Doc M packs: key facts
- A Doc M pack is a product bundle, not a compliance certificate. Approved Document M Volume 2 sets out how the whole wheelchair-accessible toilet should work: room, door, fittings, positions and alarm.
- ADM Vol 2 para 5.10 says the minimum room dimensions and the arrangement of fittings should comply with Diagram 18, and the heights and arrangement with Diagram 19 (and Diagram 20 as appropriate). Check any pack against those diagrams, not just the label.
- The flush should be on the open or transfer side of the WC, whichever way the room is handed (ADM para 5.10(r)). That's why packs come in left-hand and right-hand versions.
- If the wall-side rail is at the minimum spacing from the wall, add a second drop-down rail on the wall side 320mm from the WC centre line. If the wall rail's centre line is 400mm from the WC centre line, no extra drop-down rail is needed (para 5.10(j) and (k)).
- Sanitary fittings and grab bars should contrast visually with the wall and floor finishes, and walls should contrast with floors (para 5.4(k)). White rails on white tiles fail this.
- An emergency assistance alarm is part of an ADM accessible toilet (para 5.10(m)). A kit in the box isn't an installed alarm: wiring is work for a competent electrician.
- Approved Documents apply in England. Wales, Scotland and Northern Ireland have their own building regulations and guidance, so check the rules where your building is.
What is a Doc M pack, and why do people buy one?
A Doc M pack is a set of matched fittings for a wheelchair-accessible unisex toilet, sold together so the WC, basin, tap and rails work as one layout. People buy them because it saves specifying a dozen separate items and reduces the risk of a missing rail or a flush on the wrong side.
"Doc M" is trade shorthand for Approved Document M, the government guidance on access to buildings in England. Volume 2 covers buildings other than dwellings, and paragraphs 5.8 to 5.10 describe the wheelchair-accessible unisex toilet most packs are designed for.
The guidance doesn't describe a "pack". It describes a room that lets a wheelchair user approach the WC, transfer from their chair (alone or with help), use the toilet, and wash and dry their hands while still seated. Suppliers bundle the fittings that make that possible, handed to suit the side the user transfers from. Packs are used in new builds, extensions and refits of existing accessible toilets. They're also used for a wheelchair-accessible cubicle inside a separate-sex washroom, which ADM says should have the same layout and fittings as the unisex toilet (para 5.14(f)).
What does a Doc M pack usually include?
Most packs include a WC pan and cistern, a seat, a lever flush, a small basin with a lever or automatic tap, a backrest, and a set of grab rails including at least one drop-down rail. Some add a second drop-down rail, a mirror, a shelf or an emergency alarm kit. Contents vary, so check the list line by line.
There's no official definition of a pack, so two with similar names can differ. Typical items, and what ADM says about each:
| Item | Usually in the pack? | What ADM Vol 2 says or what to check |
|---|---|---|
| WC pan and cistern (close-coupled, back-to-wall or concealed) | Yes | Key dimensions to BS EN 997:2012, so it takes a variable height seat riser (5.10(q)). |
| Toilet seat | Yes | Should contrast visually with its background (5.4(k)). |
| Flush lever or button | Yes | On the open or transfer side, irrespective of handing (5.10(r)). |
| Backrest | Often | Check its position against Diagram 19. |
| Basin (small "finger rinse" type) | Yes | Placed so the user can wash and dry hands while seated on the WC (5.8). |
| Tap | Yes | Automatic or operable with a closed fist, e.g. lever (5.4(a)). |
| Grab rails (horizontal and vertical) | Yes | Count them against Diagrams 18 and 19. |
| Drop-down rail (open side) | Yes | The rail on the open (transfer) side is a drop-down rail (5.8). |
| Second drop-down rail (wall side) | Sometimes | Depends on the wall-rail spacing (5.10(j), (k)): see below. |
| Basin rail, mirror, shelf, hook | Sometimes | Check which are included; positions are in ADM's diagrams. |
| Emergency assistance alarm kit | Sometimes | Required (5.10(m)), but a kit isn't an installed, tested alarm. |
| Fixings | Varies | Depend on your wall: see the buying checklist below. |
Usually bought separately: soap and drying, a sanitary bin, the door and ironmongery, lighting and heating. ADM also suggests considering a chemical sanitary waste disposal unit (5.9).
