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Home > Parts > Airless: Wagner > Piston > 935 & 945 > Prime Spray Valve Assembly
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Prime Spray Valve Assembly Replacement Kit 0512250 - click to enlarge

Prime Spray Valve Assembly Replacement Kit 0512250

0512250$35.99Quantity:

Old Vs New This newer 90 degree prime spray valve kit upgrades/replaces the older "Set Screw" style prime/spray assemblies. The 90 degree is a better design. The older set screw knobs were bad about stripping.
These newer 90 degree ones almost never come off. (unless you hit them with a hammer or such) The 90 degree uses a retaining clip as shown in the image to the right.
Easy part to put on, takes us about 2 minutes, a first timer would take about 5 mins. Main thing is to look at the instructions and put the parts on in the order the instructions show before you put them retaining clips on. (The retaining clips hold very well and are hard to pull off, so get it right before you slip the retaining ring (rings) on.) TIP: A small socket works well to press on the retaining clip.

Includes all the little parts as shown in the color picture at top of page including:
  • 1 Seat
  • 1 Stem/Ball Assembly
  • 1 Spring
  • 1 Star Washer
  • 1 Hex Nut
  • 1 Cam
  • 1 Knob
  • 2 Retaing Clips
    (you only need to install one)


This fits all the Wagner / SprayTech pumps listed in this section.(if you found this part in a section that is) And many more! Fits about 90% of all Wagner pumps!
Including (but not limited to) 404+, 833, 834, 844, 505, 3566, 847, 4785, 9140, 9150, 9170, 9190, 1700, 1900, 9210, 9250, EP2105, EP2205, 965, 945, etc.etc.

Only pumps we know it does not fit is the older HP/ST (1250 and Super Stinger) style diaphragm pumps, and the big commercial piston pumps that use the dump valves like Ep2510,2400,2300 etc.

Reference Links:

Printable Prime Spray Valve Installation Instructions (pdf) File Size=144KB



Page 1 instructions Image (gif)
Page 1 instructions Image (gif)

Page 2 instructions Image (gif)
Page 2 instructions Image (gif)

Thin Wrench (for Prime Spray Valves)
Thin Wrench (for Prime Spray Valves)

GP-Thin-Wrench$8.99Quantity:

Prime Spray Valve Assembly Replacement Kit 0512250

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