Manhole Covers & Rings Round Manhole Covers 5 ton galvanised, available in 460mm diameter and 320mm diameter. Square Manhole Covers Comes fully galvanised, available in 24″ x 24″, 18″ x 18″ and 12″ x 12″. PVC Manhole Covers 3.5 ton solid top, available in 450mm diameter or 450mm square. PVC Manhole Covers 3.5 ton solid top, available in 300mm diameter or 300mm square. Cast Iron Manhole Available in 600mm diameter. Manhole Rings Concrete manhole rings used for the sinking of wells. Sizes available are 1200mm x 900mm and 900mm x 900mm. Manhole Ring Covers Manhole ring covers. Sizes available are 1200mm and 900mm. Gully Grates Heavy duty 5 and 8 bar gully grates. CONTACT US BELOW FOR AN IMMEDIATE RESPONSE Product Range Enquiry: Your Name (required) Your Email (required) Subject Your Message