All equipment is not created equally. Take this walk in beverage cooler evaporator for example. This particular model is prone to leakage due to low quality copper usually obtained from foreign countries. The friction between the refrigerant moving inside the tubes under pressure will usually push through weak spots in the tubing.
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This customer was wise in having commercial insurance, but insurance companies will generally not cover pin hole leaks such as you see here. Contact us for quality equipment recommendations.