Ten wheel truck Auman clutch pump pipe where no gas causes
First, fourth loop damage. Second, the above-mentioned "iron pipe blockage", the general temperature is low, the storage tank has water vapor, it will freeze. The second phenomenon is more common, it is recommended to use hot water to cast 6# iron pipe. I hope my answer will be helpful to you.
Usually the four loop above the 6# rough iron pipe caused by ventilation, common reasons for two.