What doesn't a Doc M pack cover?
A pack doesn't give you the right room size, door, layout, alarm installation, heating position, lighting or finishes. Those come from the design and the installation, and they are where most accessible toilets fall short.
Before you order, make sure someone owns each of these:
- Room size and shape. ADM para 5.10(i) says the minimum overall dimensions and the arrangement of fittings should comply with Diagram 18. If the toilet is the only one in the building, para 5.10(e) says the width increases from 1.5m to 2m and it includes a standing height washbasin as well as the finger rinse basin next to the WC. A pack won't make a small room work.
- Transfer space. The space beside the WC used to transfer from a wheelchair needs to be kept clear to the back wall (5.8). The pack can't stop someone putting a bin or a radiator there.
- The door. Preferably outward opening with a horizontal closing bar inside (5.10(g)), a light-action privacy bolt, an emergency release, and limits on opening force if self-closing (5.4(d), (e)).
- Alarm installation. Visual and audible confirmation the call was received, a reset reachable from wheelchair and WC, a signal distinct from the fire alarm (5.4(h)), and an outside signal that helpers can see and hear (5.10(n)).
- Heating. Heat emitters should be screened or have exposed surfaces below 43°C (5.4(j)), and shouldn't restrict the wheelchair manoeuvring space or the transfer space (5.10(p)).
- Finishes and contrast (5.4(k)): see below.
- Location, travel distance and numbers. See disabled toilet regulations.
Left-hand or right-hand transfer: which Doc M pack do I need?
The handing describes which side of the WC the clear transfer space is on. Pick the version that puts the transfer space, drop-down rail and flush on the open side of your room. ADM also asks for a choice of handing between toilets, so the answer can change from floor to floor.
Some wheelchair users can only transfer from one side, so ADM wants a choice:
- In a multi-storey building, accessible toilets should be in a similar position on each floor and allow for right- and left-hand transfer on alternate floors (5.10(c)).
- Where there's more than one unisex toilet in a building that isn't multi-storey, there should be a choice of layouts suitable for left-hand and right-hand transfer (5.10(d)).
Working out the handing on site
- Find the open side. The WC usually sits in a corner (ADM Diagram 18). One side is against a wall; the other is the clear transfer space where a wheelchair pulls alongside.
- Check how your supplier names it. Suppliers don't all describe handing the same way (some name it by the side the user transfers from, some by the wall the WC sits against). Send the supplier a marked-up plan rather than just writing "LH" or "RH".
- Check the flush. Whatever the handing, the flush has to be on the open or transfer side (5.10(r)). If the pack's cistern puts it on the wall side, it's the wrong hand.
- Check neighbouring toilets and make this one the opposite hand where the layout allows.
On refits, don't replace every accessible WC with the same hand just because it's in stock: that removes the choice ADM asks for.
Which grab rails and drop-down rails should a Doc M pack have?
There should be a drop-down rail on the open side of the WC. On the wall side, ADM allows either a wall-mounted rail set with its centre line 400mm from the WC centre line, or a rail at the minimum spacing from the wall plus a second drop-down rail 320mm from the WC centre line. Other rails come from Diagrams 18 and 19.
ADM para 5.8 says some people need horizontal support rails to transfer, and a wall-mounted rail is thought to give a more rigid handhold, provided it's set far enough from the wall.
Option 1: wall-mounted horizontal rail with its centre line 400mm from the centre line of the WC. No additional drop-down rail needed.
Option 2: wall-mounted horizontal rail at the minimum spacing from the wall, plus an additional drop-down rail on the wall side at 320mm from the centre line of the WC.
Open side: a drop-down rail (para 5.8).
This is where packs differ most. A pack with one drop-down rail assumes Option 1. If boxing-in or a concealed cistern pushes your wall rail close to the wall, you need the second drop-down rail, so decide before you order. All other rail positions and heights (vertical rails, basin rail, door rail) are in ADM Diagrams 18 and 19: use the current GOV.UK PDF and mark them on the wall before fixing.
