Dispenser mixing module and method of assembling and using same

A dispenser module (100) including: a housing (102); a receiving chamber fluid (112) disposed within said housing and having a rod passage (156) formed in the receiving chamber fluid and at least one orifice (182, 184) communicating fluid flow with said He passed; a rod (118) received in said rod passage (156); wherein said chamber receiving fluid (112) is formed by a block of cold flow of material with a hole formed therein to define said rod passage, and compression means (116) for imposing compressive forces on said reception chamber fluid, characterized in that said dispenser module includes locking means (158) to prevent, in conjunction with an adjustment of the position of said rod (118), adjusting the receiving chamber fluid in a direction against a thrust direction of said compression means (116) despite a relationship bond formed between said rod (118) and the receiving chamber fluid (112) is sufficient to move the compression means were it not for said means blocking.