1. Irrigation Pipe

2. CPVC

3. Pressure Rating Standards
Rated pressure – amount of pressure (PSI) pipe can handle
Depends on pipe material, pipe’s diameter and wall thickness
Decreases significantly when water temps exceed 73 F

4. POLYVINYLCHLORIDE (PVC)
Semi-rigid plastic

5. POLYVINYLCHLORIDE (PVC)

6. POLYVINYLCHLORIDE (PVC)
Iron pipe size (IPS) – the common standard that pipe is sized to fit couplers
Plastic irrigation pipe (PIP) – less common

7. CLASSIFICATIONS OF PVC
SCHEDULE PVC
Pipe pressure ratings change with pipe diameter because wall thickness always the same

8. CLASSIFICATIONS OF PVC
SCHEDULE PVC
Sch. 40: white
Sch. 80: gray (thicker)
Sch 40 PVC 1” pipe has a rating of 450 PSI
Sch 40 PVC 4” pipe has a rating of 220 PSI

9. CLASSIFICATIONS OF PVC
SDR PVC
All diameters have same pressure rating
Class 200
All CL 200 pipes are 200 psi
Class 160
All CL 160 pipes are 160 psi

10. CLASSIFICATIONS OF PVC
SDR PVC
Standard dimension ratio-pressure rated
Wall thickness is adjusted to the pipe diameter
The larger the pipe, the thicker the wall

11. PIPE DIMENSIONS
OD controlled – inside diameter is changed to meet the wall thickness requirements
Used on PVC so that all pipe sizes of different thickness will fit in couplers

12. PVC LABEL
NSF – National Sanitary Foundation approved for potable water
PVC 1120 – pipe material
PSI at 73 F – pressure rating

13. CPVC Beige color Plumbing applications Requires CPVC glue
Fittings not interchangeable with PVC
Requires CPVC glue

14. POLYETHYLENE PIPE (PE)
Resistant to sunlight deterioration
Drip irrigation, some sprinklers
Connected by inserts or couplers
Flexibility adapts to freezing conditions

15. Pulling Pipe

21. SIZING PIPE too large
Economical
Smaller pipe costs less

22. SIZING PIPE too small Operational efficiency
When pipe is sized too small, water speed (velocity) is too fast
Lose pressure to friction loss

23. Pipe Damage Water hammer –force of water coming to abrupt stops
Eventually cracks tees and elbows from repeated force

24. Pipe Damage Water hammer Reinforce tees on large pipe
Open valves slowly
Properly sized pipes to reduce velocity

39. Solvent Welding Cleaner Primer (purple stuff) Cement (solvent weld)
Dirt and debris
Primer (purple stuff)
Chemically softens plastic
Often used instead of cleaner
Cement (solvent weld)
Chemically welds plastic together

40. Solvent Welding
Square cut
Bevel edge on >4” pipe

41. Solvent Welding
Prime
Outside of pipe
Inside of fitting

42. Solvent Welding
Cement
Outside of pipe
Inside of fitting

43. Solvent Welding Insert pipe Quarter turn Hold for 30 seconds
Wipe off excess

44. Solvent Welding Set and cure time varies Temperature and time
Colder takes longer
1” pipe cures in 15 minutes

45. PVC Components Slip fittings Socket (S) Spig (Sp) Glue together
“female”
Spig (Sp)
“male”
Usually the pipe end

46. PVC Components Threaded fittings Female pipe threads (FPT)
Screw together
Female pipe threads (FPT)
Male pipe threads (MPT)

47. PVC Components Threaded fittings
Teflon tape on constant pressure fittings
Apply clockwise

48. Adapter
Changes connection type

49. Reducer bushing
Reduces connection size
Fits into coupler

50. Coupler
Connects pipe

51. Elbow

52. Tee
Vulnerable to water hammer

53. Reducing Tee
1” x ¾” tee (S x FPT)

54. Cross

55. Telescopic Coupler
Repair coupler

56. Compression Coupler
Repair, no glue needed

57. Point of Connection
Install Compression Tee
Copper, PVC, or PEX