The Water Evolution T0.42VI, formerly referenced as T1.42V.I, is the standard first-fix internal body used with the compatible T1.42.E concealed wall control. It forms the hidden working section of the mixer and is installed inside the wall before tiling or the final wall finish is completed.

This internal body is designed for a one-outlet concealed mixer installation with a vertical outlet. The visible wall control is a separate external component, so the installer should confirm the complete combination before first fix and before the wall is closed.

What does this internal body do?
The concealed body connects to the hot and cold water supplies behind the wall and provides the internal mixing valve for the finished wall-mounted control. Once installed, the visible T1.42.E external control is fitted at second fix to complete the mixer.

The body itself is unfinished because it is concealed inside the wall. The decorative finish you see in the bathroom comes from the compatible external trim rather than from this first-fix component.

What is different about the T0.42VI?
The T0.42VI is the standard installation version. It is supplied with a conventional fixing plate and does not include the Water Evolution ISOBOX installation box.

This version is best suited to installations where the plumber is comfortable setting the concealed body directly in the required position during first fix. The position of the valve, wall depth and final finished surface should therefore be established accurately before the wall is closed and tiled.

Standard body or ISOBOX version?
There are two internal body options for this one-outlet vertical concealed mixer system:


T0.42VI – Standard concealed body with fixing plate. No ISOBOX installation box.
T0.42V.BI – The same one-outlet vertical concealed mixer arrangement supplied with the ISOBOX installation box.


Both bodies perform the same basic mixing function and both are compatible with the T1.42.E external wall control. The difference is the installation arrangement supplied around the concealed valve.

When should I choose the T0.42VI?
Choose the standard T0.42VI where the installer prefers a conventional concealed-body installation and does not require the ISOBOX housing. It is the more straightforward first-fix option and is suitable where the final valve position and wall build-up can be set accurately at installation stage.

Important installation note
This is a first-fix component and should be selected before the wall is closed. The internal body and external wall control must be matched by Water Evolution product code. The visible finish of the external control does not change which internal body is required.

Key Features

Standard first-fix concealed mixer body
Current reference T0.42VI
Former reference T1.42V.I
Designed for one-outlet concealed mixer installations
Vertical outlet configuration
Compatible with T1.42.E external wall control
Standard fixing plate arrangement
No ISOBOX installation box
Internal / concealed wall installation
Single lever mixer body
Brass construction
One outlet
One installation hole
Flow rate 20 L/min at 3 bar
ANQIP certified
Designed by Studio WE
External wall control sold separately unless included as part of a complete set


Product Info
Brand: Water Evolution

Collection: Flow

Product Type: Concealed Mixer Internal Body

Current Product Code: T0.42VI

Former Product Code: T1.42V.I

Version: Standard Body with Fixing Plate

Compatible External Control: T1.42.E

Outlet Configuration: 1 Vertical Outlet

Installation: Internal / Concealed

Mounting: Wall Mounted

Material: Brass

Lever Type: Single Lever Mixer

Installation Holes: 1

Flow Rate: 20 L/min at 3 Bar

Certification: ANQIP