1, from the connectivity perspective, aluminum-plastic pipe used in the physical connection, simple, convenient, unless the improper operation of its security and reliability is very high. PE and PP-R is applied hot melt or fused connections, complex process, easy to produce material defects in the heap area, leading to stress concentration, long-term performance impact of pipeline; In addition, the local high-temperature electrical fuse easy to promote the degradation of pipe materials to accelerate the aging pipeline .

2, from the long-term health performance perspective, the middle Al layer of aluminum-plastic pipe cut off oxygen, easily lead to the breeding of micro-organisms and algae, generally allow the outer layer of PE plus antioxidants and will not cause water pollution in the inner, PE pipe and PP-R pipe oxygen can not be separated, easily lead to micro-organisms and algae reproduction, affecting drinking water and sanitation; and contains large amounts of antioxidants, could easily lead to water pollution.

3, from the high-temperature performance of view, aluminum-plastic tubes under the national standard long-term use temperature of 95 ℃, maximum operating temperature is 110 ℃, fully meet the needs of domestic water; PE pipe performance with increasing temperature decreased rapidly, only limited to the cold water delivery; PP-R GB under the long-term use temperature of 70 ℃, maximum operating temperature is 95 ℃, the use of the hot water pipes have some limitations.

4, from the anti-aging properties of view, stability of the molecular structure of aluminum-plastic tube, inside and outside the PE layer is separated from the outer layer by adding enough to allow the anti-light, oxidation stabilizers without affecting the health of the inner contact with water; PE pipe the molecular structure of stable, But the single-layer structure is not conducive to join the stabilizing agent, easily lead to secondary pollution of water inside the tubes; PP-R pipes which have a large number of unstable tertiary carbon atoms, vulnerable to light, oxygen and impurities in the role of aging.