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Slide the expansion vessel and insulation out of the retaining clips. 7. Reassemble in reverse order using new sealing washers. Fully recommission the appliance and system. 12.17 Condensate Trap (Fig. 63) 1. Disconnect the two sensing wires from the trap connections. 2. Squeeze together the wire spring clip to release and ease the inlet pipe from the trap spigot. 3. Undo the nut securing the condensate drain pipe to the trap. Disconnect the pipe and sealing washer. 4. From underneath the boiler