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, pools, spas, plumbing, waste water 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" - 2" have factory pressed on handles
  • 2" & 4" have internal snap locks for gate locking in open position
  • Vacuum: 0" Hg in closed position & 7" Hg in 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
1" Socket x Socket White Knife Gate Valve
$12.08​/Each
Save 5%4+$11.47/Each
Save 10%8+$10.87/Each
Save 15%24+$10.26/Each
P-391
$12.08​/Each
In Stock
1-1/2" MIP x FIP Black Knife Gate Valve
21057
1-1/2" MIP x FIP Black Knife Gate Valve
$12.44​/Each
Save 5%4+$11.81/Each
Save 10%8+$11.19/Each
Save 15%24+$10.57/Each
P-391
$12.44​/Each
In Stock
1-1/2" Socket x Socket White Knife Gate Valve
21058
1-1/2" Socket x Socket White Knife Gate Valve
$12.08​/Each
Save 5%4+$11.47/Each
Save 10%8+$10.87/Each
Save 15%24+$10.26/Each
P-391
$12.08​/Each
In Stock
1-1/2" FIP x FIP Black Knife Gate Valve
21059
1-1/2" FIP x FIP Black Knife Gate Valve
$12.44​/Each
Save 5%4+$11.81/Each
Save 10%8+$11.19/Each
Save 15%24+$10.57/Each
P-391
$12.44​/Each
On Order
1-1/2" Pool Hose x MIP White Knife Gate Valve
21060
1-1/2" Pool Hose x MIP White Knife Gate Valve
$12.44​/Each
Save 5%4+$11.81/Each
Save 10%8+$11.19/Each
Save 15%24+$10.57/Each
P-391
$12.44​/Each
In Stock
2" Socket x Socket White Knife Gate Valve
21082
2" Socket x Socket White Knife Gate Valve
$16.17​/Each
Save 5%4+$15.36/Each
Save 10%8+$14.55/Each
Save 15%24+$13.74/Each
P-391
$16.17​/Each
In Stock
3" Socket x Socket Gray Knife Gate Valve
21083
3" Socket x Socket Gray Knife Gate Valve
$58.58​/Each
Save 5%4+$55.65/Each
Save 10%8+$52.72/Each
Save 15%24+$49.79/Each
P-391
$58.58​/Each
In Stock
4" Socket x Socket Gray Knife Gate Valve
21084
4" Socket x Socket Gray Knife Gate Valve
$112.30​/Each
Save 5%4+$106.68/Each
Save 10%8+$101.07/Each
Save 15%24+$95.45/Each
P-391
$112.30​/Each
On Order
1-1/2" Socket x Spigot White Knife Gate Valve
21334
1-1/2" Socket x Spigot White Knife Gate Valve
$12.08​/Each
Save 5%4+$11.47/Each
Save 10%8+$10.87/Each
Save 15%24+$10.26/Each
P-391
$12.08​/Each
In Stock
2" Socket x Spigot White Knife Gate Valve
21335
2" Socket x Spigot White Knife Gate Valve
$16.10​/Each
Save 5%4+$15.29/Each
Save 10%8+$14.49/Each
Save 15%24+$13.68/Each
P-391
$16.10​/Each
In Stock