Order Helpline 01752 692 760

Ubbink OFT4 Bitumen Flat Roof Vent Terminal (Twin Wall) - 131mm Diameter

Product Code:
Est. Delivery: 3-5 Working Days
Shipping costs displayed in basket.
We can let you know when this product is back in stock.

This product is proving to be very popular and has unfortunately sold out.

Enter your email below and we'll notify you as soon as this product is back in stock:

Subject to stock availability, if products on a 24 hours service are ordered alongside products NOT on a 24 hours service, this may delay your whole order.

View Transport Policy

All delivery charges are included in the final shopping basket and are dependent on the products Scottish Highlands & the Islands where additional shipping charges will apply.

Please note that not all products will incur an additional delivery charge to the Scottish Highlands & the Islands – this is based on the costs from the manufacturer, distributor or courier providing shipping on our behalf. If your delivery address is in the Scottish Highlands and Islands, a member of our helpline team will contact you prior to processing your order should an additional delivery charge apply.

While we make every effort to ensure orders are delivered by the date required, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules.

Any variation to web delivery date given will be advised to you by email or telephone. If we are unable to make delivery because access is not possible, we reserve the right to make a failed delivery charge.

£48.91 Incl. VAT
Oops! Please select from the options


Suitable for a Bitumen roof covering, Ubbink’s OFT/4 flat roof vent/terminal can be used in soil and vent systems, and for natural (passive) or mechanical ventilation installations. The OFT/4 has a special low air resistance cowl - the pressure/airflow resistance is <1.0 Pascal at 225m3/h. The pipework above the roofline is twin walled and incorporates an integral condensation drain. The stack pipe has an integral collar and separate aluminium flange for use with both felt and asphalt.

The Ubbink OFT/4 range is available in five different flange types for different roof coverings, Asphalt, EPDM, Bitumen and PVC, to allow termination through a flat roof to ducting up to 166mm. The stack cap is fixed mechanically so that it is more secure when installed in extreme weathers, however this can be removed for servicing purposes.

Features & Benefits

  • Suitable for Bitumen roof covering
  • Easy removal for servicing purposes
  • Large free vent area
  • Low Pa resistance

Product Specifications

Material: Polyethylene/Aluminium

Weight: 2.3kg

Diameter: 131mm

Height Above Roof: 400mm

Flange Diameter: 490mm

Depth Below Roof: 350mm

Free Vent Area: 12000mm2

Pressure/Airflow Resistance: 1.0Pa


Diameter 131mm Material Bitumen


There are no product downloads to show.

Questions & Answers

There are currently no questions for this product.

Have a question about this product?


There are currently no reviews for this product

Products We Recommend


Product Enquiry Form

Ubbink OFT4 Bitumen Flat Roof Vent Terminal (Twin Wall) - 131mm Diameter

*Required Field

Would you like to empty your basket?

Yes No


It seems you are running an older version of Internet Explorer. Our site does not support these old browsers as they do not house the technology that allows our site to be safe and secure.

If you wish to access our site please either upgrade your browser or download an alternative.