Factory-direct dry riser cabinets in the sizes UK installers order — 2-way and 4-way inlet cabinets, landing valve outlet cabinets, and the wet riser equivalents. Powder-coated RAL 3002 red or brushed stainless, 6 mm wired-glass door, slam lock keyed alike, concealed pivot hinges (stainless piano hinge on request). Built to the dimensions of BS 5041 Part 5 boxes; supplied empty for your breeching or valve, or as a set.
BS 9990 is the code of practice for dry and wet fire mains — it governs the installation, not the box. The cabinet itself sits under BS 5041, which specifies inlet breechings in Part 3 and the boxes for dry riser inlets in Part 5. We build cabinets to those dimensions and finishes. We do not hold LPCB or Kitemark certification and never claim it.
Design, installation, testing and maintenance of dry and wet fire mains. Sets where inlets and outlets go, and the signage on them. Compliance belongs to the installer and the system, not to a single component.
Part 1 covers landing valves, Part 3 inlet breechings, Part 5 the boxes for dry riser inlets. Our cabinets are made to the Part 5 box dimensions so a standard breeching drops straight in.
LPCB and Kitemark certification is normally held by the valve or the breeching, not by the enclosure, and it is voluntary rather than a legal requirement. We supply material certificates, ISO 9001 records and third-party EN 60529 enclosure test reports — and we do not claim approvals we do not hold.
The three sizes that cover most UK work, plus the wall apertures they need. All dimensions H × W × D in millimetres; every one can be built recessed or surface, in steel or stainless.
Same build, two sizes and two signs. The inlet cabinet sits at street level where the brigade connects; the outlet cabinet sits on each floor over the landing valve. Both shown here in RAL 3002 red with a Georgian wired glass door, slam lock and concealed pivot hinges; a stainless piano hinge is supplied where a specification calls for one.
595 × 395 × 295 mm, aperture 605 × 405 × 305 mm. Houses a 2-way inlet breeching for a 100 mm riser. Wired glass door so the breeching is visible without opening, slam lock keyed alike, concealed pivot hinges, drain hole and drip lip for external positions. Supplied empty for your certified breeching, or fitted.
630 × 460 × 275 mm, aperture 640 × 470 × 285 mm. Houses the landing valve on each floor, usually in the stair lobby. Identical build to the inlet cabinet, slightly wider and squarer, and the same box serves a wet riser — only the sign changes, to DRY RISER OUTLET, WET RISER OUTLET or PRV.
| Model | What it houses | Cabinet H × W × D (mm) | Wall aperture (mm) | Mounting | Door |
|---|---|---|---|---|---|
| DR-I2V | 2-way inlet breeching, 100 mm (4 in) riser — vertical | 595 × 395 × 295 | 605 × 405 × 305 | Recessed or surface | Wired-glass panel, slam lock |
| DR-I2H | The same 2-way inlet cabinet turned horizontal | 395 × 595 × 295 | 405 × 605 × 305 | Recessed or surface | Wired-glass panel, slam lock |
| DR-I4 | 4-way inlet breeching, 150 mm (6 in) riser | 595 × 595 × 295 | 605 × 605 × 305 | Recessed or surface | Wired-glass panel, slam lock |
| DR-O1 | Landing valve outlet, dry or wet riser | 630 × 460 × 275 | 640 × 470 × 285 | Recessed or surface | Wired-glass panel, slam lock |
| DR-F | Floor mounted inlet cabinet, where there is no wall to recess into | 595 × 395 × 295 on a plinth | — | Floor mounted | 16 SWG Zintec body, 5 mm chequer plate door |
| DR-D | Door and architrave only — 38 mm surrounding frame | 595 × 395 face (inlet) or 630 × 460 face (outlet), 80 deep | — | Over an existing opening | Wired glass or solid |
| Custom | Any breeching or valve arrangement | To your drawing, up to 3,000 mm | — | Recessed, surface or floor | Glazed, solid or louvred |
Outlet cabinets are the same size for dry riser and wet riser systems because the landing valve is the same. Depths of 275–295 mm are for recessed boxes; a surface architrave and door is far shallower. Send the breeching or valve model and we confirm the internal clearance before quoting.
| Feature | Standard specification | Options |
|---|---|---|
| Body | Zintec or cold-rolled steel, 1.2–1.5 mm | 0.8–2.0 mm to your spec; SUS 304 brushed stainless |
| Finish | Powder coating, RAL 3002 carmine red (the UK convention for fire mains) | RAL 3000 flame red, white, or bare brushed stainless |
| Glazing | 6 mm Georgian wired glass panel | Clear toughened glass, polycarbonate, or solid steel door |
| Lock | Slam lock keyed alike, concealed pivot hinges (stainless piano hinge on request) | Padlock hasp for a fire-brigade padlock, or a cylinder lock |
| Lettering | “DRY RISER INLET” or “DRY RISER OUTLET”, white on red | “WET RISER”, “FIRE MAIN”, “PRV”, or your own wording and logo |
| Weather protection | Gasketed door and drip lip on external inlet cabinets | Stainless fixings and 316 body for coastal sites |
Supplied empty as an enclosure, or fitted with an inlet breeching or landing valve sourced to your specification. We manufacture the cabinet; certified valves and breechings come from the maker you nominate.
