Product Description
Armstrong Casing Drain Plug – Part No. 937105-203
Genuine Armstrong replacement casing drain plug, Armstrong part number 937105-203, for Series 4380, 4300, 4600 pumps. Shown as item 105 on the Series 4380 drawing (parts list 6043.129 / 6043.130) – highlighted in the pictures above.
* Please confirm before ordering: this number is printed this way in Armstrong’s Series 4380 parts list but looks inconsistent. Call us with your pump serial number to confirm.
- 5×5×8 appears under both ¼" and ½" NPT in the parts list (the ‘S’ list shows ½").
Specification: ½" NPT, cad plated; ½" NPT, cadmium plated
Fits these Armstrong pumps
- Series 4380 (vertical in-line) – pump sizes 5 × 5 × 8, 6 × 6 × 10, 6 × 6 × 11½, 8 × 8 × 11½, 5 × 5 × 13, 5 × 5 × 13H, 6 × 6 × 13, 6 × 6 × 13H, 8 × 8 × 13
- Designation: 'M'
- Motor frames: 213JP, 215JP, 254JM, 256JM, 284JP, 286JP
- Drawing item: 105
- Series 4300 (vertical in-line) – pump sizes 5 × 5 × 8, 6 × 6 × 10, 6 × 6 × 11½, 8 × 8 × 11½, 5 × 5 × 13, 5 × 5 × 13H, 6 × 6 × 13, 6 × 6 × 13H, 8 × 8 × 13, 10 × 10 × 13, 8 × 8 × 15, 10 × 10 × 15
- Drawing item: 105
- Series 4600 (horizontal split case) – pump sizes 5 × 4 × 10L, 6 × 5 × 10H, 6 × 5 × 10L, 8 × 6 × 10L, 8 × 6 × 10H, 10 × 8 × 11L, 10 × 8 × 11H, 5 × 4 × 12L, 5 × 4 × 12H, 6 × 5 × 12L, 6 × 5 × 12H, 8 × 6 × 12½L, 8 × 6 × 12½H, 12 × 10 × 12½H, 10 × 8 × 14L, 10 × 8 × 14H, 6 × 5 × 15L, 6 × 5 × 15H, 8 × 6 × 15L, 8 × 6 × 15H, 12 × 10 × 15H, 12 × 8 × 18
- Drawing item: 51
Other parts for this pump
Rebuilding a Series 4380 5 × 5 × 8? These parts are often replaced at the same time:
| Item | Part | Armstrong part no. |
|---|---|---|
| 39 | Water slinger | 406622-000 |
| 40 | Stuffing box / adapter | 426749-011 |
| 40 | Stuffing box / adapter | 426749-031 |
| 43 | Motor washer | 927113-100 |
| 44 | Motor capscrew | 911121-108 |
| 57 | Male connector | 939001-114 |
| 59 | Flush line tubing | 997531-004 |
| 62 | Mechanical seal kit | 975000-982 |
| 62 | Mechanical seal kit | 9975001-813 |
| 62 | Mechanical seal kit | 9975001-613 |
| 62 | Mechanical seal kit | 9975001-817 |
| 62 | Mechanical seal kit | 9975001-818 |
| 70 | Shaft sleeve | 425869-001 |
| 71 | Shaft sleeve spacer | 425868-005 |
| 80 | Impeller | 427131-041 |
| 83 | Impeller washer | 425742-001 |
| 86 | Impeller capscrew | 911900-114 |
| 90 | Case wear ring | 426413-413 |
| 100 | Casing | 427024-011 |
| 100 | Casing | 427025-031 |
| 101 | Casing gasket | 426401-003 |
| 102 | Casing gauge plug | 937105-201 |
| 103 | Casing capscrew washer | 927121-100 |
| 104 | Casing capscrew | 911129-112 |
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.
