
Quick overview
- Genuine Pentair The factory BioShield flow switch, part 523458.
- Connector included The connector switch comes with it, so there is nothing else to source.
- Four listed models Fits Pentair 522635, 522636, 522637 and 522638.
- Monitors flow Watches the flow rate through the system so it only operates when water is actually moving.
- A safety part A flow switch is what stops the unit running dry, which is why a failed one takes the whole system offline.
- Direct replacement Swaps for the original switch on an installed BioShield.
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Product details
The Pentair 523458 is the BioShield flow switch, supplied with its connector. It is the genuine Pentair part, listed for models 522635, 522636, 522637 and 522638.
What it does
A flow switch is a simple safety interlock. It senses whether water is actually moving through the unit and only allows operation when it is. That protects the equipment from running dry and stops it working on stagnant water.
Diagnosing it
A dead flow switch usually shows up as a unit that will not start even though the pump is running and the plumbing is full. Before replacing the switch, confirm that flow really is there, since a clogged filter or a closed valve produces the same symptom for an entirely different reason.
What is included
The switch with its connector, so there is no separate connector to buy alongside it.
| Brand | Pentair |
|---|---|
| Manufacturer part number | 523458 |
| UPC | 788379884505 |
| Type | Flow switch with connector |
| Included | Connector switch included |
| Function | Monitors the flow rate |
| Fits | Pentair 522635, 522636, 522637, 522638 |
| Shipping weight | 2 lb |
| Ships | Parcel |
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