Armstrong 4280 M-11-1/2JM 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 11-1/2" gasket P/N 426401-004

Stainless sleeve kit P/N 810150-255

Mechanical seal P/N 975000-984

This kit works only with  motors with JM in motor frame number. Motors with JP in motor frame number will require a different sleeve kit

OEM Armstrong pump parts

Shipping rate for continental USA

 

$665.00

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  • Model: 4280M-11-1/2JM
  • 26000 Units in Stock
  • Manufactured by: Armstrong
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December 3, 2025 by A Reviewer (United States)
“Always easy to order the filters that I need.”
Verified Buyer
November 29, 2025 by Julie E. (Frederick, MD, United States)
“I searched for a replacement draft inducer assembly with housing. Many places sold separate pieces/smaller kits. I liked the option offered on Shorty's HVAC. I ordered on a weekend, and patiently waited for it to arrive. Packaging was great, and product was as described/brand new. Swapping out was not too bad! My only suggestion is to offer FedEx shipping (in addition to current type) so that these quality parts can get to the site ASAP.”
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November 26, 2025 by William L. (Florida, United States)
“I could find and purchase my product with ease. Thanks.”

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