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Multi-bolt tensioning for large-diameter pipelines — DN325 to DN2000
Learn More →Steel Test Plugs (0,5 - 2,5 bar)
Steel test plugs for testing and locating leaks in sewers, drainage systems, pipelines and gullies — safe where flow must continue or be diverted during repair.
- Size range15 — 300 mm
- Back pressure0,5 – 2,5 bar
- MaterialSteel (NR/SBR, CR, EPDM seal)
- BypassWith bypass (M8 – 1")
- Working temp.−20 to +80 °C
Description & features
Designed for testing and locating leaks of sewers, drainage systems, pipelines, and gullies. Produced according to customer needs and application requirements, Steel Test Plugs are ideal for pipe testing, and they are safe to use in conditions where the flow must continue or be diverted during pipe repair.
Key Features
- Durable steel body: size range DN15 — DN300, back pressure 0,5 – 2,5 bar depending on size.
- Integrated bypass: M8 up to 1" connection for controlled filling, drainage or flow diversion.
- Seal material choice: NR/SBR, CR or EPDM, operating from −20 to +80 °C.
- Corrosion resistant, light weight: safe operation and easy handling on site.
- Customizable: modified upon customer needs and application requirements.
Application Areas
- Sewers & drainage systems: testing and locating leaks, including gullies.
- Pipelines: low-pressure testing and temporary sealing during maintenance.
- Flow management: safe where flow must continue or be diverted during pipe repair.
Recommended installation procedure
Plugline mechanical test plugs seal by compressing a rubber element against the pipe wall. Follow the procedure below for safe installation and removal.
Check the plug body, rubber seal and bolts for damage. Confirm the reference matches the inner diameter of the pipe to be sealed.
Clean the pipe end and insert the plug so the sealing element sits fully inside the bore, square to the pipe axis.
Tighten the bolts evenly in a crosswise pattern. The rubber seal compresses and expands against the pipe wall until firmly seated.
Apply test pressure per EN 1610 or local code, staying within the back-pressure rating. Use the bypass for filling, venting or drainage.
Relieve pressure through the bypass, loosen the bolts and withdraw the plug. Clean and inspect before storage — reusable across many cycles.
Datasheets & catalogues
Download the technical catalogue for the Mechanical Pipe Plug range — full size tables, back pressures, bypass options and materials.
Find your model
Enter the measured inner diameter of the pipe to be tested or sealed — every model whose sealing range covers it is shown below.
Available models
20 active references.
| Quantity | Product Code | Nominal size (mm) | Min. inner dia. | Max. inner dia. | Product diameter | SCH STD pipe inner dia. | Back pressure | Bypass diameter | Length | Weight | Configure |
|---|---|---|---|---|---|---|---|---|---|---|---|
0 | STP15 | DN15 | 15mm/0,59" | 18mm/0,71" | 14mm/0,55" | 15,76mm/0,62" | 2,5bar/36,26psi | M8 | 122mm/4,8" | 0,07kg/0,15lbs | |
0 | STP20 | DN20 | 19mm/0,75" | 24mm/0,94" | 18mm/0,71" | 20,96mm/0,83" | 2,5bar/36,26psi | M8 | 122mm/4,8" | 0,1kg/0,22lbs | |
0 | STP25 | DN25 | 25mm/0,98" | 38mm/1,5" | 24mm/0,94" | 26,64mm/1,05" | 2,5bar/36,26psi | M10 | 122mm/4,8" | 0,11kg/0,24lbs | |
0 | STP32 | DN32 | 33mm/1,3" | 44mm/1,73" | 32mm/1,26" | 35,08mm/1,38" | 2,5bar/36,26psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,16kg/0,35lbs | |
0 | STP40 | DN40 | 39mm/1,54" | 53mm/2,09" | 38mm/1,5" | 40,94mm/1,61" | 2,5bar/36,26psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,22kg/0,48lbs | |
0 | STP50 | DN50 | 51mm/2,01" | 66mm/2,6" | 50mm/1,97" | 52,48mm/2,07" | 2,5bar/36,26psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,33kg/0,73lbs | |
0 | STP65 | DN65 | 61mm/2,4" | 79mm/3,11" | 60mm/2,36" | 62,68mm/2,47" | 2,5bar/36,26psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,26kg/0,57lbs | |
0 | STP80 | DN80 | 76mm/2,99" | 89mm/3,5" | 75mm/2,95" | 77,92mm/3,07" | 1,5bar/21,76psi | 12,70mm/ 1/2" | 82mm/3,23" | 0,3kg/0,66lbs | |
0 | STP90 | DN90 | 85mm/3,35" | 103mm/4,06" | 84mm/3,31" | 90,12mm/3,55" | 1bar/14,5psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,39kg/0,86lbs | |
0 | STP100 | DN100 | 99mm/3,9" | 112mm/4,41" | 98mm/3,86" | 102,26mm/4,03" | 0,7bar/10,15psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,41kg/0,9lbs | |
0 | STP115 | DN115 | 110mm/4,33" | 128mm/5,04" | 109mm/4,29" | 117mm/4,61" | 0,7bar/10,15psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,54kg/1,19lbs | |
0 | STP125 | DN125 | 126mm/4,96" | 139mm/5,47" | 125mm/4,92" | 128,2mm/5,05" | 0,5bar/7,25psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,55kg/1,21lbs | |
0 | STP140 | DN140 | 135mm/5,31" | 152mm/5,98" | 134mm/5,28" | 141mm/5,55" | 0,5bar/7,25psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,71kg/1,56lbs | |
0 | STP150 | DN150 | 149mm/5,87" | 164mm/6,46" | 148mm/5,83" | 154,08mm/6,07" | 0,5bar/7,25psi | 12,70mm/ 1/2" | 85mm/3,35" | 0,71kg/1,56lbs | |
0 | STP175 | DN175 | 171mm/6,73" | 196mm/7,72" | 170mm/6,69" | 178mm/7,01" | 0,5bar/7,25psi | 25,40mm/ 1" | 139mm/5,47" | 1,79kg/3,95lbs | |
0 | STP200 | DN200 | 195mm/7,68" | 218mm/8,58" | 194mm/7,64" | 202,64mm/7,98" | 0,5bar/7,25psi | 25,40mm/ 1" | 134,5mm/5,3" | 1,96kg/4,32lbs | |
0 | STP225 | DN225 | 219mm/8,62" | 245mm/9,65" | 218mm/8,58" | 227mm/8,94" | 0,5bar/7,25psi | 25,40mm/ 1" | 134,5mm/5,3" | 2,31kg/5,09lbs | |
0 | STP250 | DN250 | 246mm/9,69" | 290mm/11,42" | 244mm/9,61" | 254,46mm/10,02" | 0,5bar/7,25psi | 25,40mm/ 1" | 176mm/6,93" | 3,07kg/6,77lbs | |
0 | STP275 | DN275 | 272mm/10,71" | 305mm/12,01" | 270mm/10,63" | 279mm/10,98" | 0,5bar/7,25psi | 25,40mm/ 1" | 200,75mm/7,9" | 3,62kg/7,98lbs | |
0 | STP300 | DN300 | 297mm/11,69" | 335mm/13,19" | 295mm/11,61" | 304,84mm/12" | 0,5bar/7,25psi | 25,40mm/ 1" | 208,75mm/8,22" | 4,07kg/8,97lbs | |
Send the spec. We send the datasheet.
DN, material, air connection, quantity. We come back inside 24 hours with the right reference, the test report on file, and stock confirmation from Istanbul.
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