Pentair IntelliChlor Flow Switch Assembly | 520736
Pentair
SKU: 520736
Pentair IntelliChlor Flow-Temperature Switch Replacement Kit (Flow + Water Temp), 1/2" MPT | 520736
The Pentair 520736 is an OEM flow-temperature switch replacement kit for select Pentair IntelliChlor salt chlorine generator systems. This sensor confirms water flow through the cell and also provides water temperature feedback, helping prevent chlorine generation when flow is insufficient and supporting accurate system operation.
Key Features
- Flow + temperature in one assembly: verifies circulation and reports water temperature to the system.
- Safety protection: helps prevent the salt system from generating chlorine under low/no-flow conditions.
- Threaded installation: 1/2" male pipe thread (MPT) for the IntelliChlor cell flow switch port.
- OEM Pentair replacement kit: restores proper sensing without replacing the entire cell.
- Includes watertight splice connectors: designed for sealed, weather-resistant wire splicing.
Compatibility
- Fits: Pentair IntelliChlor salt systems including IC15, IC20, IC40, IC60 (where 520736 is specified)
- Tip: Confirm your cell model and parts diagram. IntelliChlor and iChlor use different flow/temperature switch kits.
What’s Included
- (1) Flow-temperature switch assembly
- (4) Watertight splice connectors
Common Symptoms of a Failed Flow/Temp Switch
- Persistent low/no flow or check flow indications even with the pump running
- System output stops or becomes intermittent due to unstable flow sensing
- Inaccurate water temperature readings affecting operation
- Visible damage, cracking, or water intrusion at the switch body/cable
Installation Notes
- Turn off power to the pump and salt system before servicing.
- Relieve pressure and drain down as needed before removing the existing switch.
- Use the included watertight splice connectors for a sealed electrical connection.
- Thread the new switch in carefully and do not over-tighten.
- After installation, restore flow and confirm the system recognizes flow and shows stable temperature.
- If flow errors persist, verify overall circulation (clean baskets/filter, open valves, adequate pump speed) and confirm the switch orientation/location matches the cell’s flow direction.
Specifications
- Brand: Pentair
- Part Number: 520736
- Part Type: Flow-temperature switch replacement kit
- Thread: 1/2" MPT
- Function: Flow verification + water temperature sensing
- Quantity: 1 kit
Related Products
- Search Aqua Pool Supply for 520736
- Pentair IntelliChlor replacement parts
- IntelliChlor cell O-rings & seals
- Salt cell cleaner
- Watertight wire connectors
- Flow switches
Maintenance Tips
- Most “flow” issues are caused by low circulation—keep pump baskets and the filter clean and verify valves are fully open.
- Maintain balanced water chemistry to reduce scale that can restrict flow through the cell and affect sensor accuracy.
- Inspect wiring and splices seasonally for corrosion or water intrusion, especially in outdoor equipment areas.
- For variable-speed pumps, confirm your salt system run speed meets the minimum flow required for chlorine generation.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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