In the event of fouling of downstream check valve, leakage of CO2 gas would be vented to atmosphere through the vent port thereby safeguarding the potable water system from CO2 gas contamination.

• 万一下游止回阀受到污染，则泄漏的CO2气体将通过排气口排放到大气中，因此保护饮用水系统不会受到CO2气体的污染。