Ideal Filling Loop Fitting HIU 178087

The Ideal 178087 is a filling loop fitting for a heat interface unit (HIU). It is produced under the Caradon name for Ideal and forms part of the filling loop assembly used to introduce water into the unit's circuit during commissioning and top-up. The fitting is supplied as a replacement component for Ideal Commercial appliances.

• Water weeping or dripping from the filling loop connection
• System pressure dropping after the loop has been used to top up
• Visible scale, corrosion or cracking around the fitting body
• Difficulty achieving a watertight seal when the filling loop is connected
• The loop fails to hold pressure while the unit is being filled

• Confirm the appliance model and serial number against the compatibility list.
• Check the part number on the existing component; the alternative number 1783173 may also be marked on it.
• Inspect the washers and seals on the filling loop and replace them if they are worn or perished.