Parts of a dry riser cabinet: body, door and frame, wired-glass panel, slam lock, concealed pivot hinges (piano hinge on request), drip lip, drain hole, fixing lugs, lettering. Replacement glass, locks and keys are supplied for our cabinets.
| Recessed | Body inside the wall, frame over the aperture. The aperture sizes above allow 5 mm each side; wall depth must clear the cabinet depth. |
| Surface | Full body on the wall face, no aperture needed. Used on plant-room walls, car park cores and retrofit work. |
| Door and architrave only | Where a builder’s opening already exists, a door and architrave set covers it — no box required. |
| Installation height | Inlet cabinets sit at fire-brigade working height as set by BS 9990 and the approving officer; outlet cabinets follow the stair-lobby detail on your drawings. |
Give us the wall build-up and we cut the frame to your finished-wall thickness. For external inlets we add a gasket and drip lip as standard.
Straight from the workshop capability sheet — the limits behind every size on this page. If a specification falls outside them we will tell you rather than quote it.
We supply installers, wholesalers and riser specialists on an OEM basis — your brand on the cabinet if you want it. Prices are factory FOB, quoted per model and quantity.
FOB pricing within 24 hours from your drawing, schedule or model list. Tiered by quantity; project schedules welcome.
Free OEM: your lettering, logo, colour and packaging with no tooling fee — the usual route for UK wholesalers.
One cabinet built to your drawing in about 7 working days. Sample cost is borne by the buyer and credited against the first order on request.
Material certificates, ISO 9001 quality records and third-party EN 60529 enclosure test reports with every order. No LPCB or Kitemark claim.
Assembled or knocked-down, in export cartons or crates with corner and glass protection.
Sea freight to Felixstowe, Southampton, London Gateway or your named port, FOB Xiamen.
Laser cutting, CNC bending, welding, powder coating, glazing and export packing across three production bases — the line that will build your riser cabinets.
Everything a specifier, contractor or building control submission needs. The UK standard-size drawing pack is online below — eight sheets as PDF plus the same drawings as AutoCAD DXF, free and with no sign-up. CAD blocks for plan layouts and Revit families are sent within one working day on request.
A 2-way inlet cabinet for a 100 mm riser is typically 595 × 395 × 295 mm, needing a 605 × 405 × 305 mm aperture. A 4-way inlet cabinet for a 150 mm riser is 595 × 595 × 295 mm. Both are made recessed or surface mounted, in steel or stainless.
The standard outlet or landing valve cabinet is 630 × 460 × 275 mm with a 640 × 470 × 285 mm aperture. Wet riser outlet cabinets are the same size, because the landing valve is the same — only the lettering changes.
The box is the same. A dry riser is empty until the fire brigade charges it through the inlet breeching; a wet riser is permanently charged and fed by a pump. Wet riser outlet cabinets often carry PRV lettering where the landing valve is pressure-reducing.
No. BS 9990 governs the installation and is the operative benchmark; LPCB and Kitemark certification is voluntary and is normally held by the inlet breeching or landing valve rather than the enclosure. Some specifications ask for it anyway — if yours does, we will say plainly that our cabinets are not LPCB certified so you can decide.
RAL 3002 carmine red is the UK convention for fire main cabinets — not the RAL 3000 flame red used on general fire equipment elsewhere — with a 6 mm Georgian wired glass panel and a slam lock keyed alike. We build to that as standard and to any other combination you specify.
We manufacture the cabinet. Most UK installers fit their own certified breeching or valve, so we ship the enclosure with the correct cut-outs. We can source and fit valves to your nominated make if you prefer a complete assembly.
Yes — free OEM. Your lettering, logo, colour and packaging with no tooling fee. That is how most of our UK volume ships.
Yes — the same boxes go to the Gulf, Malaysia and Singapore under the name breeching inlet cabinet, in 2-way and 4-way sizes to BS 5041 practice. See our breeching inlet cabinet page.
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