Does a Doc M pack need contrasting colours?
Yes, in effect. ADM para 5.4(k) says the surface finish of sanitary fittings and grab bars should contrast visually with the background wall and floor finishes, and walls should contrast with floors. Whether your pack achieves that depends on the colours you choose and the room they go into.
Contrast helps people with sight loss find the seat, rails and basin and judge where wall meets floor. It often goes wrong because two separate orders decide it: the pack and the finishes.
- Choose rail colours for your walls, not the other way round. Dark rails on pale walls, or pale rails on dark walls.
- Think about the seat. A white seat on a white pan against white tiles gives very little to see. Many packs offer a coloured seat. For the universal and single-sex toilets in Approved Document T, para 2.13(d) asks for the toilet seat to contrast with the sanitaryware it's seen against; it's sensible practice in an accessible toilet too.
- Don't forget the floor. Walls should contrast with floors (ADM 5.4(k)), and ADT 2.13(c) asks for contrast at floor to wall junctions.
- Check with samples against the real tile or paint, under the room's lighting.
ADM doesn't give a numerical contrast figure in section 5. If your designer is working to a measured method, ask them which one and record it.
What should I check before buying a Doc M pack?
Check the pack against ADM Diagrams 18 and 19, confirm the handing on a marked-up plan, list exactly what's included and what isn't, ask what fixings come with it and what the wall needs, and agree who installs it, wires the alarm and checks the finished room.
Questions to ask the supplier
- Diagrams: Which edition of Approved Document M is the pack designed to, and does the fitting layout match Diagrams 18 and 19 of the current (2015 with 2024 amendments) version?
- Contents: Exactly which rails are included, how many drop-down rails, and is there a backrest, basin rail, mirror and alarm kit?
- Handing: How do you define left-hand and right-hand? Can you confirm from our plan?
- WC pan: Does it meet the key dimensions of BS EN 997:2012 so it can take a variable height seat riser?
- Flush: Which side is the flush on for this handing, and is it a lever or a large push plate?
- Colours: Which rail and seat colours, and can we have samples?
- Boxing-in: If the cistern is concealed, how does that change the rail positions and pan projection?
Fixing kit and wall strength
Ask for the fixing instructions for each rail and what the wall needs behind it. On stud or plasterboard walls, backing (such as timber or a pattress) is far easier at first fix than after tiling. On refits, get the installer to confirm the wall can take the rails before you order.
Who does what
Agree in writing who owns the layout, door, plumbing, rail fixing, alarm wiring and testing, finishes and building control sign-off. Alarm wiring is electrical work for a competent electrician working to the wiring regulations (BS 7671).
What are the most common Doc M pack installation mistakes?
The usual problems are the wrong handing, the flush on the wall side, rails at the wrong heights or spacing, a missing second drop-down rail, things placed in the transfer space, alarm cords tied up out of reach, poor contrast and rails fixed to walls that can't take them.
Most are cheap to avoid at planning stage and expensive after tiling.
| Mistake | Why it matters | ADM reference |
|---|---|---|
| Wrong handing ordered, or every toilet the same hand | Users who transfer one way only may be shut out | 5.10(c), 5.10(d) |
| Flush on the wall side | Hard or impossible to reach from the transfer side | 5.10(r) |
| Wall rail too close to the wall with no second drop-down rail | The wall-side rail doesn't give enough support | 5.10(j), 5.10(k) |
| Bin, radiator, baby change unit or storage in the transfer space | Blocks the wheelchair from pulling alongside the WC | 5.8, 5.10(p), 5.5 (no baby changing in wheelchair-accessible unisex toilets) |
| Basin too far from the WC | Can't wash hands while seated | 5.8, Diagram 18 |
| Alarm pull cord tied up or cut short | Someone who has fallen can't reach it | 5.10(o): reachable from the WC and from the floor close to the WC |
| Alarm fitted but nobody can hear or see the outside signal | A call for help goes unanswered | 5.10(n) |
| White rails and seat on white tiles | Fittings are hard to see for people with sight loss | 5.4(k) |
| Inward-opening door that swings into the space | Eats turning space; can be blocked by someone who has fallen | 5.3, 5.10(g) |
| Rails fixed into plasterboard without backing | Rails can loosen or pull out under load | Supplier fixing instructions |
A quick handover check
- Sit where a wheelchair would be in the transfer space: is it clear to the back wall?
