPVC Low VOC cements. The initial set schedule table uses ambient temperature ranges and pipe diameter sizes to approximate the waiting time needed after applying pipe glue before handling new joints, fittings and valves. The initial set indicates a joint should accept the stress experienced during normal installation. When setting in damp, humid weather, allow for 50% more time until set.
| Temperature Range | Pipe Size 1/2" - 1 1/4" | Pipe Size 1 1/2" - 2" | Pipe Size 2 1/2" - 8" | Pipe Size 10" - 15" | Pipe Size 15+" |
| 60 - 100°F (16 - 38°C) | 2 Minutes | 5 Minutes | 30 Minutes | 2 Hours | 4 Hours |
| 40 - 60°F (5 - 16°C) | 5 Minutes | 10 Minutes | 2 Hours | 8 Hours | 16 Hours |
| 0 - 40°F (-18 - 5°C) |
10 Minutes | 15 Minutes | 12 Hours | 24 Hours | 48 Hours |
Average Initial Joint Cure Time Schedule
The joint cure schedule table uses ambient temperature ranges and expected pipe pressure ratings when in use to approximate the waiting time needed after cement before pressurizing a new plumbing system. Do not seek to pressurize a newly jointed system until at least the allotted approximate time. When curing in damp, humid weather, allow for 50% more time until cure.
| Relative Humidity 60% or Less | Pipe Size 1/2" - 1 1/4" | Pipe Size 1 1/2" - 2" | Pipe Size 2 1/2" - 8" | Pipe Size 10" - 15" | Pipe Size 15+" | |||
| Temperature Range | Up to 160 PSI | 160 PSI to 370 PSI | Up to 160 PSI | 160 PSI to 370 PSI | Up to 160 PSI | 160 PSI to 370 PSI | Up to 100 PSI | Up to 100 PSI |
| 60 - 100°F (16 - 38°C) | 15 Minutes | 6 Hours | 30 Minutes | 12 Hours | 1.5 Hours | 24 Hours | 48 Hours | 72 Hours |
| 40 - 60°F (5 - 16°C) | 20 Minutes | 12 Hours | 45 Minutes | 24 Hours | 4 Hours | 48 Hours | 96 Hours | 6 Days |
| 0 - 40°F (-18 - 5°C) | 30 Minutes | 48 Hours | 1 Hour | 96 Hours | 72 Hours | 8 Days | 8 Days | 14 Days |
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