Automatic Cylinder Cocks

Automatic Cylinder Cocks

by Steve Adler, Vancouver Island Model Engineers

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These cylinder cocks cost practically nothing and can be easily made in an evening. They vent condensate and snap shut on stream. Additionally, they become snifting valves when drifting. Water moves slowly in these cocks and steam more quickly. The stainless steel ball is pushed against the lower "A" outlet. After fabrication, take a mouthful of water and blow into the upper "A" inlet. The water will exit and the following air will snap the cylinder cocks shut. Dimensions are not critical.