Product Description
Armstrong Impeller Washer (Impeller capscrew washer) – Part No. 425742-001
Genuine Armstrong replacement impeller washer, Armstrong part number 425742-001, for Series 4380, 4360, 4280, 4280-50, 4030, 4300 pumps. Shown as item 83 on the Series 4380 drawing (parts list 6043.129 / 6043.130) – highlighted in the pictures above.
Specification: Impeller capscrew washer
Fits these Armstrong pumps
- Series 4380 (vertical in-line) – pump sizes 1½ × 1½ × 6, 2 × 2 × 6, 3 × 3 × 6, 4 × 4 × 6W, 1½ × 1½ × 8, 2 × 2 × 8, 3 × 3 × 8, 4 × 4 × 8, 5 × 5 × 8, 6 × 6 × 8W, 8 × 8 × 8, 1½ × 1½ × 10, 2 × 2 × 10, 3 × 3 × 10, 4 × 4 × 10, 6 × 6 × 10, 4 × 4 × 11½
- Designation: 'S'
- Motor frames: 143JM, 145JM, 182JM, 184JM, 213JM, 215JM, 56C
- Drawing item: 83
- Series 4360 (vertical motor mounted) – pump sizes 1½ D, 2 D, 3 D
- Drawing item: 83
- Series 4280 (close coupled end suction) – pump sizes 1½ × 1 × 6, 3 × 1½ × 6, 3 × 2 × 6, 3 × 2½ × 6, 4 × 3 × 6W, 1½ × 1 × 8, 3 × 1½ × 8, 3 × 2 × 8, 3 × 2½ × 8, 4 × 3 × 8, 5 × 4 × 8, 6 × 4 × 8W, 8 × 8 × 8, 2 × 1 × 10, 2 × 1½ × 10, 3 × 1½ × 10, 3 × 2 × 10, 3 × 2½ × 10, 4 × 3 × 10, 4 × 3 × 11½
- Designation: 'S'
- Motor frames: 143JM, 145JM, 182JM, 184JM, 213JM, 215JM
- Drawing item: 83
- Series 4280-50 (pool & spa (NSF-50)) – pump sizes 1½ × 1 × 6, 3 × 1½ × 6, 3 × 2 × 6, 3 × 2½ × 6, 4 × 3 × 6, 1½ × 1 × 8, 3 × 1½ × 8, 3 × 2 × 8, 3 × 2½ × 8, 4 × 3 × 8, 5 × 4 × 8, 6 × 4 × 8, 8 × 8 × 8, 2 × 1 × 10, 2 × 1½ × 10, 3 × 1½ × 10, 3 × 2 × 10, 3 × 2½ × 10, 4 × 3 × 10
- Designation: 'S'
- Motor frames: 143JM, 145JM, 182JM, 184JM, 213JM, 215JM
- Drawing item: 83
- Series 4030 (base mounted end suction) – pump sizes 1½ × 1 × 6, 3 × 1½ × 6, 3 × 2 × 6, 3 × 2½ × 6, 4 × 3 × 6, 6 × 6 × 6, 1½ × 1 × 8, 3 × 1½ × 8, 3 × 2 × 8, 3 × 2½ × 8, 4 × 3 × 8, 5 × 4 × 8W, 6 × 4 × 8W, 6 × 5 × 8, 8 × 8 × 8, 2 × 1 × 10, 2 × 1½ × 10, 3 × 1½ × 10, 3 × 2 × 10, 3 × 2½ × 10, 4 × 3 × 10, 5 × 4 × 10, 6 × 4 × 10, 6 × 5 × 10, 4 × 3 × 11½, 5 × 4 × 11½, 6 × 5 × 11½
- Designation: 'S'
- Motor frames: 56, 143T, 145T, 182T, 184T, 213T, 215T, 254T, 256T
- Drawing item: 83
- Series 4300 (vertical in-line) – pump sizes 1½ × 1½ × 6, 2 × 2 × 6, 3 × 3 × 6, 4 × 4 × 6, 1½ × 1½ × 8, 2 × 2 × 8, 3 × 3 × 8, 4 × 4 × 8, 5 × 5 × 8, 6 × 6 × 8, 8 × 8 × 8, 2 × 2 × 10, 3 × 3 × 10, 4 × 4 × 10, 6 × 6 × 10, 8 × 8 × 10, 4 × 4 × 11½, 5 × 5 × 11½, 6 × 6 × 11½, 8 × 8 × 11½
- Designation: 'S'
- Motor frames: 143TC, 145TC, 182TC, 184TC, 213TC, 215TC, 254TC, 256TC
- Drawing item: 83
Other parts for this pump
Rebuilding a Series 4380 1½ × 1½ × 6? These parts are often replaced at the same time:
Showing 24 of 31 parts – see the full list in the parts finder.
