Oase DN75 Filter Discharge Pipework

Oase DN75 Filter Discharge Pipework

Genuine 70mm Oase Pipes and Bends for Pond Filter Water Returns

Choose from straight discharge pipes, 45° bends and 90° bends

Oase DN75 Filter Discharge Pipework provides a simple and dependable way to construct, extend or repair the water-return pipework from a compatible Oase pond filter. Available in a choice of straight pipe lengths and angled bends, each component can be selected individually to create a return route suited to the position of your filter, pond, stream or watercourse.

The range includes 48cm and 100cm straight pipe lengths, a 45° bend and a 90° bend. Oase officially specifies the sharper bend as 87°, although it is commonly described as a 90° bend because it performs the same practical function when creating a near-right-angle change of direction.

Although the system is described as DN75, the pipework has an actual stated diameter of 70mm. It is designed for compatible Oase filter discharge connections and provides a generous outlet route for filtered water returning to the pond.

A well-planned filter outlet is essential for reliable pond circulation. Once water has passed through the filter, it must be able to leave the unit without unnecessary restrictions or complicated changes of direction. This is particularly important with gravity-return filters, where the water relies on the height of the filter outlet and a suitable downward fall to travel back towards the pond.

The straight pipe sections can be used to extend the discharge away from the filter, bridge a gap between components or create a direct return towards the pond. The 48cm length is useful where space is limited, while the 100cm pipe provides a longer section for more substantial installations.

The 45° bend creates a gradual change in direction and is ideal when the return pipe needs to be angled around equipment, landscaping or the side of a filter house. The 90° bend creates a much sharper turn where the available space does not allow a sweeping pipe route.

Genuine Oase Push-Fit Pipework

Each component uses a push-fit connection system, allowing compatible pieces to be joined together without complicated plumbing work. This makes the range suitable for both new pond installations and alterations to existing filtration systems.

Using genuine Oase discharge pipework helps ensure the components are designed to fit the corresponding DN75 system. This is important because pipework described using similar nominal measurements may not always have the same actual external diameter or connection method.

Multiple components can be combined to create the required return arrangement. For example, a straight pipe can be fitted directly to the filter outlet before adding a 45° or 90° bend to direct water towards the pond. Further straight lengths and bends can then be added where necessary.

For the best performance, keep the return route as short, direct and unrestricted as the installation allows. Avoid unnecessary bends and make sure gravity-return pipework maintains a suitable downward fall. Longer pipe runs should also be properly supported so their weight does not pull against the filter outlet.

Select the required pipe or bend from the variation menu before adding the product to your basket.

Available Variations

48cm Straight Pipe

A compact straight discharge pipe suitable for extending the outlet from a compatible Oase filter or connecting additional DN75 fittings.

100cm Straight Pipe

A longer straight pipe section for creating extended filter returns and covering greater distances with fewer joints.

45° Bend

Provides a gradual change of direction and is useful for creating smoother pipe routes around filters, equipment and landscaping.

90° Bend

Creates a near-right-angle change of direction where installation space is restricted. Oase technically specifies this fitting as an 87° bend.

Key Benefits

• Genuine Oase filter discharge pipework
• Choice of four useful pipework variations
• Available in 48cm and 100cm straight lengths
• Choice of 45° or 90° connection bends
• DN75 system with a stated 70mm diameter
• Simple push-fit connection system
• Components can be combined as required
• Suitable for new installations and existing repairs
• Helps create neat and effective pond returns
• Suitable for gravity-return filtration systems
• Discreet black finish
• Designed for compatible Oase filter outlets

Compatible Oase Filter Ranges

These fittings are suitable for selected filters within ranges including:

• Oase BioSmart
• Oase BioTec
• Oase BioTec ScreenMatic
• Oase ScreenMatic
• Oase FiltoMatic
• Selected Oase ProfiClear systems

Compatibility varies between individual models and product generations. Some larger Oase filters use DN110 pipework instead of DN75, so check the outlet diameter of your exact filter before ordering.

Common Uses

• Constructing a new pond filter return
• Extending an existing Oase discharge pipe
• Replacing cracked or damaged pipework
• Directing filtered water back towards the pond
• Returning water into a stream or waterfall
• Routing pipework around a filter house
• Altering the direction of a filter outlet
• Connecting compatible DN75 components
• Creating a gravity-fed water return
• Modifying an existing pond filtration system

Choosing the Correct Variation

Choose a straight pipe when you need to extend the filter outlet or cover a distance between the filter and the pond return.

The 48cm pipe is best for compact installations and shorter extensions. The 100cm pipe is more suitable for longer returns and can reduce the number of joints required.

Choose the 45° bend where a gradual change of direction is possible. This generally creates a smoother and less restrictive pipe route.

Choose the 90° bend where space is limited and the pipework must make a sharper turn. Where possible, avoid using more sharp bends than necessary, particularly on gravity-return systems.

Installation Advice

Plan the complete water-return route before assembling the pipework. Confirm that you have enough straight sections, bends and supporting fittings to complete the installation.

Ensure that all connecting surfaces are clean before joining the components. Align each fitting carefully and push it fully into position to create a secure connection.

Gravity-return pipework should maintain a suitable downward fall from the filter towards the pond. Avoid dips, raised sections and unnecessary restrictions that could cause water to back up inside the filter.

Support long pipe runs independently rather than allowing their full weight to hang from the filter outlet. Once the system is running, inspect every joint for leaks and confirm that water is returning freely.

Related Oase DN Pipework and Compatible Filters

Choose DN75 where the filter, module or discharge outlet specifies DN75 pipework. DN75 is often used on Oase flow-through filter outlets and selected ProfiClear sludge-discharge connections.

If your installation involves larger ProfiClear or BioTec outlet connections, check whether DN110 pipework is required instead.

• Oase DN50 Filter Discharge Pipework
• Oase DN110 Filter Discharge Pipework
• Browse Oase BioSmart filters
• Browse Oase ScreenMatic filters
• Browse Oase ProfiClear filters

Product Specifications

Brand: Oase
Product range: DN75 Filter Discharge Pipework
Product type: Pond filter outlet and water-return pipework
Pipework system: DN75
Actual stated diameter: 70mm
Connection method: Push fit
Colour: Black
Application: Filter discharge and filtered-water return
Available options: 48cm pipe, 100cm pipe, 45° bend and 90° bend
Suitable for: Compatible Oase pond filtration systems
Quantity supplied: One selected pipe or bend