External Coupler or female coupler is a part of STÖRNCH SpiraSafe's a well-established system of ventilation fittings. Available in diameters from Ø100mm to Ø400mm, this system delivers significant benefits to installers and end users. Designed without rubber gaskets for direct fitting-to-fitting connections, this coupler matches spiral tube diameters to allow internal fitting insertion.
This external coupler is made with galvanised steel pressed bend, seamwelded and calibrated. Ideal for both commercial and domestic ventilation applications across the UK, this external (female) connector ensures a precise fit within any spiral duct system, making installation quick and efficient.
Key Features
- External/ female coupler for spiral ducting systems
- Made with galvanised steel pressed bend, seamwelded and calibrate
- When used as a part of the system it offers exceptional Class D Air Tightness
- Cost effective, aesthetic and time saving (up to 40% on your labour!)
Applications
- HVAC ducting installations requiring secure connections
- Connecting spiral duct sections and fittings
- Use within spiral tube systems where a female connector is required
- External (female) coupler for connecting spiral duct fittings
- Part of the Stornch SpiraSafe range for reliable ducting solutions
- Designed to join fittings together where gaskets are not required
- Allows fittings to insert directly into the coupler
- Available in multiple diameters including 100mm, 125mm, 150mm, 200mm, and 250mm.
| Product Type | Ventialtion duct fittings |
| Product Code | External Coupler |
| Brand | Stornch |
| Available Sizes | 100mm, 125mm, 150mm, 200mm, and 250mm. |
| Uses | Suitable for high, medium and low pressure applications |
| Delivery Terms | ||
|---|---|---|
| Area | Order value | Delivery Charge (Ex VAT) |
| On select Postcodes (Around London, Manchester, Leeds, Bristol, York etc) | Orders Below £110 | £10 |
| On select Postcodes (Around London, Manchester, Leeds, Bristol etc) | Orders Above £110 | Free Delivery |
| On select Postcodes (Scotland, Swansea, Cornwall etc) | Any value | £25 |
Returns/Refunds And Cancellations:
You can cancel your order and get a full refund anytime before we confirm your order via email.
Orders cancelled after the order confirmation is sent, may attract a restocking fee.
If you want to return insulation that was ordered in excess or not of use anymore, you can return them within 14 days from the date of receipt, provided they are unused and in a resalable condition. Please contact us via email and we will assist you accordingly.
If the product is damaged, then you are within your rights to claim an exchange or a refund. For more information on returns and deliveries, please refer to our delivery information page.
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