DN/OD 110
In this category you will find DN/OD 110 pipes and fittings for your sewer pipe system. The 77 items include, among others, KG pipes, bends, and branches for wastewater installation.
Buy DN/OD 110 — Guide& Tips
The DN/OD 110 sewer pipe system is the standard diameter for most house connections and main drains in residential and commercial areas. With 77 items in this category, a wide range of pipes, bends, branches, and connectors is available — all designed for the 110-millimeter outer diameter. Typical uses include draining rainwater and wastewater from the house to the property boundary, or within basement and ground-floor installations.
What should you pay attention to when buying? The key factor is the material choice: KG pipes made of PVC-U are rigid, pressure-resistant, and optimized for underground pipes. They are available in stiffness classes SN 2 to SN 8 — for car-accessible surfaces we recommend at least SN 4, for truck loads SN 8. In addition, there are cast iron pipe connections, which are particularly sound-insulating and are used in buildings or where increased fire protection requirements apply. When selecting, pay attention to the correct nominal width (DN/OD 110) and compatibility with existing sockets or plug connections.
Typical variants in this category are straight pipes in lengths from 0.5 m to 5 m, bends with 15°, 30°, 45° or 87° angles, as well as branches and reducers. Suitable gaskets or adhesive sockets are required for sealing – these can also be found in the range. Always plan for some reserve: when laying underground, pipes should be installed frost-free at a depth of at least 80 cm, and every connection must be sealed according to the manufacturer's specifications.
A common mistake: using HT pipes (heating/drinking water) in the ground. These are not designed for static loads. Use only KG pipes or approved alternatives for sewerage. For questions on sizing, the rule of thumb helps: for a single-family home, DN/OD 110 is sufficient as the main line; for multi-family homes or long pipe runs, you should use DN/OD 125 or DN/OD 160. Compare the DN/OD 125 and DN/OD 160 categories.
Popular DN/OD 110 products
These three product types cover the most common applications: the straight pipe for line installation, the bend for direction changes, and the cap for temporary or permanent closures. They form the basic framework of any duct installation and are needed in almost every project.
Straight sewer pipe for underground wastewater lines. Ideal for house connections, main drains, and rainwater drainage. Compatible with all KG socket joints.
Direction change by 45° for sewer pipe systems. Enables flexible line routing around obstacles or for gradient compensation. Also available as a 2-meter version.
End cap for pipe ends or sockets. Seals temporarily during construction work or permanently for decommissioned connections. Quick to install and removable.
The straight KG pipe DN 110 is the most common item in this category – it is continuously needed for new builds, renovations, and repairs. The 45° bend is the standard solution for gradient changes or deflections, while the cap is mainly used in construction projects with later connection or as a temporary safeguard. All three products are mutually compatible and can be combined with standard KG systems.
Frequently asked questions about DN/OD 110
What exactly does DN/OD 110 mean?
DN/OD stands for 'Diameter Nominal / Outer Diameter' – i.e. the nominal diameter based on the outer diameter. For DN/OD 110, the outer diameter of the pipe is 110 millimetres. This is the standard diameter for house connections and main drains in wastewater technology. The wall thickness varies depending on the stiffness class (SN 2 to SN 8), so the inner diameter is between about 104 and 107 mm. Important: Do not confuse DN/OD with DN/ID (inner diameter) – for sewer pipes the outer diameter is almost always specified.
Which stiffness class (SN) do I need for my project?
The stiffness class indicates how pressure-resistant the pipe is against earth and traffic loads. For purely garden areas without vehicle traffic, SN 2 (2 kN/m²) is sufficient. For car-accessible areas such as driveways or parking lots, we recommend SN 4 (4 kN/m²). For truck loads or deep trenches (from 2 m cover), SN 8 (8 kN/m²) is required. In the DN/OD 110 category you will find all common classes – check the installation situation before purchasing. If in doubt, choose SN 4 as a compromise for most applications.
Can I combine KG pipes with cast iron pipe connections?
Yes, that is possible and is often needed in renovations when old cast iron pipes are to be connected to modern KG systems. There are special cast iron pipe transition pieces or cast iron adapter (KG-Guss-Adapter) that are available in this category. Make sure that the adapter matches the outer diameter of the cast iron pipe – old cast iron pipes often have different dimensions. Measure the diameter of the existing cast iron pipe carefully before purchasing. The connection is then made with a compression or push-fit socket and sealed with a gasket.
How deep do I need to lay a KG pipe DN 110?
The minimum laying depth for KG pipes in the ground is usually 80 cm to the pipe invert to ensure frost protection. In regions with harsh winters or highly permeable soils, you should plan for 100 cm. Under traffic loading, add the frost line depth plus a 20 cm protective layer. Also pay attention to the slope: for wastewater pipes, at least 1-2% slope (1-2 cm per meter) is required; for rainwater, 0.5-1% is sufficient. Too little incline leads to deposits and blockages.
Other categories – Alternatives to DN/OD 110
DN/OD 110 is the most commonly used diameter, but not the optimal choice for every situation. If you are planning an apartment building, a commercial facility, or a long pipeline with many connections, a larger diameter may be advisable. The need for larger nominal widths also increases for rainwater drainage from large roof areas or for pump lines with high flow rates.
DN/OD 110 – For long service pipes or commercial applications.
DN/OD 200 – For high flow rates or as a collector line for multiple buildings.
Sewer pipe system (overview) – All diameters and components at a glance.
For most single-family homes and smaller projects, DN/OD 110 remains the right choice. Only for larger buildings, long pipe runs, or special local conditions should you switch to the next larger diameters. The Parent category: Sewer pipe system provides a complete overview of all available nominal diameters from DN/OD 110 to DN/OD 315 as well as matching fittings and seals.
In a nutshell
The category DN/OD 110 includes 77 articles for wastewater and rainwater drainage in residential and property areas. The core consists of KG pipes made of PVC-U in various stiffness classes (SN 2 to SN 8), supplemented by bends, branches, reducers, and caps. The outer diameter of 110 mm is the standard for house connections and is suitable for single-family homes, smaller multi-family homes, and light traffic areas. When selecting, pay attention to the correct stiffness class for your installation situation, the right pipe length, and compatibility with existing systems. For larger projects, the diameters DN/OD 125, DN/OD 160, and DN/OD 200 are available.