你可先FLUSH THE LINE.

You can flush your line first. If you need to flush your line once a year, you are OK. If you need to flush your line once every month or 15 days, you have to improve it.
你的AUTO FEED LINE 好像接在SUPPLY SIDE. Your pressure regulator's pressure may be too low since send the water to 4th floor. Your AUTO FEED may not work.

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• Okay, this is old picture. I will tell my guy about it. -firefly2000- ♀ (106 bytes) () 02/03/2015 postreply 18:07:07