The bottom of the risers is provided with a cleaning drain outlet which can be opened for washing the risers one by one by adding a cleaning agent after a period of use.
在上行管的底部设一清洗排污出口，用过一段时间加入清洗剂，打开 下排污口进行冲洗，一根根清洗。
This positions the relief valve below the first check valve, enabling the zone to drain through the relief valve outlet.
在这种位置，安全阀位于第一止回阀下面，使得这个区能够通过安全阀出口排放。
A proper drain line connected to the valve outlet and run to a safe place of disposal must be installed.
必须安装一个适当的排泄管道，连接阀门的出水口，并且流向安全的地方。
Dual fireproof oil reservoirs should be designed, and the oil inlet height should not be lower than that of the water outlet to siphon oil in and drain water off.
防火油池应进行双池设计，两池中进油口和出水口不应同高或进口低于出口，这样才能形成虹吸排水贮油现象；
The drain pipe must be the same size as the valve outlet, and must pitch downward from the valve.
排泄管与安全阀出口必须有相同的通径，必须从安全阀开始垂直向下。
A time-delay drain valve is arranged on the reclaimed water outlet pipe, and the reclaimed water outlet pipe is communicated with the water inlet of a closestool.
中水出水管上设有延时放水阀，中水 出水管与马桶进水口连通。
A time-delay drain valve is arranged on the reclaimed water outlet pipe, and the reclaimed water outlet pipe is communicated with the water inlet of a closestool.
中水出水管上设有延时放水阀，中水 出水管与马桶进水口连通。
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