Ariston Unvented Water Heater Kit A 2 litre Expansion Vessel + Non-Return Valve
The Ariston Unvented water heater kit
Current Water Regulations and Bylaws permit unvented water heaters, with a capacity up to 15litres, to accommodate the expansion of water, that occurs during the heating cycle, in the system pipe work. To achieve this the pipe work between the nearest cold water draw off and the water heater must be of sufficient volume to accommodate the expansion.
As a guide 10litre capacity requires 2.8m of 15mm pipe or 1.5m of 22mm pipe or an expansion vessel.
If it is not possible to accommodate the expansion in the system pipe work,then it is necessary to to use an expansion vessel and non-return valve KIT A
Call our sales team on 01543 509444 for more information, help and advice.