Armstrong 4280 S-10 Repair Kit

Kit to replace seal in Armstrong Model 4280 New Style circulator.

New style circulator can be determined by the discharge line being in the center of the volute. The old style design has the discharge line offset to on side.

Includes 10" casing gasket

Stainless shaft sleeve

Mechanical seal 

Correct seal replacement kit for:

4280 2x1x10,   4280 3x1.5x10,   4280 3x2x10,   4280 3x2.5x10,   4280 4x3x10,   with 1150 RPM motor 2 HP and smaller

4280 2x1x10,   4280 3x1.5x10,   4280 3x2x10,   4280 3x2.5x10,   4280 4x3x10,   with 1750 RPM motor 5 HP and smaller

4280 2x1x10,   4280 3x1.5x10,   4280 3x2x10,   4280 3x2.5x10,   4280 4x3x10,   with 3500 RPM motor 7-1/2 HP and smaller

Shipping rate for continental USA

$552.00

Add to Cart:
  • Model: 4280S-10
  • 29000 Units in Stock
  • Manufactured by: Armstrong
Ask a Question
We're currently collecting product reviews for this item. In the meantime, here are some reviews from our past customers sharing their overall shopping experience.
4.9
Out of 5.0
A graph showing this site's review totals.
Overall Rating
98%
of customers that buy
from this merchant give
them a 4 or 5-Star rating.
Verified Buyer
May 3, 2025 by Johanna S. (United States)
“I've used Short's for years and have always been pleased with customer service and products.”
Verified Buyer
May 2, 2025 by Gitaben P. (United States)
“qyuic fast and easy”
Verified Buyer
May 1, 2025 by A Reviewer (United States)
“Josh was a great help in getting me the right part number that I needed.”

Manufacturer Info

(image for) Armstrong