22mm Concealed Single-Lever Shower Mixer with Diverter

22mm concealed single-lever shower mixer with diverter – Treemme – concealed single-lever shower mixer in stainless steel, with knurled handle: single, on a round rosette, or with a diverter for 2 or 3 outlets, on a rectangular plate or on separate rosettes. The plate and rosettes can be mounted vertically or horizontally.

The 22mm collection, designed by Marco Fagioli, Emanuel Gargano and Giampiero Castagnoli, is based on a 22 mm diameter stainless steel tube: curved pipes with clean lines and cylindrical knurled handles, with a fine texture that provides a secure grip even with wet hands. It is made entirely from AISI 316L stainless steel, satin-finished or in PVD colours.

What you receive: the external part (plate or rosettes, handle and diverter button), 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 – the visible part: handle, plate or rosettes, pipe, in the chosen finish;
• concealed body (code RWIT 22A2 ZZ 01 / RWIT 51A8 ZZ 03) – the part built into 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 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 11C8 .. 01 (without diverter, rosette), RWIT 11A2 / 11A3 .. 01 (vertical plate, 2 / 3 outlets), RWIT 11E2 / 11E3 .. 01 (horizontal plate, 2 / 3 outlets), RWIT 11C2 / 11C3 .. 01 (vertical rosettes, 2 / 3 outlets), RWIT 11F2 / 11F3 .. 01 (horizontal rosettes, 2 / 3 outlets)
• Concealed body codes: RWIT 51A8 ZZ 03 (without diverter), RWIT 22A2 ZZ 01 (with diverter, universal)
• Plate: 210 × 75 mm; rosettes: Ø 75 mm
• Flow rate: 18–24 l/min
• Installation: wall-mounted
• Collection: 22mm – designed by Marco Fagioli, Emanuel Gargano and Giampiero Castagnoli
• 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 do the knurled handles mean?

The 22mm cylindrical handles have a fine texture engraved in the steel, which makes them pleasant to touch and easy to turn even with wet hands or soapy hands.

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.

What do 2 or 3 outlets mean?

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

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 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 a finish, the IdeaCasa team is at your disposal – free consultation.