Circular Gullies Circular Gullies are available with 375mm Ø, 450mm Ø trapped or un-trapped. Gulley Cover Slabs available on request 610x610x115mm, 375mm ope Circular Trapped Gulley Circular Untrapped Gulley The above Diagrams Shows Approximate Capacity only Would you like to talk to us about your requirements? Contact Us Download our Concrete brochure Download