- From the WC, can you reach the flush, the tap, soap and drying, and the alarm cord?
- Pull the alarm cord. Does the outside signal work, can it be seen and heard, and can you reset it from the WC and from a wheelchair?
- Can you clearly pick out the seat, rails and basin? Measure and record rail positions against Diagrams 18 and 19.
Facilities teams should repeat the cord, rail and clear-space checks regularly: cords get tied up and bins moved long after sign-off.
Does a Doc M pack work in schools and older buildings?
Often, yes, but the room is usually the constraint. In existing buildings check the room size, door and wall construction before choosing a pack, and in schools think about who will use the toilet, supervision and whether you need more than one handing.
Refits go wrong when the pack is chosen before the room is checked. Before ordering:
- Measure the room and compare it with ADM Diagram 18. If it's smaller, talk to your designer and building control body about options before buying anything.
- Check the door: swing, emergency release and opening force (5.4(d), (e)).
- Check the soil pipe: it decides where the WC goes, and so the handing.
- Check the alarm: where it reports and who responds.
In schools, plan who responds to the alarm during the day and at evening lettings. Where pupils need more support with changing or hoisting, a standard accessible toilet may not be enough, and a Changing Places toilet or a hygiene room may be needed. For pupil toilets, see hand dryers for schools.
Related guides
Doc M packs: frequently asked questions
What is a Doc M pack?
A Doc M pack is a bundle of fittings for a wheelchair-accessible toilet designed around Approved Document M: usually a WC, seat, flush, basin, tap, backrest and grab rails including drop-down rails. It covers the fittings, not the room, door or alarm installation.
Does buying a Doc M pack make my toilet compliant?
Not on its own. Approved Document M looks at the whole room: its size, the door, where each fitting goes, the alarm, heating and visual contrast. Check the final design with building control or your designer.
What's the difference between a left-hand and right-hand Doc M pack?
The handing is about which side of the WC the clear transfer space is on. ADM says the flush should be on the open or transfer side whichever way the room is handed, so the pack is made in two versions. Suppliers name the handing differently, so send them a marked-up plan.
Do I need two drop-down rails?
It depends on the wall-side rail. ADM says that if the wall-side rail is at the minimum spacing from the wall, you add a second drop-down rail on the wall side 320mm from the WC centre line. If the wall rail's centre line is 400mm from the WC centre line, no extra drop-down rail is needed.
Is an alarm included in a Doc M pack?
Sometimes an alarm kit is included, but often it isn't. An emergency assistance alarm is part of an ADM accessible toilet, with a pull cord reachable from the WC and the floor, a reset reachable from the WC and wheelchair, and an outside signal people can see and hear. Wiring is work for a competent electrician.
Can I fit a Doc M pack in a small existing toilet?
Only if the room is large enough for the layout in ADM Diagram 18, with the transfer space clear. If the room is smaller, talk to your designer and building control body before buying, as the pack won't fix a lack of space.
Can a Doc M toilet also be used for baby changing?
ADM says wheelchair-accessible unisex toilets should not be used for baby changing. Provide baby changing elsewhere.
Who should install a Doc M pack?
A competent installer who sets out the fittings against ADM Diagrams 18 and 19, fixes rails to suitably prepared walls and coordinates with the electrician fitting the alarm.
Do Doc M packs apply in Scotland, Wales and Northern Ireland?
Approved Document M is guidance for England. Wales, Scotland and Northern Ireland have their own building regulations and guidance. Packs are sold UK-wide, but check what's required where your building is.
Sources
We checked the facts on this page against these sources on 11 November 2026: