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Discuss unvented water heater in the Plumbing Jobs | The Job-board area at PlumbersForums.net
If the unit holds less than 15 ltrs then its not classed as an unvented unit so there is the stringent safety controls as temperature pressure relief valve, though it will have safety electrical cut outs. More than likely it may be able to expand to waste if its under 15 ltrs hence the reason its on the cold feed. I have never been involved with zip but im sure its a part of Heatrae Sadia.
TTB
If the unit holds less than 15 ltrs then its not classed as an unvented unit so there is the stringent safety controls as temperature pressure relief valve, though it will have safety electrical cut outs. More than likely it may be able to expand to waste if its under 15 ltrs hence the reason its on the cold feed. I have never been involved with zip but im sure its a part of Heatrae Sadia.
TTB
Sorry ttb but beg to differ! Under 15 litres was not classed as coming under building regs but is still unvented and was under impression still 'must have' temperature relief valve fitted to vessel, not pipework even if under 15l. Doesn't matter unless it has an open vent of some kind. All unvented must have stat @ 60, cut-out @ 85 & temp relief valve @ 90. New building regs include all unvented heaters, even under 15 litres although do not have to notify bldg regs dept.If the unit holds less than 15 ltrs then its not classed as an unvented unit so there is the stringent safety controls as temperature pressure relief valve, though it will have safety electrical cut outs. More than likely it may be able to expand to waste if its under 15 ltrs hence the reason its on the cold feed. I have never been involved with zip but im sure its a part of Heatrae Sadia.
TTB
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