PE sewer pipes and fittings

The polyethylene pipe and fittings system for sewage. The polyethylene pipes are produced through polyethylene granules extrusion (PE80 or PE100).  

The polyethylene pipes have a smooth interior and exterior side, are flexible and resist to exterior temperatures up to -30°C. The polyethylene pipes and fittings are used in numerous fields out of which we mention: 

  • Sewage network in gravity system or in pressure
  • Internal sewage for construction.

The estimated lifetime is of minimum 50 years, on the condition that the pressure and temperature as well as installation technologies are followed.

The polyethylene pipes and fittings are known for their use in gas and water supply and distribution networks, but they are also successfully used in sewage systems gravity buried and especially in those for pressure.   

See TeraPlast Catalog

You can find the complete range of products in the TeraPlast 2020 catalog.

Features and advantages of polyethylene pipe and fittings


The low weight of the PE pipe and fittings system components ensures an extremely high manoeuvrability in terms of transport, storage and handling as well as its installation.


The inner surface of the pipes and fittings is extremely smooth so that no material deposits can form inside and thus the pressure losses are minimized. 


These features allow the transport of fluids at speeds of over 7m / sec without erosion problems, even in case of acidic or alkaline substances with pH between 1 and 14.


The flexibility and elasticity of polyethylene pipes recommends them for use in areas with seismic risk. 


It is a fuamental feature of this type of systendm. The system parts can be combined through various special welding technologies available for constructors


Both PE pipes and fittings have a high chemical resistance to most aqueous solutions, to the aggressive action of soil materials, inorganic salts and most acids and bases even at high concentrations and high temperatures. 


From this point of view, polyethylene pipes are ignited and burn slowly, but they do not maintain combustion and are self-extinguishing (class C4). 


The PE pipe is subject to electrostatic phenomena due to the high resistance of the material. Grounded pipes are subject to accumulation of charges due to the environment humidity and extensive network – land contact. 

There are often situations when a certain part of the sewage system is in pressure system (pumped sewage). In these cases the most recommended system is the polyethylene pipe and fitting system due to the fact that the elements are joint through welding that ensures the system tightness in case of pressure higher than 0.5 bars, the test pressure for PVC sewage networks joint with socket and gasket. 

Although polyethylene pipes are produced for networks where pressures can reach up to 25 bar, in most cases in the sewage systems are used pipes with nominal pressures of 3.2 or 4 bar. Polyethylene pipes for sewage are black, without stripes or black with brown stripes.

The range of diameters for sewage pressure pipes offered by Terasplast is between 200 and 630 mm and is delivered into bars of 12 m long.

Here are some of the features and benefits of using polyethylene pipes and fittings.

Features and benefits of polyethylene pipe and fittings

Corrugated PP pipes and fittings for external sewers

Corrugated PP pipes and fittings for external sewersThe pipes are made through co-extrusion, in accordance with the SR EN13476-3:2007 standard, resulting a pipe with a smooth light colour interior wall that facilities video inspection, with an extremely reduced roughness and a profiled type exterior wall. The profiled exterior wall provides resistance to external charges, being …