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i know there are other makes, but want to know if i can use them as i have been told i need to replace it with the exact one i take out, is this true or will any simular type do as it seems the one i have us the dearest one to replace

Danfoss HS3 3 Port Motorised Valve is faulty central heating comes on with hot water, can i replace this with a different make or does it have to be replaced with the same model