• Main Combi 24
• Main Combi 24 HE
• Main Combi 30 HE

Main Tap Isolation Return 248225 is fitted underneath the boiler, and it allows the user to control the flow of water in to the central heating system. This also allows you to stop the flow completely in case of a leak or emergency. Some engineers refer to this vale as Main Boiler  isolation valve, Main central heating valve, Main Eco heating tap, Boiler flow and return valve. Main Tap Isolation Return 248225 is a Genuine Baxi Spare Part.