Description
The Pentair Impeller Lock Screw (355389Z) is the OEM replacement locking screw for the impeller assembly in Pentair’s Challenger, SuperFlo, and SuperMax inground pump families.
The impeller lock screw secures the impeller to the motor shaft, preventing it from loosening under the rotational forces generated during pump operation. A missing or damaged screw allows the impeller to shift on the shaft, resulting in reduced flow, vibration, and accelerated wear to both the impeller and shaft seal. This is a single screw per unit.
Specifications
| Pentair Part Number | 355389Z |
| Part Type | Screw, Impeller Locking |
| Quantity Included | 1 (Each) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | Challenger High Pressure Pump | CHALLENGER / CHALLENGER HIGH PRESSURE PUMP | Impeller locking screw |
| Pentair | Challenger High Flow Pump | CF-N1-3/4F | |
| Pentair | Challenger High Flow Pump | CF-N1-3/4FE | |
| Pentair | Challenger High Flow Pump | CF-N1-1-1/2FE | |
| Pentair | Challenger High Flow Pump | CF-N1-2FE | |
| Pentair | Challenger High Flow Pump | CF-N2-1F | |
| Pentair | Challenger High Flow Pump | CFII-N1-5FE | |
| Pentair | SuperFlo VS Variable Speed Pump SuperFlo VS/VST Series | SUPERFLO VS / SUPERFLO VS/VST / SUPERFLO-VS-VST | Impeller screw |
| Pentair | SuperFlo VST Variable Speed Pump SuperFlo VS/VST Series | SUPERFLO VST | |
| Pentair | SuperFlo Single Speed Motor SuperFlo Series | 354803S | SuperFlo Pump impeller locking screw 3/4 HP |
| Pentair | SuperFlo Single Speed Motor SuperFlo Series | 354821S | SuperFlo Pump impeller locking screw 1 HP |
| Pentair | SuperFlo Single Speed Motor SuperFlo Series | 354823S | SuperFlo Pump impeller locking screw 1-1/2 HP |
| Pentair | SuperFlo Single Speed Motor SuperFlo Series | 354815S | SuperFlo Pump impeller locking screw 2 HP |
| Pentair | SuperMax VS Variable Speed Pump SuperMax Series | SUPERMAX VS / SUPERMAX-VS | Impeller screw |
| Pentair | SuperMax SuperMax Series | 348191 | Screw, Impeller Locking |
| Pentair | SuperMax Motor SuperMax Series | 354804S | SuperMax Pump part 3/4 HP. Verify fitment before ordering. |
| Pentair | SuperMax Motor SuperMax Series | 354822S | SuperMax Pump part 1 HP. Verify fitment before ordering. |
| Pentair | SuperMax Motor SuperMax Series | 354824S | SuperMax Pump part 1-1/2 HP. Verify fitment before ordering. |
| Pentair | SuperMax Motor SuperMax Series | 354816S | SuperMax Pump part 2 HP. Verify fitment before ordering. |
| Pentair | SuperMax Motor SQFL SuperMax Series | 355021S | SuperMax Pump part 1 HP SQFL. Verify fitment before ordering. |
| Pentair | SuperMax Motor SQFL SuperMax Series | 355023S | SuperMax Pump part 1-1/2 HP SQFL. Verify fitment before ordering. |
| Pentair | SuperMax Motor SQFL SuperMax Series | 355027S | SuperMax Pump part 2-1/2 HP SQFL. Verify fitment before ordering. |
| Pentair | Efficient SuperMax Motor SQFL SuperMax Series | 355011S | SuperMax Pump part 1-1/2 HP SQFL. Verify fitment before ordering. |
| Pentair | Efficient SuperMax Motor SQFL SuperMax Series | 355013S | SuperMax Pump part 2 HP SQFL. Verify fitment 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.
