Clark Drain Aqua Knight double sealed and locked recessed manhole cover Product Group: Steel Recessed Covers Sub-Category: Light-Duty Sealed & Locking – AQUA KNIGHT Material Grade/s: Mild Steel to BS EN 1449:1991/EN 10025:2004, Galvanising to BS EN 1461:2009 Load Rating Classification: All versions 5 tonne (GPW) Applicable Standard(s): FACTA (clauses no. 7.0, 7.2, 7.2.1, 7.2.3 & 7.3.3) Load Test Data: 12.5kN held for 30 secs Features Suitable for high water-table areas Tapered frame for secure bedding Factory fitted (single) neoprene seal Water (to 1 metre head) and odour tight Multi-point locking screws Supplied with a pair of CLKS 776 lifting keys Approved and used by London Borough Councils Dimensions External Dimensions: 850 (L) x 850 (W) x 50 (H) Clear Opening: 750 (L) x 750 (W) x 43.5 (H)