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