Universal Step Coupling
Connect pipe ends using two independently specified sealing ranges. Select the exact product row and assembly drawing.
Pipe compatibility
Pipe-material compatibility must be confirmed for the selected configuration. Supply the actual pipe material and measured outside diameter.
Product overview
Connect pipe ends using two independently specified sealing ranges.
Pipe compatibility
Pipe-material compatibility must be confirmed for the selected configuration. Supply the actual pipe material and measured outside diameter.
Connection arrangement
Pipe end in range 1 → pipe end in range 2
Connection and selection
Two sealing ranges
Match each end to its listed sealing range. Different pipe ODs can occur within the same nominal size.
Pipe material
Provide the pipe material and measured OD. A range or family name does not establish universal pipe compatibility.
Assembly selection
Confirm the seal, service conditions and required installation dimensions for the selected size.
Catalogue dimensions
Source: AQUAFITTING English catalogue 2023, page 33. Dimension symbols follow the corresponding source drawing. Confirm the selected configuration and current dimensions before ordering. Use both actual pipe OD ranges for selection; catalogue DN pairings are retained as printed.
| Catalogue DN pairing | SR1 (mm) | SR2 (mm) | L (mm) | L1 (mm) |
|---|---|---|---|---|
| 40-50 | 46-76 | 57-74 | 210 | 100 |
| 40-65 | 46-76 | 63-85 | 210 | 100 |
| 50-65 | 57-74 | 63-85 | 210 | 100 |
| 50-80 | 57-74 | 84-107 | 210 | 100 |
| 65-80 | 63-85 | 84-107 | 210 | 100 |
| 80-100 | 84-107 | 99-119 | 210 | 100 |
| 100-100 | 84-107 | 107-133 | 210 | 100 |
| 100-100 | 99-119 | 107-133 | 210 | 100 |
| 100-125 | 99-119 | 132-159 | 210 | 100 |
| 100-125 | 107-133 | 132-159 | 210 | 100 |
| 100-150 | 107-133 | 157-184 | 230 | 115 |
| 125-150 | 132-159 | 157-184 | 230 | 115 |
| 150-150 | 157-184 | 184-207 | 230 | 115 |
| 150-200 | 184-207 | 206-230 | 230 | 115 |
| 150-200 | 184-207 | 216-246 | 250 | 140 |
| 200-200 | 206-230 | 216-246 | 250 | 140 |
| 200-225 | 184-207 | 242-268 | 250 | 140 |
| 200-225 | 216-246 | 242-268 | 250 | 140 |
| 225-250 | 242-268 | 266-297 | 270 | 160 |
| 250-250 | 266-297 | 280-306 | 270 | 160 |
| 250-300 | 266-297 | 301-327 | 270 | 160 |
| 300-300 | 301-327 | 324-350 | 270 | 160 |
| 300-350 | 301-327 | 345-375 | 270 | 160 |
| 300-350 | 324-350 | 345-375 | 270 | 160 |
| 350-350 | 345-375 | 372-397 | 270 | 160 |
| 350-350 | 372-397 | 386-415 | 270 | 160 |
| 350-400 | 386-415 | 408-436 | 270 | 160 |
| 400-400 | 408-436 | 425-459 | 270 | 160 |
Technical evidence
Review the product identity and available resources, then send the required size or measured outside diameter, pipe material, connection details, operating conditions, quantity, destination and supporting files.
Technical Downloads
Product selection
product name; DN or nominal size; actual pipe outside diameter; pipe material; end condition; working pressure; quantity; destination; required drawing or catalogue
