
Pentair Genuine OEM Replacement UOC Motherboard, 4 Aux, EasyTouch, 520659
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Quick overview
- Genuine Pentair factory part 520659, the board EasyTouch ships with.
- Four auxiliary circuits the 4 aux board, for EasyTouch 4 systems.
- The brain of the panel the UOC motherboard runs the relays, sensors and control logic in the EasyTouch load center.
- Pool and spa systems fits EasyTouch pool and spa combination controls.
- Direct replacement restores a panel with a failed or lightning damaged board without replacing the whole load center.
- Match the aux count check that your existing board is the 4 aux version before ordering.
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Frequently bought together

Genuine OEM Replacement UOC Motherboard, 4 Aux, EasyTouch, 520659
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Product details
The Pentair 520659 is the genuine UOC motherboard with four auxiliary circuits for EasyTouch pool and spa automation systems. It is the main board in the load center, the part that drives the relays, reads the sensors and runs every schedule and control function.
When it is the fix
A board that has taken a lightning surge or stopped responding takes the whole system down with it. Replacing the motherboard restores the panel without replacing the load center, relays or transformer, all of which carry over.
Before you order
This is the 4 aux board. Confirm your EasyTouch panel is the four auxiliary version; eight aux systems use a different motherboard.
| Brand | Pentair |
|---|---|
| Manufacturer part number | 520659 |
| UPC | 788379723842 |
| Type | UOC motherboard |
| Auxiliary circuits | 4 |
| Fits | Pentair EasyTouch pool and spa control systems |
| Shipping weight | 0.75 lb |
| Ships | Parcel |
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Questions and answers
What people ask about this product, answered by our pool techs.
Which EasyTouch systems does this board fit?
What does the UOC motherboard do?
Does it include the relays or the transformer?
Is this a genuine Pentair part?
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