Armstrong Pump Model 4280 Repair Kit 4280S-11-1/2

Armstrong pump model 4280 repair kit P/N 4280S-11-1/2

Includes casing gasket, stainless shaft sleeve, mechanical seal

Kit used with small size new style 4280 pump models:

4280 4x3x11.5,  with 1150 RPM motor 2 HP and smaller

4280 4x3x11.5,  with 1750 RPM motor 5 HP and smaller

4280 4x3x11.5,  with 3500 RPM motor 7-1/2 HP and smaller

Genuine Armstrong pump parts

Shipping rate for continental United States

$569.00

Add to Cart:
  • Model: 4280S-11-1/2
  • Manufactured by: Armstrong Pump
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June 1, 2025 by Hugh O. (United States)
“This is the third time we have ordered from Shorty's. Excellent service as usual.”
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May 26, 2025 by Dale F. (OH, United States)
“I always buy my furnace filters from Shorty's. Site is easy to use with quick delivery and a good price.”
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May 25, 2025 by Luis R. (United States)
“If your looking for hard to find pieces and better prices this is the place.”

Manufacturer Info

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