A floor drain is a small part of a bathroom, but it is one of the few that is expected to work every day for decades. If it is chosen badly, the result is slow drainage, odours or stained grates within a few months. In the UAE, high temperatures, hard water and intensive cleaning add to the challenge. Here is what to check before you specify or order.
1. Start with the body material
For most residential and hospitality bathrooms, stainless steel bodies and grates are the safest choice. They resist corrosion, tolerate cleaning chemicals and keep their appearance. For heavier commercial or plant-room areas, cast iron bodies with stainless steel or nickel bronze tops give extra strength. uPVC bodies are economical but should be paired with a quality grate.
2. Match the outlet to the pipework
Confirm the outlet diameter (typically 50, 75 or 110 mm) and whether the connection is vertical or horizontal. A mismatch on site usually means extra adaptors, more joints and more risk of leaks.
3. Do not skip the trap
In a hot climate, water seals evaporate quickly in rarely used rooms. Choose drains with a deep-seal or anti-evaporation trap, or a mechanical odour barrier, for guest bathrooms, service areas and villas that stay empty for part of the year.
4. Think about the waterproofing
The drain must connect properly to the waterproofing membrane. Look for a clamping ring or membrane flange, so the membrane is captured by the drain body rather than simply stopping at the edge of it.
5. Choose the grate for the space
- Round or square slotted grates for general bathrooms and service areas.
- Tile-insert tops where the drain should almost disappear into the floor finish.
- Heavy-duty grates for commercial kitchens and areas with trolleys.
6. Plan the floor falls
Even the best drain cannot collect water that never reaches it. A fall of around 1–2% towards the drain is normally recommended, and the drain should be placed where water naturally collects, not where it is simply convenient.
Which drain for which bathroom?
| Bathroom | Drain |
|---|---|
| Standard bathroom | Square stainless steel drain with odour trap – floor drain with lid or two-piece set |
| Walk-in shower | Linear shower drain – square grate or tile-insert |
| Premium or hotel bathroom | Tile-insert floor drain |
| Laundry or utility room | Hinged-cover drain for frequent cleaning |
Size and finish
A 100 mm drain suits most bathrooms; 150 or 200 mm suits larger wet areas. Matte is the standard finish, with mirror polish for premium rooms. In coastal villas, choose AISI 316 stainless steel.
Installation checklist
- Lay the floor to fall towards the drain.
- Bond the waterproofing membrane to the drain flange.
- Set the grate level with the finished tile.
- Fill the trap with water after installation.
Frequently asked questions
Do I need an odour trap?
Yes, especially in guest bathrooms and villas that stay empty, where water seals can dry out in the heat.
Can the floor drain be hidden?
Yes. A tile-insert drain takes the floor tile so only a slim stainless steel edge shows.
Should I choose SS 304 or SS 316 for a coastal villa?
SS 316. It resists the salty coastal air much better than SS 304.
Getting it right first time
Share your drawings or room schedule with our team and we will help you match the drain body, outlet, trap and grate to each area. See our range of floor drains and shower drains.
Related products: Tile-Insert Floor Drain · Floor Drain with Lid · Two-Piece Floor Drain Set · Linear Shower Drain – Square Grate