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Discuss Need for Mixing Valve out outlet from the DHW tank in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Hi all,
the heating system in a bungalow that uses an Air to Water heat pump has a TMV (thermostatic mixing valve) at the outlet from the DHW tank. It is a gravity system. While the shower is pumped and there is no bath, the TMV is likely to impact on the flow to the WHB and Kitchen sink.

Can the TMV at the outlet from the DHW tank be left out?

Looking at Irish Building regulations, there does seem to be a requirement to fit a TMV. In UK Regs Sanitation, hot water safety and water efficiency Part G, a bath needs a TMV and CIBSE reference the need for TMVs in NHS/care type buildings,

Perhaps TMVs are not needed in Irish Houses?
 

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