TESTING PVC PRESSURE PIPE

The testing procedures and requirements are usually stated in the project specifications.  The following are Northern Pipe Products Inc. recommendations for testing PVC pressure pipe:

  1. The testing connection location should be at the lowest point of the line to be tested.
  2. Be sure all blocking is in place (if concrete is used it must be cured to the necessary strength to withstand the pressure).
  3. Pipe must be back-filled properly before testing.
  4. The ends must be capped and blocked.
  5. Absolutely do not use air pressure for testing .  Only hydrostatic testing is recommended.
  6. Flush lines thoroughly to remove as much existing air as possible. If air pockets remain, it will be very difficult to complete testing.
  7. Pipe should not be tested beyond 100% of the pressure rating of the pipe.
  8. The leakage allowance can be calculated from the chart on the next page.
  9. If the quantity of pipe to be tested is large, the test should be done in sections.
  10. If the pipe is to be tested before it is tied to a final water source, an alternate water source may be needed.  The quantity of water to fill the line can be determined from the chart on the next page.

VOLUME OF WATER REQUIRED IN GALLONS PER 100 FEET OF PIPE

Pipe Size

US Gallons Per 100 Feet

1 1/2"

13 gallons

2"

20 gallons

2 1/2"

29 gallons

3"

43 gallons

4"

70 gallons

6"

153 gallons

8"

259 gallons

10"

405 gallons

12"

573 gallons

.

ALLOWABLE LEAKAGE FOR PVC PLASTIC PIPE
 WITH ELASTOMERIC JOINTS IN US GALLONS PER HOUR PER 50 JOINTS

Pipe Size

Average 50

Test 100

Pressure 150

(PSI) 200

1 1/2"

.07

.10

.12

.14

2"

.10

.14

.17

.19

2 1/2"

.12

.17

.21

.24

 3"

.14

.20

.25

.29

 4"

.19

.27

.33

.38

 6"

.29

.41

.50

.57

8"

.38

.54

.66

.76

10"

.478

.68

.83

.96

12"

.57

.81

.99

1.15