Potterton Filling Tap 1/2 Inch M-M Blue 5138676

The Potterton filling tap is a 1/2 inch male-to-male valve used to fill and top up the system water circuit on Potterton Commercial boilers. It is finished in blue and carries the manufacturer part number 5138676. The tap provides manual control of the water supply into the boiler's primary or heating circuit during commissioning and servicing.

• Water weeping or dripping from the tap body or spindle
• The handle turns freely without shutting off or regulating the flow
• The tap body or connections show corrosion, limescale build-up or cracking
• The system will not hold pressure and continues to lose water at the fill point
• Visible damage or a rounded, seized spindle that cannot be operated by hand

• Confirm the connection size and thread type match the fill point on your appliance
• Check the fitting orientation and whether a straight male-to-male tap is the correct pattern
• Verify the part number 5138676 against the appliance's documentation or existing component
• Isolate the water supply and depressurise the system before removal