Household water pipes are pipes used for household water supply. They are generally installed concealed in the wall. Currently, household water pipes are generally divided into three categories: the first is plastic-coated metal pipes, such as plastic-coated steel pipes and aluminum-plastic composite pipes. The second is plastic pipes, such as polypropylene (PB) and polypropylene (PP-R). The third is metal pipes, such as hot-dip galvanized cast iron pipes lined with plastic, copper pipes, and stainless steel pipes.
Which type of household water pipe is best?
Currently, common household water pipes include PPR hot-melt pipes, aluminum-plastic composite pipes, and steel-plastic composite pipes. Galvanized steel pipes are rarely used anymore.
PPR water pipes: If you use a mix of hot and cold water, use hot-water pipes. The thickening of PPR hot-water pipes ensures stability and is less susceptible to damage during future heat and cold transfer. The biggest advantage of PPR pipes is that they are heat-fused to fittings, forming a single unit. These pipes can be buried directly underground or in walls, minimizing future risks. Other pipes, such as aluminum-plastic pipes, are generally of good quality.
Aluminum-plastic pipes: If they are genuinely qualified, their quality should be considered good. However, domestic materials and corresponding connectors can present some issues. For example, cracks may form during bending or leaks may occur at the joints, which are some of the reasons why aluminum-plastic pipes are being phased out.
Aluminum-plastic composite pipes: Aluminum-plastic pipes are relatively reliable in terms of their inherent reliability. PPR pipes have unique melting properties, ensuring the stability of their connections. The newly introduced PPR aluminum-plastic composite pipes combine the advantages of both. The outer layer of the pipe is made of polypropylene (PPR), which allows for direct connection to pipes. The middle layer is an aluminum layer, which is inherently more pressure-resistant. The inner layer is made of heat-resistant polyethylene, which is superior to PPR pipe. Therefore, the combination of these two materials effectively combines the advantages of both aluminum-plastic and PPR pipes.
As for which is better, consumers can choose the pipe that best suits their needs.
Household Water Pipe Specifications:
Common household water pipe specifications include: DN15 (4-inch pipe), DN20 (6-inch pipe), DN25 (1-inch pipe), DN32 (1-inch 2-inch pipe), DN40 (1.5-inch pipe), DN50 (2-inch pipe), DN65 (2.5-inch pipe), DN80 (3-inch pipe), DN100 (4-inch pipe), DN125 (5-inch pipe), DN150 (6-inch pipe), DN200 (8-inch pipe), and DN250 (10-inch pipe).
A water pipe measuring Φ25 x 1/2 has an outer diameter of 25 mm. The actual nominal diameter is DN20 (commonly known as a 6-inch pipe). You can buy a 6-inch faucet or a 4-inch faucet (just add a reducer between the pipe and the faucet).
Household faucets come in a wide variety of styles and materials, but the threaded connection to the pipe is typically sized according to 4-inch, 6-inch, or 1-inch diameters. Don't worry about buying the wrong one.
Usually, 4 inches pipe is measured in inches. Therefore, a 4-inch pipe is 1/2 inch (4/8 = 1/2). Since one inch equals 25.4 mm, the inside diameter of a 4-inch pipe is 25.4/2 = 12.7 mm, which is commonly referred to as the inside diameter of a DN15 water pipe.
4 inches is the length of the diameter of an imperial pipe, meaning 1/2 inch equals 15 mm in metric.
One inch equals 8 inches, which equals 25.4 mm in metric.
6-inch = 3/4 inch = 20 mm.
4-inch = 1/2 inch = 15 mm.
Also, remember that pipes are measured by inside diameter, but pipe threads are measured by pitch diameter, expressed as DN. Threads are divided into metric M and imperial G. Pipe threads are generally in imperial, with a thread angle of 55 degrees, compared to 60 degrees in metric.
Which type of water pipe is suitable for home renovations?
Aluminum-plastic pipes are relatively reliable, purely from a pipe-by-pipe perspective. PPR pipes have a unique melting advantage, ensuring stable joints. Deng Quan, however, cited a new type of pipe on the market-home luxury pipes-as combining the advantages of both. The outer layer of the pipe is made of polypropylene (PPR), allowing for direct connection to pipes. The middle layer is an aluminum layer, which inherently offers significantly greater pressure resistance. The inner layer is made of heat-resistant polyethylene, which is superior to PPR pipe. Therefore, the combination of these two materials effectively combines the advantages of both aluminum-plastic and PPR pipes.