Mechanical Pipe Plugs & Shut-Off-Discs
We offer Mechanical Pipe plugs and shut-off-discs for the secure sealing, closing, and testing of pipelines across a wide range of applications. We stock a large selection of water- and oil-resistant pipe end closures suitable for various pipe diameters and use - ideal for sewer systems, plumbing, industrial facilities, pipe rehabilitation projects, as well as water and wastewater treatment plants.
Our product range includes pipe plugs - available with or without a bypass - as well as mechanical shut-off-discs in both aluminum and steel versions. We also offer durable solutions for temporary line closures, pressure testing, and pipeline maintenance work. Furthermore, we provide high-pressure pipe end closures, also available with or without a bypass-capable of withstanding back-pressures of up to 12 bar.
Mechanical Pipe Plug and Pipe Test Plug DN 12 - 90
Pipe stoppers based on nitrile rubber (water and oil resistant). With metal parts made of galvanized steel. Pipe plugs for shutting off and testing pipelines, suitable for internal pipe pressures up to 8 bar. Nominal width depending on model from 12 - 90 mm. Range of application depending on model from 11.8 mm - 99 mm. Plug length depending on model 20.0 - 40.0 mm. Pipe plugs are mechanical devices designed for the secure sealing, blocking, or testing of pipelines of various types. They are suitable for both short-term operations and extended applications in sewer systems, pipe rehabilitation projects, water and wastewater facilities, or industrial environments. Thanks to their robust construction, mechanical pipe plugs offer a reliable and durable solution for the temporary decommissioning or sealing of lines These plugs are installed directly inside the pipe and are securely pressed against the pipe wall - either through mechanical tension or via the contact pressure exerted by the rubber body. This creates a reliable seal without the need for compressed air or an external supply. Unlike inflatable pipe stoppers, mechanical pipe plugs do not require air inflation; consequently, they are particularly low-maintenance and offer excellent long-term stability. Each pipe plug covers a specific diameter range. For instance, a DN 50 pipe plug is typically suitable for pipe diameters ranging from approximately 48 to 55 mm. Precise details regarding the specific application range for each product can be found under the "Technical Details" section. A major advantage of mechanical pipe plugs is their exceptional long-term stability. Depending on the specific application and operating conditions, they can often remain inside the pipe for several days or weeks without requiring pressure replenishment or readjustment. This makes them ideally suited for extended construction phases, pipe rehabilitation projects, leak testing, or maintenance work in industrial facilities. Our pipe plugs are also available with a central bypass port. For work environments involving elevated temperatures - such as in heating systems or certain industrial processes - we also offer plugs that are temperature-resistant up to 230°C. To be observed: For internal pipe pressures > 1 bar the pipe stoppers must be secured against slipping out.
Mechanical Pipe Plug and Pipe Test Plug with Bypass DN 16 - 90
Pipe stoppers based on nitrile rubber (water and oil resistant), with bypass. With metal parts made of galvanized steel. Pipe plugs for shutting off and testing pipelines, suitable for backpressure up to 8 bar. Nominal width depending on model from 16 - 90 mm. Range of application depending on model from 15.6 mm - 99 mm. Plug length depending on model 20.0 - 40.0 mm. Advantages of Mechanical Pipe Plugs High pressure resistance – suitable for applications with increased back pressure. In general, pipe plugs and sealing discs must be secured against slipping out when internal pipe pressure exceeds 1 bar. Suitable for long-term use – depending on the application, they can remain safely installed inside the pipe for extended periods. Temperature-resistant versions available – ideal for applications involving higher temperatures or demanding operating conditions. Compact and space-saving design – perfect for tight pipe systems and hard-to-reach areas. Reusable and durable – robust materials ensure a long service life and allow for multiple uses.
Mechanical Pipe Plug DN 12 - 90, Temperature resistant up to 230°C
Pipe stoppers based on nitrile rubber (water and oil resistant). With metal parts made of galvanized steel. Temperature resistant up to 230°C. Pipe plugs for shutting off and testing pipelines, suitable for internal pipe pressures up to 8 bar. Nominal width depending on model from 12 - 90 mm. Range of application depending on model from 11.8 mm - 99 mm. Plug length depending on model 20.0 - 40.0 mm. To be observed: For internal pipe pressures > 1 bar the pipe stoppers must be secured against slipping out.
