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答：可以，DG1背後雙面膠紙可貼在牆上，只要整個渠閘蓋着，亦可發揮同樣作用。 如是凹嵌式 3寸x2.5寸(7.5x6 cm) 或 4寸渠閘，可先裝上轉接器111，然後再裝DG1。
答：要檢查一下活渠門和渠閘之間有沒有污物而引致空隙。因為臭味或蟑螂可穿越狹蓬或虛位。亦有可能是活門給污物卡住，清理後便可以。還有要注意 DG1 型號安裝時有沒有貼地，不貼地便會出現空隙而引致臭味傳入。 亦有可能是開了抽氣扇而門窗關上，導致空氣只可從去水渠口位進入，這樣臭味也同時進入。要解决就要讓浴室或廚房門下邊有罅隙，讓空氣可從門底進入。
Question: Why is the Drain Guard not very securely attached to the drain gate?
Answer: Before installation, the drain gate needs to be cleaned thoroughly with sterilizing alcohol. When it is totally dry and free from dirt, then you may stick Drain Guard on the drain gate.
Question: Why is Drain Guard DG2 not necessarily sticked on the drain gate?
Answer: If the user accidentally kicked on DG2, he will kick away it instead of falling down. Normally drain gates are located near the wall corner, so the chance of kicking it is low. If your drain gate is really located at a place that is easily come across, you have to watch out and avoid any accident.
Question: The drain gate at my home is smaller than 3 inch. Can I install DG1?
Answer: Yes, you may. You can stick DG1 on the wall. As long as it is totally covered the drain gate, it will work properly.
Question: I have installed Drain Guard already, why there is still a bit odour found?
Answer: You may check whether there is any dirt between the Drain Guard and the drain gate. If there is any gap found, odour or insect can pass through. If dirt is found on the Drain Guard door(s), same problem will happen. If this is the case, just remove the dirt and Drain Guard will work again.
Question: Why is the door of Drain Guard not hidden?
Answer: There is always dirt such as hair or clothes fiber attached to the door which causes it cannot close well. If it is hidden, we do not know whether it is working or not. Also we cannot clean up the dirt instantly.
Question: Does Drain Guard need any battery?
Answer: No, it does not require any battery or other kinds of energy.
Question: Why there is always a little bit of water left around the Drain Guard?
Answer: The floors of bathrooms and kitchens are usually built at a slightly inclined angle. So dirty water will naturally flow towards the drain gates. Since the floor angle is mild, even though without Drain Guard installed, the last bit of water will stay around the drain gate due to insufficient momentum. So it is a normal phenomenon.
Question: How to clean Drain Guard if it gets dirty?
Answer: Just use water, detergent or sterilizing alcohol. Do not use concentrated cleaning agent or corrosive substance as they may damage the surface finishing and the mechanism of the door(s).
Question: How long can Drain Guard last for?
Answer: If use properly and without any significant damage, normally it can work for 4-6 years.