Mohan Plumbing Services Provides one of the best Wall Mixer service in Noida. Wall mixer is a single unit fitted on wall that has hot and cold water knob and a common spout attached together. There are basically two types of wall mixers- 2 in 1 wall mixer and 3 in 1. 2 in 1 wall mixer comprises on 2 features i.e. an overhead shower and an attached unit of spout and hot and cold water knob.