28mm Concealed Control on Rosette, for Washbasin or Shower

28mm concealed mixer on rosette, for washbasin or shower – Treemme – concealed single-lever mixer on a Ø 75 mm round rosette, separate from the spout: combines with the 28mm wall-mounted spout for a washbasin or a shower hose, for a free-standing wall arrangement.

The 28mm collection, designed by Giampiero Castagnoli and Marco Pisati, is made from 28 mm stainless steel tubes joined at a right angle: a horizontally cut, angled pipe and a vertical cylinder that becomes the control itself. It is made entirely from AISI 316L stainless steel, satin-finished or in PVD colours.

What you receive: the external part (rosette and control), in the model and finish of your choice; the concealed body only if you choose the complete set.

External part or complete set?

This product is wall-mounted and has two parts:

• external part – what is visible: handle, plate or rosettes, spout, in the finish of your choice;
• concealed body (code RWIT 51A8 ZZ 03) – the part that is built into the wall by the plumber. It is not visible and is the same for all finishes.

Without the concealed body, the product cannot be installed. 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 tap or the plumber has already installed it);
• Complete set with concealed body – for a new installation: you receive everything you need.

Finishes

Satin stainless steel or one of the three PVD colours: gun metal, bronze and gold. PVD finishes are applied in a vacuum and are highly resistant to scratches and limescale.

Technical specifications

• External part codes: RWIT 3BC5 .. 10 / 20 (for washbasin), RWIT 3BC8 .. 01 / G1 (for washbasin or shower, high flow rate)
• Concealed body code: RWIT 51A8 ZZ 03
• Flow rate: 24 l/min
• Installation: wall-mounted
• Collection: 28mm – designed by Giampiero Castagnoli and Marco Pisati
• Material: AISI 316L stainless steel, satin-finished or with a PVD finish
• Manufacturer: Treemme Rubinetterie, Asciano (Siena) – Made in Italy

Complete dimensions are shown in the technical drawing in the image gallery.

Frequently asked questions

What does the “with pin” version mean?

The 28mm control is a rotating cylinder. The standard version has a smooth cylinder; the version with a pin has a small side pin to make it easier to operate. Both are shown in the photographs.

Why stainless steel?

AISI 316L stainless steel is the same steel used in the food and shipbuilding industries: it does not rust, does not release metals into the water and is resistant to limescale and cleaning products. PVD finishes are applied in a vacuum and are highly resistant to scratches.

Do I need the concealed body?

Yes, it is mandatory for a new installation. Choose “Complete set with concealed body”. The “External part only” version 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 built into the wall before tiling, and the external part is fitted at the end.

How long does delivery take?

Delivery throughout Romania takes 0–6 weeks, depending on the finish. The prices shown include VAT.

For projects, technical sheets or help choosing a finish, the IdeaCasa team is at your disposal – free consultation.