異徑管采用異徑密排技術的熱水器，不論春夏秋冬四季如何變化，即使在陰、雨、雪的天氣中，也因其率而具有的先熱達到洗浴溫度的特點。偏心異徑管由于一側是平的，利于排氣或者排液，方便開車和檢修，因此水平安裝的液體管道一般用偏心異徑管。同時，節能減排效果為顯著，采用異徑密排技術熱水器整機光熱效率可達73%左右，既節電、節煤，又減少二氧化碳排放量。
         偏心異徑管的管口切點向上的時候，稱為頂平安裝，一般用于泵入口，利于排氣，切點向下成為底平安裝，一般用于調節閥的安裝，利用排凈。同心異徑管有利于流體流動，在變徑的時候對流體流態的干擾較小，因此氣體和垂直流動的液體管道使用同心異徑管變徑。異徑管的圓度不應大于相應端外徑的1%，且允許偏差為±3mm；異徑管尺寸允許偏差應符合表4.2.2-3的規定。
         可以根據自身工藝管道的實際流量對應上表中的流量來選擇相應口徑規格的流量計，盡可能選擇與工藝管道相同口徑規格的流量計。偏心異徑管兩端管口圓周內切，一般用于水平的液體管道。異徑管也叫大小頭，兩端管口直徑不同，用于連接不同直徑的管子或法蘭進行變徑。同心異徑管的兩端管口，圓心在同一軸線上，變徑的時候，以軸線計算管子位置的話，管子的位置不變，一般用于氣體或垂直的液體管道變徑。
Different-diameter pipe diameter by densely technology of water heater, no matter how chun xiaqiu winter seasons, even in the shade, rain, snow, but also because of the high efficiency and good bath temperature reached the first thermal characteristic. Eccentric different-diameter pipe due to one side is flat, drainage, convenient exhaust or drive and maintenance, so the general level of liquid pipe installation with eccentric different-diameter pipe. At the same time, the effect is more remarkable energy saving and emission reduction, and adopts different-diameter densely machine applies light-heat efficiency technology water heater, saving both reaches 73%, coal, and reduce carbon dioxide emissions.
Eccentric different-diameter pipe of the tangent, called up top flat installation, commonly used for pump suction, exhaust, for its downward becomes the commonly used for installation and adjustment of the installation, use valves. Concentric different-diameter pipe for fluid flow in size of fluid flow pattern of small, so the interference and vertical flow of liquid gas pipeline using concentric different-diameter pipe diameter changes. Different-diameter pipe of roundness should not exceed 1% of the corresponding diameter, and the allowable deviation of ± 3mm, Different-diameter pipe size deviation should be allowed to meet the prescribed 4.2.2 table 3 -.
According to their actual flow process piping to select the corresponding to the traffic flow, the corresponding diameter specifications as selection and piping specifications of the same diameter meter. Eccentric different-diameter pipe tube ends in circumference, commonly used for liquid level of pipeline. Different-diameter pipe size head, also called tube diameter at different, used to connect different diameter of pipe or flange diameter changes on. Concentric different-diameter pipe ends of the pipe axis, circle, at the same time, with the size and location of pipe axis calculation, the position of commonly used for gas or liquid pipe size of vertical.