Ideal Pipe Expansion Vessel Kit Prefix Ace Onwards 177600

The Ideal 177600 pipe expansion vessel kit is the pipework assembly that links the expansion vessel to the rest of the heating circuit on a range of Ideal gas boilers. It is supplied by Ideal as a direct replacement for the original pipe run, so the vessel can be reconnected without fabricating new pipework on site. The kit is listed under the Pipes & Hoses spare part category and is used across the Atlantic Combi, Classic 2 and related Ideal appliance families built from the Ace prefix onwards.

• System pressure drops steadily and the boiler needs frequent topping up at the filling loop.
• Water weeping or staining at the pipe union where the vessel connects to the circuit.
• Visible corrosion, pitting or cracking along the pipe run, particularly at bends and joints.
• Pressure rises sharply when the boiler heats up and falls again once it cools, pointing to a vessel that is no longer absorbing expansion.
• Discolouration or scale build-up around the connection, often found during an annual service.

• Check the GC number on the appliance data badge against the compatibility list to confirm the correct variant.
• Confirm the serial number and prefix of the boiler, as this kit covers appliances from the Ace prefix onwards.
• Note the alternative part number 8901840 in case the original number has been re-labelled on older stock.
• Have new sealing washers or O-rings to hand if the existing seals are disturbed during removal.