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Run the first part of the hot water distribution pipe work in 22mm. This can be reduced to 15mm and 10mm as appropriate for the type of tap etc. Your aim should be to reduce the volume of the hot draw-off pipe work to a practical minimum so that the time taken for the hot water is as quick as possible. Do not use mixer tap or showers if the balanced cold connection is not provided. Outlets of this type can back pressurize the unit and result in discharge.
Select a suitable position for the expansion vessel. Mount it to the wall using the bracket provided and connect to the inlet control set with the flexible hose provided. Ensure that the top of the vessel is accessible for servicing. If there are to be showers, bidets or taps in the installation then a balanced cold supply is necessary. There is a 22mm balanced connection on the inlet control set.
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