DN is the nominal diameter of pipes, valves and other pipe fittings, usually close to the inner diameter. It is a standard term established for engineering installation and matching. DN 15 is a 4-minute pipe diameter, DN20 is a 6-minute pipe diameter, DN25 is a 1 inch pipe diameter, DN40 is a 1.5 inch pipe diameter, and DN50 corresponds to a 2-inch pipe diameter.

The difference between 4 being in charge and 6 being in charge.

The diameter of 4 branches is different from that of 6 branches. The diameter of branch pipe is very small, generally 20 mm, and the diameter of 6 branch pipes is relatively large, generally 50 mm.

And four charges and six charges are used in different places. If there is a washbasin and washing machine on the balcony, the water inlet pipe can be used in two ways, one is connected to the bathroom and the other is connected to the balcony. At this time, the water consumption is relatively large, and 6 charges are needed. In the case of kitchen use, you need to use 4 branches. Because there is only one road in the kitchen, the demand for water will not be so great, so it will be more appropriate to use four branches.