GROHE frame install

[BotusBuild]

I'm going to document the frame install to help some others in the future, as I have found the lack of words of explanation on the instructions to be a hurdle.

By way of example, this, I think is the first bit you need to consider, and it hinges around the height of the waste pipe, 220 or 230mm

 

 

Combined with this, where Z comes from the above picture

 

And thise two picture come from this

 

If I didn't know better I'd say these instructions were designed not by a German!

 

In my case, I think my Z is 985mm as the waste need to be at 230mm.

 

Here goes ...

[BotusBuild]

Next pay attention to the following two little pictures ringed in red, as they signal the start of instructions for whether you attaching it direct to a wall, or into a frame. 

I'm attaching it to a piece of wooden joist which is screwed into an ICF wall. (Pictures later)

 

[BotusBuild]

This one's a humdinger 😀

Takes the Z figure (985 in my case), then measure W (800 from the table in the picture) FROM FINISHED FLOOR LEVEL!! See that dashed line. Look where it goes.

 

Finding the centre line of where your waste will be is easier if you're going vertical, a littl more difficult if you're going at 45 degrees 😀

 

The 175 figure is where you will be drilling holes for fixing the bottom of the frame, the 230 where the brackets for the top fastenings will be.

 

Take the time to get all these marked out correctly.  Remember the adage "Measure Twice ...."

 

I ringed X1 below, but that's wrong as my waste will be T 45 degrees so I'll be using X2, so a min of 165 and a max of 230 from the wall.

Edited May 22 by BotusBuild
Grammar and bolding

[BotusBuild]

"Measure twice...."  😀

[BotusBuild]

And more measuring.

 

Time to pick up a power tool !! Are your sure those measurements are correct??

[BotusBuild]

Following these steps

 

I added that piece of wood to the wall

 

Drilled the four holes, two on the floor, two in the wood (my "wall"), then fitted the frame

 

And made the adjustments to these parts to level make it vertical and tightened the nuts and inserted the little plastic lugs

 

Finally, attached the waste to the Y junction. Ready for these steps next

[Omnibuswoman]

Great work!! 

[Nickfromwales]

4 hours ago, Omnibuswoman said:

Great work!! 

We haven't seen what happens when he hits the flush button yet.  

[BotusBuild]

11 hours ago, Nickfromwales said:

We haven't seen what happens when he hits the flush button yet.

There's a flush button?

[Nickfromwales]

13 hours ago, BotusBuild said:

There's a flush button?

Could be more of a "self-destruct" button here lol, but give it a push anyways and see what happens; I am safely outside the blast radius  

[Onoff]

On 22/05/2026 at 13:48, BotusBuild said:

This one's a humdinger 😀

 

I found the Geberit instructions confusing initially. Helped watching some of their YouTube videos. Dare say Grohe have the same or if not then on their website.

[markharro]

Will need to bookmark this page- I have fitted a Geberit frame downstairs and thankfully managed not to balls it up! I have a Grohe frame to put in upstairs - bought it second hand so will need to hunt down the instructions online. There were really really useful videos for the Geberit frames which in no small measure allowed me as a numpty to fit it......I was hoping there would be similar for the Grohe.

 

This has reminded me I will also need to source some extra parts eg the waste and water supply pipes will have been cut down to suit the previous install...can anyone recommend good source of spares?

[BotusBuild]

My above next steps are on hold. Moving to the water feed and flush mechanism. There are 3 option for where the water will come in - L or R side, or R rear. I'll be using L, not shown in the photo of instructions. This means the float mechanism fits to the right, again not shown in the instructions.

   

 

For me, it looks like this:-

 

 

Edited May 25 by BotusBuild

[BotusBuild]

Next the cover, which for us is on the front, so the right hand side of this page to be followed.

Note the actual size of the screws in comparison to those in bottom pictures

 

And we're now here.

 

Also still trying to figure out the 10 parts circled, that I figure are something to do with the two threaded rods that will ultimately hold the pan. There are other parts that came with the pan that I think replace these parts.

 

 

A pause now, while I sort out replacing the plaster board that I had to remove to re-route the drain pipes (another thread exists about that)

Edited May 25 by BotusBuild

[BotusBuild]

Two weeks! What have you been doing man?!

1st, getting the PB and plaster reinstated, and adding a backboard:

2nd, selling a house 😀

 

Right, next set of Grohe instructions:

 covers multiple flushers

So, I only need a small subsection of the instructions, of which, the twiddling round of the button with the Grohe logo has been carried out

 

Next step is to cut back the plastic white rectangle in the first picture flush to the wall.

[BotusBuild]

Fitted: