The 34-0217-K flow switch is a replacement flow-sensing safety device used in spa and hot tub plumbing systems. It detects water flow and ensures that critical components like the heater only energize when proper circulation is present, helping protect your equipment from dry-fire conditions and overheating.

Specifications:

• Brand: Hydro-Quip
• Reliable flow detection accurately senses water movement in the spa's circulation system, enabling the control system to permit heater operation only when sufficient flow exists
• 1.25" male pipe thread (MPT) — standard plumbing thread size for direct installation into unions, tees, or heater fittings on 1.25" plumbing lines
• Large flow capacity designed for higher-flow systems with larger plumbing
• Robust construction built to withstand continuous exposure to heat, moisture, and chemically treated spa water
• Part no. 34-0217-K

Why choose this product? This flow switch is a key safety component that ensures your spa's heater and other equipment operate only under safe flow conditions. Replacing a faulty switch restores proper flow monitoring, prevents equipment damage, and contributes to reliable, trouble-free spa performance.

Returns & installation: Verify thread size (1.25" MPT) and flow requirements against your existing switch before ordering, as electronic parts are non-returnable once installed. Installation involves shutting off power and water, then threading the new switch into place.

FAQ

Q: What are the signs of a failing flow switch?
A: A spa that won't heat, displays a flow-related error code, or cycles the heater on and off unexpectedly may have a faulty flow switch.

Q: Do I need to shut off power before replacing this part?
A: Yes — always disconnect power at the breaker and drain or isolate the affected plumbing line before installation.