Pentair Lockwasher, 3/8 in. | Dyna-Pro / IntelliFlo XF / WhisperFloXF | U43-12SSZ
- In stock, ready to ship
- SKU:
- U43-12SSZ
-
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About This Item
The Pentair Lockwasher, 3/8 in. (U43-12SSZ) is the OEM replacement stainless steel lockwasher for the Dyna-Pro, Dyna-Pro E, IntelliFlo XF, WhisperFloXF, Max-E-Pro XF, and CSPH/CCSPH Series pumps. This part is specified for 3-phase motor configurations only.
⚠️ IMPORTANT: 3-PHASE MOTORS ONLY
This lockwasher is specified for 3-phase motor configurations only. It is not the correct part for single-phase pump motors. Confirm your pump's motor phase before ordering.
⚠️ IMPORTANT: QUANTITY VARIES BY MODEL
Most Dyna-Pro, WhisperFloXF (single speed), Max-E-Pro XF, and CSPH/CCSPH models require 1 lockwasher per pump. IntelliFlo XF VSF, IntelliFlo XF VS, WhisperFloXF VS, and Max-E-ProXF VS variable speed models require 10 per pump. Check the Notes column in the Fits Into table below and confirm against your equipment's parts diagram before ordering.
This lockwasher seats against the motor mounting hardware to maintain fastener tension and prevent loosening under vibration during pump operation. A missing or deformed lockwasher can allow motor mounting fasteners to back out over time, leading to misalignment and accelerated wear. Replace it any time motor hardware is disturbed during service.
Specifications
| Pentair Part Number | U43-12SSZ |
| Part Name | Lockwasher, 3/8 in. |
| Material | Stainless Steel |
| Size | 3/8 in. |
| Application | 3-Phase motor configurations only |
| Quantity Included | Each (1) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | WhisperFloXF Pump | WHISPERFLOXF | Qty. 1 per pump |
| Pentair | IntelliFlo VSF Pump — IntelliFlo XF Series | INTELLIFLOXF VSF | Qty. 10 per pump |
| Pentair | IntelliFlo VS Pump — IntelliFlo XF Series | INTELLIFLOXF VS | Qty. 10 per pump |
| Pentair | MAX-E-PRO XF Pump — MAX-E-PRO XF Series | MAX-E-PRO XF | Qty. 1 per pump |
| Pentair | WhisperFloXF VS Pump — WhisperFloXF Series | WhisperFloXF VS | Qty. 10 per pump |
| Pentair | Max-E-ProXF VS Pump — Max-E-ProXF Series | Max-E-ProXF VS | Qty. 10 per pump |
| Pentair | CSPH/CCSPH Series Pump | CSPHK-1421 | 3-Phase only. Qty. 1 per pump. |
| Pentair | CSPH/CCSPH Series Pump | CCSPHK-1421 | 3-Phase only. Qty. 1 per pump. |
| Pentair | CSPH/CCSPH Series Pump | CSPHK3-1422 | 3-Phase only. Qty. 1 per pump. |
| Pentair | CSPH/CCSPH Series Pump | CCSPHK3-1422 | 3-Phase only. Qty. 1 per pump. |
| Pentair | CSPH/CCSPH Series Pump | CSPHL-143 | 3-Phase only. Qty. 1 per pump. |
| Pentair | CSPH/CCSPH Series Pump | CCSPHL-143M | 3-Phase only. Qty. 1 per pump. |
| Pentair | Dyna-Pro Inground Pump — Dyna-Pro / Dyna-Pro E Series | MPEA6D-204L | Dyna-Pro / Dyna-Pro E 1/2 through 2-1/2 HP models. Qty. 1 per pump. |
| Pentair | Dyna-Pro Inground Pump — Dyna-Pro / Dyna-Pro E Series | MPE6C-204L | Dyna-Pro / Dyna-Pro E 1/2 through 2-1/2 HP models. Qty. 1 per pump. |
| Pentair | Dyna-Pro Inground Pump — Dyna-Pro / Dyna-Pro E Series | MPRA6D-204L | Dyna-Pro / Dyna-Pro E 1/2 through 2-1/2 HP models. Qty. 1 per pump. |
| Pentair | Dyna-Pro Inground Pump — Dyna-Pro / Dyna-Pro E Series | MPEA6E-205L | Dyna-Pro / Dyna-Pro E 1/2 through 2-1/2 HP models. Qty. 1 per pump. |
| Pentair | Dyna-Pro Inground Pump — Dyna-Pro / Dyna-Pro E Series | MPE6D-205L | Dyna-Pro / Dyna-Pro E 1/2 through 2-1/2 HP models. Qty. 1 per pump. |
| Pentair | Dyna-Pro Inground Pump — Dyna-Pro / Dyna-Pro E Series | MPRA6E-205L | Dyna-Pro / Dyna-Pro E 1/2 through 2-1/2 HP models. Qty. 1 per pump. |
| Pentair | Dyna-Pro Inground Pump — Dyna-Pro / Dyna-Pro E Series | MPRA6E-147L | Dyna-Pro / Dyna-Pro E 1/2 through 2-1/2 HP models. Qty. 1 per pump. |
| Pentair | Dyna-Pro Inground Pump — Dyna-Pro / Dyna-Pro E Series | MPRA6E-147LC | Dyna-Pro / Dyna-Pro E 1/2 through 2-1/2 HP models. Qty. 1 per pump. |
| ...and additional compatible models. Verify your model number with your equipment manual before ordering. | |||
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.
Pro Tip
When servicing motor mounting hardware on any of these pump models, inspect all fasteners and their associated hardware — including lockwashers — for corrosion or deformation before reassembly. A lockwasher that has been fully compressed flat no longer provides clamping tension and should be replaced. Confirm the part number listed in your pump's exploded parts diagram matches U43-12SSZ before ordering, and verify your motor is a 3-phase configuration — this lockwasher is not specified for single-phase motors.
