Redring optional cold water pack for a Redring EW or MW unvented water heater. Required for operating water pressures between 6 to 12 bar maximum. Ideal for Unvented water storage heaters. Features: Type: Optional cold water pack Application: Unvented water storage heaters If you just need some help, would like to take advantage of our Price Promise or perhaps have a large order to place. Give our team of professionals a call on 0203 994 5470, drop us an email at [email protected] or use our Contact Form.