28mm Concealed Shower Mixer with 2- or 3-Outlet Diverter

28mm concealed shower mixer, with 2 or 3 outlets – Treemme – concealed single-lever shower mixer in stainless steel, with a diverter for 2 or 3 outlets: on a rectangular plate or on separate round rosettes, mounted vertically or horizontally. Plate options are available in satin stainless steel.

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 pipe and a vertical cylinder that becomes the control itself. It is made entirely from AISI 316L stainless steel, satin or in PVD colours.

What you receive: the external part (plate or rosettes, control and diverter), in the chosen model and finish; 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, pipe, in the chosen finish;
• concealed body (code RWIT 22A2 ZZ 01) – 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 the Treemme concealed body installed in the wall (for example, you are replacing a mixer or the plumber has already installed it);
• Complete set with concealed body – for a new installation: you receive everything that is necessary.

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 (plate, satin stainless steel only): RWIT 3BA2 / 3BA3 (vertical, 2 / 3 outlets), RWIT 3BE2 / 3BE3 (horizontal), suffix 01 or G1
• External part codes (rosettes): RWIT 3BC2 / 3BC3 (vertical, 2 / 3 outlets), RWIT 3BF2 / 3BF3 (horizontal), suffix 01 or G1
• Concealed body code: RWIT 22A2 ZZ 01 (universal)
• Flow rate: 18 l/min
• Installation: wall-mounted
• Collection: 28mm – design by Giampiero Castagnoli and Marco Pisati
• Material: AISI 316L stainless steel, satin or with 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 2 or 3 outlets mean?

The diverter sends water one by one to each outlet: for example, the shower spout and hand shower (2 outlets) or the spout, hand shower and side jets or bath spout (3 outlets). Choose the number of outlets from the menu.

What does the "with pin" option mean?

The 28mm control is a rotating cylinder. The standard option has a smooth cylinder; the pin option has a small side pin, to make it easier to operate. Both can be seen 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, for a new installation it is mandatory. Choose "Complete set with concealed body". The "External part only" option is only for those who already have the 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 installed at the end.

How long does delivery take?

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

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