Not sure this is the right part?
Use our Armstrong Pump Parts Finder: choose Series 4380, your pump size and motor to see every part on the drawing. Or send us your pump’s nameplate details – call (416) 236-2338 or email sales@bramhambros.com. Bramham Bros is an authorized Armstrong dealer.
Product Videos
Custom Field
Brand Armstrong
Armstrong Part Number 425742-001
Part Type Hardware / Fitting
Fits Series 4380 1-1/2 x 1-1/2 x 6, 2 x 2 x 6, 3 x 3 x 6, 4 x 4 x 6W, 1-1/2 x 1-1/2 x 8, 2 x 2 x 8, 3 x 3 x 8, 4 x 4 x 8, 5 x 5 x 8, 6 x 6 x 8W, 8 x 8 x 8, 1-1/2 x 1-1/2 x 10, 2 x 2 x 10, 3 x 3 x 10, 4 x 4 x 10, 6 x 6 x 10, 4 x 4 x 11-1/2
Fits Series 4360 1-1/2 D, 2 D, 3 D
Fits Series 4280 (1) 1-1/2 x 1 x 6, 3 x 1-1/2 x 6, 3 x 2 x 6, 3 x 2-1/2 x 6, 4 x 3 x 6W, 1-1/2 x 1 x 8, 3 x 1-1/2 x 8, 3 x 2 x 8, 3 x 2-1/2 x 8, 4 x 3 x 8, 5 x 4 x 8, 6 x 4 x 8W, 8 x 8 x 8, 2 x 1 x 10, 2 x 1-1/2 x 10, 3 x 1-1/2 x 10, 3 x 2 x 10, 3 x 2-1/2 x 10
Fits Series 4280 (2) 4 x 3 x 10, 4 x 3 x 11-1/2
Fits Series 4280-50 (1) 1-1/2 x 1 x 6, 3 x 1-1/2 x 6, 3 x 2 x 6, 3 x 2-1/2 x 6, 4 x 3 x 6, 1-1/2 x 1 x 8, 3 x 1-1/2 x 8, 3 x 2 x 8, 3 x 2-1/2 x 8, 4 x 3 x 8, 5 x 4 x 8, 6 x 4 x 8, 8 x 8 x 8, 2 x 1 x 10, 2 x 1-1/2 x 10, 3 x 1-1/2 x 10, 3 x 2 x 10, 3 x 2-1/2 x 10
Fits Series 4280-50 (2) 4 x 3 x 10
Fits Series 4030 (1) 1-1/2 x 1 x 6, 3 x 1-1/2 x 6, 3 x 2 x 6, 3 x 2-1/2 x 6, 4 x 3 x 6, 6 x 6 x 6, 1-1/2 x 1 x 8, 3 x 1-1/2 x 8, 3 x 2 x 8, 3 x 2-1/2 x 8, 4 x 3 x 8, 5 x 4 x 8W, 6 x 4 x 8W, 6 x 5 x 8, 8 x 8 x 8, 2 x 1 x 10, 2 x 1-1/2 x 10, 3 x 1-1/2 x 10
Fits Series 4030 (2) 3 x 2 x 10, 3 x 2-1/2 x 10, 4 x 3 x 10, 5 x 4 x 10, 6 x 4 x 10, 6 x 5 x 10, 4 x 3 x 11-1/2, 5 x 4 x 11-1/2, 6 x 5 x 11-1/2
Fits Series 4300 (1) 1-1/2 x 1-1/2 x 6, 2 x 2 x 6, 3 x 3 x 6, 4 x 4 x 6, 1-1/2 x 1-1/2 x 8, 2 x 2 x 8, 3 x 3 x 8, 4 x 4 x 8, 5 x 5 x 8, 6 x 6 x 8, 8 x 8 x 8, 2 x 2 x 10, 3 x 3 x 10, 4 x 4 x 10, 6 x 6 x 10, 8 x 8 x 10, 4 x 4 x 11-1/2, 5 x 5 x 11-1/2
Fits Series 4300 (2) 6 x 6 x 11-1/2, 8 x 8 x 11-1/2
Drawing Item 4030: item 83; 4280: item 83; 4300: item 83; 4360: item 83; 4380: item 83; 4280-50: item 83
Specification Impeller capscrew washer
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