Wacker Neuson 1000338833 Reflux Line

The Wacker Neuson Reflux Line is a genuine OEM component designed for the TH627 hydronic surface heater. Sourced directly from Wacker Neuson, this part matches the original specification installed at the factory, ensuring a straight-forward, like-for-like replacement. If your TH627 is showing signs of fluid return issues or coolant circulation problems, replacing the reflux line with the correct OEM part restores proper system operation quickly and confidently.

Key Features

• Genuine OEM Construction — Manufactured to Wacker Neuson's original material and dimensional spec, so the line holds up under the thermal cycling demands of a hydronic heating system.
• Direct-Fit Replacement — Engineered to connect to the existing ports and fittings on the TH627 without reworking or adapting any surrounding components.
• Confirmed TH627 Fitment — Verified against Wacker Neuson spare parts list 418-02 for the TH627 hydronic surface heater series.
• Restored Coolant Return Flow — A functioning reflux line maintains proper fluid circulation through the heating circuit; a cracked or blocked line can cause uneven surface heating and system strain.
• Fluid System Integrity — Using the correct OEM line material helps prevent leaks at connection points, keeping the closed-loop heating circuit sealed and operating at the intended pressure range.

The reflux line is part of the fluid return circuit in a hydronic surface heater, carrying heated coolant back through the system after it has transferred heat to the surface or zone being conditioned. It plays a critical role in maintaining continuous, balanced flow through the heating loop — without it, circulation becomes disrupted, leading to hot spots, reduced heating output, or damage to the pump and heat exchanger. A worn, cracked, or leaking reflux line should be replaced promptly to keep the TH627 operating at full efficiency.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

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Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.