GROHEUniversal Rough-In Box (3 Outlets 1/2", 2 Inlets Below 1/2", Installation Depth 75-105 mm, Connection Unit in DR Brass, Pre-Mounted Flushing Plug, No Trim Set Included), 35600000

Awesome Quality and great price

Bought to replace an existing mixer tap that was in the stud wall behind my shower. Wanted something easy to plumb in and fix properly without messing with levels etc.Was installed in a few hours (once cut out the old broken unit). Existing pipework was easily adapted using additional speedfit connectors. Instructions were clear and very easy to follow.The only thing I would say, and no fault of the manufacturer: if you are installing a square face plate then any "off" lines will be *very very* obvious. So affix the facecover and faceplate then work out your alignment back from that. You are limited to 6 degree float by the internals when you put them in...So easy to fit! Had it done in a few hours (this is for replacing existing unit in a stud wall...from the shower side)1. Affix a backboard to screw the back to2. Plumb unit in and pressure test3. Affix unit to backboard, then use spirit level to get fore/aft tilt and left/right. Pack out behind screws with washers and tighten it all up.4. Fit the supporting faceplate and clips to lock in place at right depth5. Fit your wall board (i used a sheet of hardibacker) to the right depth for your tiles + adhesive depth5b: pressure test again (Im a diyer so paranoid about my plumbing6. Seal it all in with sanitary sealant7. Apply thin layer of tile adhesive around the unit cylinder then fix the latex sheath to get a really good seal.8. Tile, grout and seal etc. or whatever you want to put on top.9. Install your chosen control unit (I got the square thermostatic mixer... bad choice as my tiling isnt super square :D)Id buy this again if was doing another shower as was so easy to get the levels right... I had it done and

Very happy with this controller and it looks great and works very well but it’s a bit fiddly to assemble and set up and you need a thermometer to set the temperature at 38c. The instructions in the box are not easy to follow as they are all pictures with very little text so I used YouTube to find a video which made it much clearer. Assembling the two control knobs is very fiddly too.

Our plumber recommended this product and we are extremely pleased

This piece of equipment is so efficient but if your plumber needs any further info contact Grohe. A little intimidating when it arrived but makes sense when you consult documentation.

Used for my bathroom for a 3 way control, builder had no problem fitting and has worked well since

perfect pice of mixer always Grohe

great product , quick delivery