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Geberit DuoFix WC Frame 1.12m Prewall w/ Sigma Cistern 12cm 111383005

Geberit DuoFix WC Frame 1.12m Prewall w/ Sigma Cistern 12cm 111383005

SKU: 1492

The Geberit Duofix Sigma WC Frame 1.12m is constructed using heavy-duty steel, then galvanised to give superb durability. It features a full height frame ideal for installation in stud walls, includes a top quality cistern with half and full flush options and offers tool-free maintenance. This frame is compatible with any of our Sigma Flush Plates.

Application Purpose


  • For drywall construction
  • For installation in part- or room-height pre-wall installations
  • For installation in room-height installation walls
  • For installation in part- or room-height Geberit Duofix system walls
  • For wall-hung WCs with connection dimensions in accordance with EN 33:2011
  • For wall-hung WCs with projection up to 62 cm
  • For floor constructions 0-20 cm




  • Self-supporting frame, powder-coated
  • Frame with 9 mm drilling holes for fastening in wood frame construction
  • Frame prepared for support brackets for WC ceramic appliances with small contact surfaces
  • Galvanised feet
  • Feet adjustable 0-20 cm
  • Non-slip leg supports
  • Rotatable foot plates
  • Foot plate depth suitable for installation in U-profiles UW 50 and UW75 and Geberit Duofix system rails
  • Connection bend can be mounted without tools at different depths, adjustable range 45 mm
  • Fastening for connection bend, sound-absorbing
  • Concealed cistern with front actuation
  • Concealed cistern fully insulated against condensation
  • Cistern fulfils standard requirements in accordance with EN 14055, Class II
  • Immediate post flush possible with factory setting
  • Tool-free installation and maintenance work on concealed cistern
  • Water supply connection on the rear or top centre
  • Protection cover box for service opening protects against moisture and dirt
  • Protection box for service opening can be cut to length
  • Equipped with conduit pipe for feed pipe for connection of Geberit AquaClean shower toilets
  • With fastening option for electrical connection


Technical Data


  • Flow Pressure: 0.1-10 bar
  • Maximum operating temperature (water): 25C
  • Flush Volume (Factory setting): 5.8 and 3 litres
  • Flush volume small (Adjustment range): 3-4 litres


Product Includes


  • Water supply connection Rp 1/2", compatible with MF, with integrated angle stop valve and hand wheel
  • Protection box for service opening
  • 2 Wall anchors
  • Connection set for WC, 90mm
  • Connection bend 90deg made of PE-HD, 90mm
  • Adaptor socket made of PE-HD, 90mm
  • 2 Protection plugs
  • Cup for flush volume reduction 4.0/2.6 litres
  • 2 Threaded rods M12
  • Fastening material

Important Information

  • Any boarding must be fixed tight up against the face of the Duofix frame and screwed directly to the frame
  • The cistern can be operated with used water (rainwater) provided it is passed through a filter system first
  • Flush valve features settings to enable either a 6 l and 3 l flush or a 4.5 l and 3 l flush. Note: must be used with pans designed for low volume flush


Geberit Guarantee


  • 1 Year Product Guarantee and 25 Years Spare Part Availability Guarantee

Address: Melbros House, Great Central Way, Rugby, Warwickshire, CV21 3XH.


Phone: 01788 866945



Mon - Fri: 7.30am - 5pm
​​Saturday: 7.30am - 1pm

Sundays: Closed

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