• The Manhole Cover & Access Cover Website for the UK Construction Industry & Worldwide

Double Seal Double Cover Recessed Airtight Seals

Locked, (7400 Series)

Application: Recessed tray with secondary inner cover for added resistance against the egrees of odours and to prvide against drainage back pressure. All units are airtight and virtually watertight. Ideal for basements where back pressure water drainage is an issue.

Construction: Comprises galvanised mild steel recessed cover and frame to enable concrete or floor finish infill. Solid steel base plate design prevents prior need fpr shuttering. Secondary inner cover for added resistance against the egress of odours and to provide against drainage back pressure. Keying in bars fitted inside recess. All trays manufactured locked with 4 galvanised steel screws as standard. When unlocked screw holes act as lifting eyes. All units are airtight and supplied double seal locked as standard.

Finish: Hot dipped galvanised to BS EN ISO 1461 as standard.

Manufacture: ISO9001 Quality system. F.A.C.T.A. (Fabricated Access Cover Trade Association) member.

Load Rating: F.A.C.T.A. Class AAA - 10 Tonne G.L.V.W. (Gross Laden Vehicle Weight). Full loading achieved infilled with Grade C25 concrete.

Optinal Extras: 

  • Allen key head security screws = suffix |AK
  • Ministry of Defence approved security screws = MHC suffix |MOD
  • Brass Edging = suffix |BE
  • Stainless Steel Edging = MHC suffix |SSE

​Ordering: Please state required MHC Order Code and any optional extras i.e. MHC-7425/BE = 600x600mm/with Brass Edge.

Product Code Clear Opening (mm) Over Frame (mm) Frame Depth (mm) Internal Tray Depth (mm)
+MHC-7422 300 x 300 410 x 410 80 45

300 x 300

410 x 410

80

45

+MHC-7423 450 x 450 560 x 560 80 45

450 x 450

560 x 560

80

45

+MHC-7424 600 x 450 710 x 560 80 45

600 x 450

710 x 560

80

45

+MHC-7425 600 x 600 710 x 710 80 45

600 x 600

710 x 710

80

45

+MHC-7426 750 x 450 860 x 560 100 45

750 x 450

860 x 560

100

45

+MHC-7427 750 x 600 860 x 710 100 45

750 x 600

860 x 710

100

45

+MHC-7428 750 x 750 860 x 860 100 45

750 x 750

860 x 860

100

45

+MHC-7429 900 x 450 1010 x 560 100 45

900 x 450

1010 x 560

100

45

+MHC-7430 900 x 600 1010 x 710 100 45

900 x 600

1010 x 710

100

45

+MHC-7431 900 x 750 1010 x 860 100 45

900 x 750

1010 x 860

100

45

+MHC-7432 900 x 900 1010 x 1010 100 45

900 x 900

1010 x 1010

100

45

+MHC-7433 1000 x 1000 1110 x 1110 100 45

1000 x 1000

1110 x 1110

100

45