Multi Donuts are cast-in devices designed to create clean, accurate penetrations for cast iron pipe risers through concrete slabs. The flanged base fastens securely to the formwork, holding the assembly firmly in position throughout the pour so the riser passes through the slab exactly where it was laid out.
Built to work with cast iron pipe and riser clamps, the Multi Donut provides a reliable, professional riser installation while eliminating costly core drilling after the concrete has cured. Available in 2", 3", and 4" diameters, they are suited to residential, commercial, and multi-unit high-rise projects.
Key Features:
Creates accurate cast iron riser penetrations through concrete slabs
Flanged base fastens securely to formwork
Holds position firmly during the pour
Designed for use with CI pipe and riser clamps
Eliminates post-pour core drilling
Available in 2", 3", and 4" diameters
Packed in contractor box quantities
What’s Included:
One box of Multi Donuts in your selected diameter. CI pipe and riser clamp are not included.
