Biasi Flow Group Kit DHW/CH BIASIBI1011503

The Biasi BI1011503 is a DHW/CH flow group kit manufactured by Biasi. It forms part of the hydraulic circuit on Biasi water heaters, where the flow group directs water between the domestic hot water and central heating sides of the appliance and responds to demand from either service. The assembly sits in the water path and is a serviceable item, so it is replaced as a unit when the internal components wear or the body begins to leak.

• Domestic hot water runs cold or fluctuates while the heating circuit continues to operate.
• The appliance fires for heating when only hot water is drawn, or fails to switch between the two modes.
• Water weeps or drips from the flow group body, its connections or the spindle area.
• Reduced hot water flow rate at the tap compared with previous performance.
• Scale or debris build-up inside the group causing sticking or erratic operation.

• Confirm the part number BI1011503 against the data plate or the manufacturer's literature for your appliance.
• Check the appliance serial number and model details, as Biasi used more than one hydraulic arrangement across its water heater range.
• Inspect the mating faces and connections on removal; a replacement seal or gasket set may be needed to complete the repair.
• Work on the water-carrying components of a gas appliance should be carried out by a competent person, with the appliance isolated and drained first.