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Hi I was wondering if the order you place ur fixtures on a PEX manifold matters. Wouldn’t the hot water coming in be battling cold water on unprimed side of manifold more or less depending on which fixture you use and where you placed it on the manifold. I’m in the process of building a copper manifold and was wondering about this. I would prefer not to get Luke warm water for a while before the whole manifold is primed.