Q30 Concealed Single-Lever Mixer with Separate Control
🚚 Delivery in 0–6 weeks · Free consultation
Q30 concealed single-lever mixer with separate spout – Treemme – concealed single-lever mixer with a single outlet: the lever sits on a square plate, separate from the spout. It can be combined with the Q30 wall-mounted or ceiling-mounted spout for a washbasin, or with a shower set.
The Q30 collection features clean square lines and a slim, blade-like spout: a minimalist Italian design by Giampiero Castagnoli and Marco Pisati, created for modern bathrooms.
What you receive: the external part (plate and lever), in your chosen model and finish; the concealed body only if you choose the complete set. The spout is ordered separately.
External part or complete set?
This product is wall-mounted and has two parts:
- external part – the visible part: lever, plate or rosettes, spout, in your chosen finish;
- concealed body (code RWIT 51A8 ZZ 03) – the part installed inside the wall by the plumber. It is not visible and is the same for all finishes.
The product cannot be installed without the concealed body. From the Set menu, choose:
- External part only – if you already have a Treemme concealed body installed in the wall (for example, if you are replacing a mixer or the plumber has already installed it);
- Complete set with concealed body – for a new installation: you will receive everything you need.
Finishes
11 finishes, from classic chrome to matte black, matte white, gold and brushed rose gold. PVD finishes are highly resistant to scratches and limescale.

Technical specifications
- External part codes: RWIT 4BC5 .. 05 (washbasin, 75 × 92 mm), RWIT 4BC8 .. 01 (washbasin or shower, 75 × 100 mm)
- Concealed body code: RWIT 51A8 ZZ 03
- Flow rate: 5 l/min (washbasin), 24 l/min (shower)
- Installation: wall-mounted
- Collection: Q30 – design by Giampiero Castagnoli & Marco Pisati
- Material: brass, electroplated and PVD finishes
- Manufacturer: Treemme Rubinetterie, Asciano (Siena) – Made in Italy
Complete dimensions are shown in the technical drawing in the image gallery.
Frequently asked questions
Which model should I choose?
For a washbasin, choose “For washbasin”. If the mixer supplies a shower or you want a higher flow rate, choose “For washbasin or shower”.
Do I need the concealed body?
Yes, it is mandatory for a new installation. Choose “Complete set with concealed body”. The “External part only” option is only for those who already have a Treemme concealed body installed in the wall.
How is it installed?
Installation is carried out by a plumber. For concealed models, the body is installed inside the wall before tiling, and the external part is fitted at the end.
How long does delivery take?
Delivery to your country takes 0–6 weeks, depending on the finish.
For projects, technical data sheets or help choosing a finish, the IdeaCasa team is at your disposal – free consultation.
Import duties and taxes are paid by the customer on delivery.
Manufacturer: Rubinetterie 3M S.r.l. (Treemme), Via Enrico Mattei 10, 53041 Asciano (SI), Italy · export@rubinetterie3m.it