Shut-Off Discs with 1 Sealing Ring, Aluminium, with Central Wingnut DN 40 - 600
Mechanical shut-off disc with 1 sealing ring, with passage (1/2", 1" or 2") for shutting off and testing pipelines, mainly for pressureless sealing. Our pipe shut-off discs are suitable for all types of pipes and are resistant to service water and waste water. The passage discs have a screwed-on inspection cover with sealing ring. Materials: sealing ring made of NR rubber and disc made of aluminium. Available nominal widths from DN 40 - 600. Materials: Seal ring made of NR rubber and disc made of aluminum. Available nominal diameters range from DN 40 to DN 600. The maximum back pressure varies depending on the diameter, between 2.0 and 0.2 bar. Common applications of our sealing discs include: Sealing aquariums and ponds (also available without copper components) Sealing gas pipelines in industrial environments Base component for structural installations, e.g., for centering Sealing off dead-end pipes Pressure testing of heating pipes Sealing pipes in power plants and heating systems (silicone version suitable for up to 230°C) Sealing short pipes or where space is limited inside the pipe Leak testing in confined spaces
Shut-Off Discs with 1 Sealing Ring, Steel Version, with Central Wingnut DN 40 - 450
Mechanical shut-off disc with 1 sealing ring, with passage (1/2" and 1") for shutting off and testing pipelines, mainly for pressureless closing. Our pipe shut-off disks are suitable for all types of pipes and are resistant to service and waste water. The passage discs have a screwed-on inspection cover with sealing ring. Materials: sealing ring made of NR rubber and disc made of steel. Available nominal widths from DN 40 - 450. Materials: Sealing ring made of NR rubber and disc made of steel. Available nominal diameters range from DN 40 to DN 450. The maximum back pressure varies depending on the diameter, between 2.0 and 0.3 bar. Common applications of our shut-off discs include: Sealing aquariums and ponds (also available without copper components) Sealing gas pipelines in industrial settings Base element for construction, e.g., for centering Sealing off dead-end pipes Pressure testing of heating pipes Sealing pipes in power plants and heating systems (silicone version withstands up to 230°C) Sealing short pipes or where space is limited inside the pipe Leak testing in confined spaces
Small Pipe Sealing Plug with Schrader Valve, 2.5 bar, Pipe Diameter 20 - 75 mm
Small pipe sealing plug "Plugy" with schrader valve for application ranges from 20 - 75 mm, suitable for all types of pipelines. The valve is protected with a metal cover. This cap can also be used to repair the valve, just put it on upside down and unscrew the valve inside. Please note: The smallest bladder has a safety chain with a large ring so that the product cannot slip into the tube and get lost. Chain and ring can be removed individually! The towing eyelet cannot be removed. For automated test procedures or other industrial applications, we therefore recommend ordering this version from us in advance without the chain and also without the shackle. This is currently only possible on request, as it is a custom-made product. The price remains the same. If you are interested, please give us a call, send us an e-mail or use our contact form. We will be happy to advise you! Robust, reliable pipe sealing plug in 3 sizes: Application range 20 - 33 mm (with attached ring, chain and mounting) Application range 33 - 40 mm Application range 50 - 75 mm All three available sizes have a tyre valve and can thus be easily inflated with a hand air pump. Operating pressure 2.5 bar.
High Pressure Pipe Stopper With Bypass, Based On NBR-Rubber DN 85 - 255
High-pressure pipe closure with single rubber seal and bypass. Material nitrile rubber (water and oil resistant), With metal parts made of galvanized steel. Pipe plug for shutting off and testing pipelines, suitable for back pressure up to 12 bar. Nominal diameter depending on model from 85 - 255 mm. Range of application depending on the model from 78 mm - 266 mm. Rubber ring length depending on model 40.0 - 44.0 mm. To be observed: For back pressure > 1 bar the pipe stoppers must be secured against slipping out.
