Ideal Blanking Off Cap 3/4 BSP M/I 000039

The Ideal 000039 is a 3/4 BSP M/I blanking off cap, supplied by Ideal for use on its commercial heating appliances. It screws onto an unused threaded port to close the tapping off, keeping the appliance's water circuit sealed and preventing debris or air from entering an open connection. It is listed under the caps, plugs and sockets group of Ideal Commercial spares and is used across the Concord Super Series range.

• Visible weeping or a damp trail around the blanking cap after the appliance has run
• Corrosion or scale build-up on the cap or the threads it sits on
• The cap missing altogether, leaving an open tapping on the appliance
• Water staining or mineral deposits on the casing below the connection point
• The cap will not tighten down cleanly, suggesting damaged threads

• Check the appliance model and serial plate against the compatibility list to confirm the 3/4 BSP connection is the correct size for your unit
• Confirm the part number on the existing cap or in the appliance documentation matches 000039 or 1170004
• Inspect the mating face for a sealing washer before refitting, as the joint relies on a clean, flat seat
• Isolate and drain the appliance before removing or refitting the cap