Ideal Water Return Manifold Super 4 100339

The Ideal 100339 is a water return manifold used on Concord Super Series 4 commercial heating appliances. It collects returning water from the system and channels it back into the appliance's heat exchanger circuit, so flow is distributed evenly rather than being concentrated at a single connection point. The manifold is a cast and machined assembly with multiple connection points, and it sits on the hydraulic side of the appliance where it is exposed to system water, heat and any debris carried around the circuit.

• Water weeping or visible staining around the manifold body or its connection joints
• Uneven heat distribution across the appliance, with some sections running noticeably cooler
• Reduced flow through the return side of the circuit, or the appliance cycling on its flow and return sensors
• Sludge, scale or corrosion debris collecting inside the manifold and restricting the waterways
• Cracking, pitting or thread damage found when the manifold is removed for inspection

• Confirm the appliance model and serial number against the compatibility list, as Concord Super Series 4 covers both horizontal and vertical configurations
• Check the existing manifold for the alternative number 1175286 so the correct variant is matched
• Inspect the joint seals and gaskets on removal and replace any that are compressed, hardened or damaged before refitting
• Isolate the appliance and drain the relevant section of the system before starting work