Mechanical Pipe Plug and Pipe Test Plug with Bypass DN 16 - 90, Temperature resistant up to 230°C
Pipe stoppers based on nitrile rubber (water and oil resistant), with bypass. With metal parts made of galvanized steel. Temperature resistant up to 230°C. Pipe plugs for shutting off and testing pipelines, suitable for internal pipe pressures up to 8 bar. Nominal width depending on model from 16 - 90 mm. Range of application depending on model from 15.6 mm - 99 mm. Plug length depending on model 20.0 - 40.0 mm. To be observed: For internal pipe pressures > 1 bar the pipe stoppers must be secured against slipping out.
Big Pipe Shut-Off Disc with Bypass and Multi Closure, 0.2 to 0.3 bar, NR Sealing Ring
Pipe Shut-Off Disc DN 425 - 575 with Multi Closure and 1 Sealing Ring. Mechanical pipe shut-off with 2" Bypass. Suitable for all types of pipelines, water resistant. Maximum back pressure: 0.2 - 0.3 bar. Material: Disc made of steel with aluminium coating, Sealing ring made of natural (NR) rubber.
Inflatable PVC Sealing Bags, fitted with 1.5m Inflation Hose & Schrader Valve
Different versions for pipe diameters from 30 to 320 mm. Hose length in all variants :150 mm, i.e. 6".Made of soft PVC, without a reinforcing fabric insert. This means that the pipe closure adapt to the profile of the pipe to a certain extent. Please note the respective area of application.No air compressor required! The product is inflated with a normal air pump. Thanks to the permanently attached hose and car valve, immediately Ready for use when time is of the essenceIdeal for uncomplicated shut-off in/on buildings, e.g. for roof drains, floor drains and others bent pipes in the house area. Due to the flexible material, the pipe seals are suitable for pipes with slight deformations. This pipe seal can also be used against pressing flood water up to a water column of 5 m (corresponds to 0.5 bar back pressure).For filling, please only use hand-operated air pumps with a manometer. The maximum operating pressure is 1 bar for all sizes. A standard bicycle pump is ideal, for example, provided it has an attachment for tire valves. If required, you will find a suitable hand pump with an ergonomic handle in our shop.Available sizes 40 mm / 1.5" (application range 30-45 mm) 50 mm / 2" (application range 45-57 mm) 75 mm / 3" (application range 71-91 mm) 100 mm / 4" (application range 82-110 mm) 150 mm / 6" (application range 126-160 mm) 200-300 mm / 8-12" (application range 200-320 mm)
High Pressure Pipe Stopper based On NBR-Rubber, up to 12 bar, DN 85 - 255
High-pressure pipe closure, based on nitrile rubber (water and oil resistant). With metal parts made of galvanized steel. Pipe closure for shutting off and testing pipelines, suitable for back pressures up to 12 bar. Nominal diameter depending on model from 85 - 255 mm. Range of application depending on the model from 78 mm - 266 mm. Rubber ring length depending on model 40.0 - 44.0 mm. To be observed: For back pressures > 1 bar the pipe stoppers must be secured against slipping out.
Pneumatic Pipe Plug DN 200 - 600, Bypass 1" and 2"
Pneumatic pipe stopper for the closing of pipelines up to 4 bar back pressure. Consists of a robust metal core with a passageway and a high-quality rubber jacket, inflatable via an auto valve. Depending on the model, the nominal width of the pipe closure ranges from DN 200 - 600, with 1" or 2" passage. The maximum inflation pressure is 6 bar. Suitable for temperature ranges from -20 to +80°C.
Shut-Off Discs with 2 Sealing Rings, Steel, with Central Wingnut DN 40 - 400
Mechanical shut-off disc with 2 sealing rings, with passage (1/2" or 1") for shutting off and testing pipelines, mainly for pressureless closing. Our pipe shut-off disks are suitable for all types of pipes and are resistant to service and waste water. The passage discs have a screwed-on inspection cover with sealing ring. Materials: Sealing rings made of NR rubber and disc made of steel. Available nominal widths from DN 40 - 400.
Aluminum shut-off disc with bypass, two sealing rings, 40-400 mm
Mechanical shut-off disc with 2 sealing rings, with bypass (1/2" or 1") for shutting off and testing pipelines, mainly for pressureless closing. Our pipe shut-off disks are suitable for all types of pipes and are resistant to service and waste water. These bypass discs have a screwed-on inspection cover with sealing ring. Materials: sealing rings made of NR rubber and disc made of aluminium. Available nominal widths (inner diameter): 40 - 400 mm.