Drop Pipe

Silver-Line offers drop pipe in both Sch 80 and Sch 120 (Threaded, Both Ends). These products are traditionally used in Well and Pump applications.

All threaded pipe is supplied with a plastic cap on each end to protect the thread until installation.
Silver-Line threaded pipe offers ease of installation with a chamfered and beveled end to ease the initial coupling of the threads and allow better tightening.

Warning: Do NOT use PVC piping systems to store or convey compressed air. Doing so may cause the PVC to shatter explosively and unexpectedly, resulting in severe injury and damage

Standard Compliances:

  • ASTM D-1785, standard for pressure pipe

Schedule 80 White – Threaded

Schedule 80 White

Nominal Size Item Number Outside Diameter Min. Wall Thickness Inside Diameter (Value) Max Working Pressure at 73º F Wt/100' Ft/Pallet
1" 16.102 1.315 0.179 0.957 THD 320 PSI / PE 630 PSI 40 5,200
1-1/4" 16.122 1.660 0.191 1.278 THD 260 PSI / PE 520 PSI 55 5,000
1-1/2" 16.152 1.900 0.200 1.500 THD 240 PSI / PE 470 PSI 68 1,800
2" 16.202 2.375 0.218 1.939 THD 200 PSI / PE 400 PSI 94 1,400

*20 ft. Lengths

Schedule 120 White – Threaded

Schedule 120 White

Nominal Size Item Number Outside Diameter Min. Wall Thickness Inside Diameter (Value) Max Working Pressure at 73º F Wt/100' Ft/Pallet
1" 17.102 1.315 0.200 0.915 THD 360 PSI / PE 720 PSI 44 5,200
1-1/4" 17.122 1.660 0.215 1.230 THD 300 PSI / PE 600 PSI 61 5,000

*20 ft. Lengths

Horsepower Rating and Depth Chart for PVC Threaded Drop Pipe

Maximum Depth - Based on Discharge Pressure*
Nominal Size Pressure Rating (psi) 30 psi 40 psi 50 psi 60 psi Maximum Flow Rate** Maximum H.P.
1" Sch 80 320 670 ft. 645 ft. 625 ft. 600 ft. 11 gpm 1.5
1-1/4" Sch 80 260 530 ft. 510 ft. 485 ft. 460 ft. 20 gpm 2
1-1/2" Sch 80 240 485 ft. 460 ft. 440 ft. 415 ft. 27 gpm 5
2" Sch 80 200 395 ft. 370 ft. 345 ft. 325 ft. 45 gpm 7.5
1" Sch 120 360 760 ft. 740 ft. 715 ft. 695 ft. 10 gpm 1.5
1-1/4" Sch 120 300 625 ft. 600 ft. 575 ft. 555 ft. 18 gpm 2

*Maximum depth recommendations are calculated per the formula below:
     Maximum Depth = (Pressure Rating of Pipe – Discharge Pressure) * 2.31
     Note: 1 psi = 2.31 ft.H2O
**Maximum Flow Rate is based on a water velocity of 5 ft/s to minimize excessive surge pressures.

We recommend that installers of Sch 80 or Sch 120 pipe in well applications should support the pump by using a cable or rope.
The length of the coupling used to join PVC threaded pipe should be at least 2 inches.
For the use of torque arrestors and centering devices, follow the manufacturer’s recommendations.