How to choose hot and cold water with PPR pipe for home improvement _ Guide to the selection of domestic hot and cold pipes

2026-08-06

First, distinguish: the difference between the foundation of PPR hot and cold water pipes

AD PPR home improvement pipes distinguish between hot and cold water pipes, which can be distinguished by three dimensions: pipe body identification, wall thickness, and pressure level. The distinction method is simple and intuitive, and it is also the basic basis for home improvement material selection.

The cold water pipe body is mainly marked with blue lines, suitable for room temperature tap water transportation, commonly used S5 and S4 series pressure grades, suitable for conventional room temperature and low pressure water supply scenarios, and the pipe wall thickness is relatively thin to meet the daily cold water supply needs.

The hot water pipe body is mainly marked with red lines, suitable for water heaters, wall-mounted boilers, and whole-house hot water pipes. S3.2 and S2.5 series pressure grades are commonly used. The pipe wall thickness is thicker, and the high temperature and high pressure resistance are better. It can withstand the temperature and pressure changes caused by hot water circulation for a long time, and is suitable for long-term use of home improvement hot water pipes.

Common sense of material selection in the industry: hot water pipes can be used instead of cold water pipes, but cold water pipes are not recommended for hot water pipes, which are prone to failure due to insufficient high temperature and pressure resistance.

Second, according to the pressure level selection, adapt to different home decoration scenarios

The water pressure and usage scenarios of home improvement are different, and the pressure grades of suitable pipes are also different. Combined with the standard specifications of AD PPR pipes, the adaptation selection plan is as follows, which fits the local residential water supply environment in Hubei.

1. Ordinary home improvement cold water pipes: conventional home cold water branch pipes, kitchen and bathroom cold water outlet points, S5 (1.25MPa), S4 (1.6MPa) grade cold water pipes can be selected, which can adapt to the city's conventional municipal tap water pressure and meet the daily needs of cold water such as washing vegetables, laundry, and washing.

2. Ordinary home improvement hot water pipes: whole house hot water branch pipes, water heater inlet and outlet pipes, it is recommended to choose S3.2 (2.0MPa) grade hot water pipes, which are stable in heat and pressure resistance, suitable for household conventional hot water temperature and pressure, and suitable for most flat-floor home improvement construction.

3. High-rise/high-pressure residential buildings: High-rise residential water pressure fluctuations are relatively large, and the waterway pressure environment is more complex. In order to improve pipeline stability, the whole house hot water pipe can be upgraded to S2.5 (2.5MPa) high-grade pipes, and the cold water supervisor can also choose thickened S4 series pipes to reduce pipeline losses caused by water pressure fluctuations.

III. Selection according to pipe diameter specifications, taking into account both water volume and practicality

The home improvement pipe diameter does not need to be blindly selected. It can be reasonably matched according to the location of the pipeline and the number of water points, taking into account the water flow and the cost performance of the decoration.

1. Household water main pipe: As the main water supply pipe for the whole house, it is recommended to choose the De25 specification to ensure that when the whole house uses water at multiple points at the same time, the water flow will not be significantly attenuated to meet the daily water needs of the home.

2. Kitchen and bathroom branch supervisor: separate water inlet supervisor for kitchen and bathroom, De25 specification can be selected, which is suitable for the scene where showers, pots, and home appliances use water at the same time.

3. End branch pipe: single faucet, water heater, angle valve and other separate water outlet points, the conventional De20 specification can be selected, which is suitable for the conventional home improvement end water scene, and the cost performance is higher.

Fourth, home improvement PPR pipe selection to avoid pits

1. Eliminate the random mixing of hot and cold pipes: It is strictly forbidden to lay cold water pipes in hot water pipes. Long-term high temperature environments will accelerate the aging of pipes and affect the service life of pipes. The use of hot water pipes instead of cold water pipes will not affect performance, but the overall cost will increase slightly.

2. Do not blindly pursue high or low matching: low-rise ordinary residences do not need to over-select ultra-high pressure grade pipes to avoid budget waste; high-rise, top floor, and unstable water pressure apartment types are not recommended to use low-matching thin-walled pipes to avoid the risk of later leakage and pipe explosion.

3. Look for genuine pipes: AD genuine PPR pipes are produced with new raw materials. The pipe body has uniform color, no impurities, and no peculiar smell. The laser coding is clear and wear-resistant, the wall thickness is uniform, and the hot melt connection has good sealing. It is suitable for long-term use in hidden projects of home improvement. Non-standard pipe materials are uneven, prone to scaling, leakage, cracking and other problems.

4. Supporting pipe fittings of the same brand: When selecting materials, it is synchronously matched with original elbows, tee, direct, inner wire bends and other pipe fittings, and the pipe fittings have a higher degree of adaptation, and the interfaces are tightly fitted to reduce the hidden danger of water leakage.

V. Hubei's local home improvement pipeline procurement advantages

Hubei Aoyuan Building Materials Co., Ltd. is deeply involved in the Wuhan and Hubei home improvement building materials markets, and always has full specifications of Aoyuan Youjia PPR hot and cold water pipes in stock, covering mainstream specifications such as De20 and De25 commonly used in home improvement, and complete pressure grades. All pipes are genuine, and relevant quality inspection materials can be provided, which is suitable for the acceptance of hidden projects in home improvement.

Relying on the advantages of local warehousing in Wuhan, it can be quickly delivered to the whole city of Wuhan and all parts of Hubei, adapting to the construction period of home improvement. At the same time, it can provide free material selection consultation and specification matching guidance for owners and decoration companies, and solve the material selection, procurement and distribution needs of home improvement water pipes in one stop.

Contact us

If you need to consult the detailed specifications of AD PPR hot and cold water pipes, wholesale prices, and a complete set of material selection plans for home improvement, please call for consultation.

Hubei Gongyuan Building Materials Co., Ltd.

Phone/WeChat: 17399989993

Address: No. 188, Baishazhou Avenue, Hongshan District, Wuhan City