Sundance®/Jacuzzi® Flow Switch 3/4" with Cable (2001–2016) – part # 2560‑040
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Key Features & Benefits
Genuine OEM Safety Part
Prevents heater operation without adequate water flow
Broad Compatibility
Engineered for seamless compatibility with original mounting points for secure placement.Fits Sundance® and Jacuzzi® spas, 2001-2016
Complete Kit
Includes 3/4" slip Tee, switch, and attached 2-pin cable (~18")
Common Cross-Reference
Equivalent to Tecmark TFS303 (3040-303) and Sundance 6560-860
2-Speed System Compatible
Also used when replacing ozone-loop flow switches
Inline Installation
Mounts between heater and plumbing line
Product Overview
The Sundance®/Jacuzzi® 3/4″ Flow Switch with Cable (part #2560‑040) is a critical OEM safety component for spa models built between 2001 and 2016. It activates only when adequate water flow is detected through the plumbing, which is what allows the heater to run—without that signal, the heater stays off rather than risking a dry‑fire burnout.
The kit includes a ¾″ slip Tee, the switch itself, and an attached 2‑pin cable roughly 18 inches long, so it's ready to wire directly into your spa's control system once installed. It's compatible with the widely used Tecmark TFS303 (also known as 3040‑303) and cross‑references to Sundance part #6560‑860, making it a straightforward swap whether your existing switch carries either of those numbers. It's commonly used with 2‑speed circulation systems or when replacing an ozone‑loop flow switch.
Installation mounts the switch inline between the heater and the plumbing line using the included slip Tee, with the 2‑pin cable connecting to your spa's control board. If your heater won't fire and the plumbing itself is clear, a worn or failed flow switch like this one is one of the most common causes.
Frequently Asked Questions
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It detects water flow and only allows the heater to run when adequate flow is present, preventing dry-fire burnout.
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Tecmark TFS303 (also 3040-303) and Sundance part #6560-860.
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A 3/4" slip Tee, the switch itself, and an attached 2-pin cable approximately 18 inches long.
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It's commonly used with 2-speed circulation systems or when replacing an ozone-loop flow switch.