DN/OD 32
The DN/OD 32 house drainage pipe system with an outer diameter of 32 mm is suitable for discharging wastewater from sanitary facilities such as washbasins and showers. Here you will find suitable pipes, fittings, and accessories for tool-free push-fit assembly with sealing rings.
Buy DN/OD 32 — Guide & Tips
DN/OD 32 is a house drainage pipe system with an outer diameter of 32 mm, specifically designed for wastewater pipes in buildings. The pipes and fittings are made of high-quality plastic, offering high chemical resistance to household wastewater and a long service life. Typical applications include connecting sinks, showers, bidets, or toilets to the house drainage.
The system uses a socket connection technology: the pipe ends are simply inserted into the sockets fitted with sealing rings – tool-free and watertight in seconds. This connection method also allows subsequent modifications or extensions of the line. DN/OD 32 is part of a modular system that can be combined with other diameters such as DN/OD 40, DN/OD 50 or DN/OD 110 – important for transitions to main lines.
When selecting the correct pipe diameter, the connection size of the sanitary object and the required drainage capacity are decisive. DN/OD 32 is the smallest commercially available size and is suitable for single tapping points with low water flow. For washing machines, large showers, or multiple devices connected in parallel, you should opt for DN/OD 40 or 50.
When purchasing, ensure compliance with common standards for house installations, the correct design of the sealing rings, and the insertion depth. The pipes should be cut cleanly and be free of burrs so that the seal functions optimally. When making changes in direction, plan sufficient bends to avoid flow noise. With the modular design, you can build your wastewater system step by step and expand it as needed.
Popular DN/OD 32
The items shown here cover the most common applications in the DN/OD-32 system. The socket plug serves as a temporary or permanent seal – practical when preparing for a branch but not yet connecting. The double socket is the standard connector for straight pipe runs, providing a tight, detachable connection. 15-degree elbows are often used to compensate for slight directional changes, such as when approaching a siphon or wall penetration. Depending on your installation layout, elbows with 30, 45, or 87 degrees may also be required – the system provides the appropriate fitting for every situation. Before purchasing, measure the exact pipe run and note the number and angles of the elbows needed. This helps you avoid reorders and complete the installation in a single pass.
Frequently Asked Questions
What diameter do I need for my washbasin?
For standard washbasins and bidets, DN/OD 32 is the correct size. The drain spigot of these sanitary fixtures typically has an outer diameter of 32 mm. Small showers (e.g., guest showers) can also be connected with this size. For larger showers, washing machines, or dishwashers, we recommend DN/OD 40 or DN/OD 50, as they handle higher drainage volumes. Before purchasing, check the connection size of your sanitary fixture – it is usually indicated on the siphon or in the instruction manual.
Can I install DN/OD 32 outdoors?
No, the DN/OD-32 system is designed exclusively for indoor use. The plastic pipes are not permanently UV-resistant and may become brittle in frost. For outdoor applications – such as draining rainwater or connecting to a cistern – use special underground pipes (KG pipes) that are frost-proof and UV-stabilized. Even in an unheated basement, be sure to use appropriate materials if the pipe runs near an exterior wall.
How do I properly connect the pipes?
The push-fit sockets are self-sealing: push the pipe end fully into the socket – usually about 3 cm deep. The sealing rings ensure a reliable seal. Ensure the cut edge of the pipe is clean and burr-free. Use a pipe cutter or fine sandpaper if needed. A special lubricant makes insertion easier and protects the sealing rings. Avoid excessive tilting to prevent damaging the seal. After insertion, the connection is immediately watertight and can be tested for leaks.
Are the pipes compatible with older systems (imperial sizes)?
DN/OD 32 is based on the metric system (32 mm outer diameter). Older installations in Germany often use imperial sizes (e.g. 1 ¼ inch ≙ approx. 32 mm inside). Since the outer diameters can differ, the systems are not directly pluggable. For connecting to existing pipes, we offer transition pieces (reducers or adapters) that convert metric to imperial sizes. Measure the outer diameter of the existing pipe before purchase or consult a specialist dealer who can specify the correct connector.
More categories
If DN/OD 32 seems too small or too large for your project, it is worth looking at the neighboring categories of the house drainage system. The next larger diameters DN/OD 40 and DN/OD 50 are often used for washing machines, kitchen sinks or larger showers, while DN/OD 110 is the standard size for main soil pipes and WC connections. Diameters 75, 125 and 160 are also available for specific applications – for example, ventilation pipes or collecting lines in apartment buildings.
The choice of the correct diameter depends primarily on the number of connected sanitary fixtures and the required drainage capacity. Rule of thumb: the more water that has to drain simultaneously, the larger the diameter you should choose. It is best to plan your drainage system in detail in advance and use the modular design to enable later expansions at any time.
Brief summary
DN/OD 32 is the slim wastewater pipe system with 32 mm outer diameter for indoor use. It is suitable for individual sanitary fixtures such as washbasins, showers and toilets. The push-fit assembly with sealing rings enables a quick, tight and tool-free connection. The system can be combined with larger diameters and meets the usual standards for household installations. Ensure clean cut edges and use lubricant if necessary. For outdoor applications and frost-prone areas, use pipes suitable for underground installation.