Hello All, Planning on installing a bath/shower mixer tap in my bathroom but have some queries first. The bath currently has 2 individual taps (Ideal Standard). Checking under the bath the hot water feed has a Thermostatic Mixing Valve installed. The hot water system is a Combi-Boiler so no header tank. Question is: Can I install a bath/shower mixer tap directly onto the existing bath tap feeds with it having a thermostatic mixing valve? or would it require either a regulator valve and non-return valve to stop cold water getting to the boiler?
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