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In-stock parts
Order by 2PM MST
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2045 West Buckeye Road
Phoenix AZ 85009
United States
The UnitedBuilt S05126MS volute gasket is a replacement gasket for the case joint on 4x3 M3ZRM and M3ZRMS pumps. It is used with both the rope-packing and mechanical-seal arrangements, but it is separate from either shaft-sealing system.
Choose S05126MS when the repair calls for the volute gasket. The 4x3 designation describes the pump application, not the gasket's physical inside or outside dimensions. This item is the gasket, not a complete reseal kit.
The volute gasket belongs at the joint between the case and the adjoining pump assembly. Identifying that joint helps distinguish it from rope packing or a mechanical shaft seal. If several joints are being serviced, select the additional sealing components for the actual pump construction rather than assuming one gasket covers the complete repair.
| Specification | Detail |
|---|---|
| Part number | S05126MS |
| Component | Volute gasket |
| Pump application size | 4x3 |
| Repair position | Item 73: volute-case joint |
| Selection | Application |
|---|---|
| Rope-packing construction | UnitedBuilt M3ZRM |
| Mechanical-seal construction | UnitedBuilt M3ZRMS |
| Separate sealing components | Rope packing and mechanical shaft seal are not this gasket |
| Check | What to confirm |
|---|---|
| Part and joint | Match S05126MS and the volute-case joint. |
| Gasket shape | Compare the old gasket and mating surfaces; do not use 4x3 as gasket dimensions. |
| Repair scope | Order any required packing, shaft seal, grease cap or water slinger separately. |
Need help selecting the correct replacement part? Contact UnitedBuilt through online chat, email parts@unitedbuilt.com, or call 602-253-7750 with your pump model, existing part number or photos.
| Country of Origin | USA (subject to change) |
|---|---|
| UPC | 850087050104 |
| Weight | 0.02 lb |