The galvanised Top Plate measures 15″ squared (375mm) and is used in conjunction with the Top Clamp and Top Insert Sleeve.
By cementing this plate in place at the top of the chimney stack, the flexible liner can be pulled through approximately 100mm and clamped in place. This will support the weight of the liner.
If you choose 4″ 100mm the hole will measure 111.76mm, if you choose 5″ 125mm the hole will measure 1456.05mm, if you choose 6″ 150mm the hole will measure 165.1mm, if you choose 7″ 175mm the hole will choose 193.04mm, if you choose 8″ 200mm the hole will measure 213.36mm.
