Praher Knife Gate Valves

These inexpensive valves for industrial, agricultural, and commercial markets are ideal for quick shut-off in low pressure or vacuum lines. These valves are great for use in irrigation systems, pools, spas, plumbing, wastewater control, septic systems, IBC products, aquaculture, tank drain valves, and carpet/extraction equipment.

  • White or gray PVC, or black ABS
  • Santoprene™ (TPE) lip-type seals & EPDM O-rings
  • 303/AA stainless steel shaft & hardware
  • 3" & 4" have glass-reinforced polypropylene handles & double O-ring shaft seals
  • 3" & 4" come standard with the gatekeeper safety clip to prevent unintentional closing
  • 1" to 2" have factory-pressed on handles
  • 2" & 4" have internal snap locks for gate locking in an open position
  • Vacuum: 0 in. Hg in a closed position & 7 in. Hg in an open position
  • Maximum pressure @ 70°F: 50 psi (1-1/2" to 2-1/2") & 40 psi (3" to 4")
Stock Description Catalog Pg. Price
1" Socket x Socket White Knife Gate Valve
21333
$12.75​/Each
Save 5%4+$12.11/Each
Save 10%8+$11.47/Each
Save 15%24+$10.83/Each
P-455
$12.75​/Each
1-1/2" MIP x FIP Black Knife Gate Valve
21057
$13.14​/Each
Save 5%4+$12.48/Each
Save 10%8+$11.82/Each
Save 15%24+$11.16/Each
P-455
$13.14​/Each
1-1/2" Socket x Socket White Knife Gate Valve
21058
$12.75​/Each
Save 5%4+$12.11/Each
Save 10%8+$11.47/Each
Save 15%24+$10.83/Each
P-455
$12.75​/Each
1-1/2" FIP x FIP Black Knife Gate Valve
21059
$13.14​/Each
Save 5%4+$12.48/Each
Save 10%8+$11.82/Each
Save 15%24+$11.16/Each
P-455
$13.14​/Each
1-1/2" Pool Hose x MIP White Knife Gate Valve
21060
$13.14​/Each
Save 5%4+$12.48/Each
Save 10%8+$11.82/Each
Save 15%24+$11.16/Each
P-455
$13.14​/Each
2" Socket x Socket White Knife Gate Valve
21082
$17.07​/Each
Save 5%4+$16.21/Each
Save 10%8+$15.36/Each
Save 15%24+$14.51/Each
P-455
$17.07​/Each
3" Socket x Socket Gray Knife Gate Valve
21083
$61.88​/Each
Save 5%4+$58.78/Each
Save 10%8+$55.69/Each
Save 15%24+$52.59/Each
P-455
$61.88​/Each
4" Socket x Socket Gray Knife Gate Valve
21084
$113.14​/Each
Save 5%4+$107.48/Each
Save 10%8+$101.82/Each
Save 15%24+$96.16/Each
P-455
$113.14​/Each
1-1/2" Socket x Spigot White Knife Gate Valve
21334
$12.75​/Each
Save 5%4+$12.11/Each
Save 10%8+$11.47/Each
Save 15%24+$10.83/Each
P-455
$12.75​/Each
2" Socket x Spigot White Knife Gate Valve
21335
$17.00​/Each
Save 5%4+$16.15/Each
Save 10%8+$15.30/Each
Save 15%24+$14.45/Each
P-455
$17.00​/Each

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