How to change out a Bottoms Up brass block

Earlier models of the dispenser include a plated brass block. Over time, the plating could wear down and begin to flake off. Most of these dispensers and blocks have been replaced, but in the rare instance you're noticing this, give us a call at 888-618-0486.

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Could this be used for fountain drinks, slushy’s, milkshakes or smoothies? Also could I use copper pipes rather than plastic?