making sure connections to grohe mono mixer are watertight

fevr · 7 Jun 2009

Hi,

I've just joined up after getting some excellent DIY tips here

We are looking to fit a wall tap mixer into a stud wall and want to make sure we get it right as it will be plastered up from both sides.

The mixer bit that will be hidden in the wall looks like it can be connected with flexi hose which we have. But how do we make sure it is watertight...

Do I just wrap PTFE tape around before screwing in or am I using the wrong connection by using flex hose?

the hot and cold 'holes' to screw into seems rather deep and the flexi hoses screw right in - I've even dropped in an olive but it does even get to that.

I've attached some images

[GALLERY=media, 12047][/GALLERY]
[GALLERY=media, 12048][/GALLERY] [GALLERY=media, 12049][/GALLERY]

Whitespirit66 · 7 Jun 2009

No, don't use the olive on the joint on the side of the mixer body. Its a 1/2" BSP fitting, not compression.

Wrap some plumbers PTFE tape 7 times approx CLOCKWISE (looking at the open end of the flexi) around the thread on the end of the flexi pipe. Screw it into the hole on side of the mixer by hand then tighten (don't over-tighten!) with a spanner.

The olive and nut you have are for the other end of the flexi to fit to the copper pipes.

P.S. Congrats on buying a qualty mixer. In the unlikely event of it going wrong, you can always buy spares for it. A wise purchase!

Steady · 7 Jun 2009

Listen!

You appear to have taken the nut and olive off the flexi and now you are going to just screw what's left into the female threads on the valve body.

If that is the case then you should not be attempting this job . You are using the wrong fitting to start with.

And your somewhat bizarre use of the olive tends to suggest you are out of your depth.

fevr · 8 Jun 2009

Thanks for the reply guys... Ok so I haven't got the right fitting what should I be using, or do I just wrap PTFE around the flexi end????

Let's face it this can't be rocket science and yes I only put the olive in to illustrate that I knew that this was something that looked wrong.

Your right Steady I don't want to be out of my depth..... in water pouring from this

seco services · 8 Jun 2009

fevr said:
Let's face it this can't be rocket science

yes your quite right its not rocket science.
thats why your still doing it

when you put that in the wall damed if i would use flexis.

fevr · 8 Jun 2009

thanks seco what do you use then?

I used compression joints so far to reroute the pipe but this is the last bit... I even asked some people in Wicks and they didn't even know what the fitting was.

See.

it could be rocket science after all

wcavanagh · 8 Jun 2009

Not sure if it helps, but our plumber installed a simular one for me, and he used these. Used a fibre washer too.

Untitled

wcavanagh
8 Jun 2009
1

seco services · 8 Jun 2009

thats a mi (male iron) fitting and don't require fibre washers.
just use ptfe or liquid ptfe.

Steady · 8 Jun 2009

I even asked some people in Wicks and they didn't even know what the fitting was.

Well,if the staff in Wickes don't know what hope have we got?

FFS!

seco services · 8 Jun 2009

Steady said:
I even asked some people in Wicks and they didn't even know what the fitting was.

Click to expand...

Well,if the staff in Wickes don't know what hope have we got?

FFS!

thats why they work in wickes next step from macdonalds.

RigidRaider · 9 Jun 2009

Use traditional rigid copper pipes with the correct fittings, using PTFE tape. They will help to position your valve when you come to fit the front plate and rings. Flush the pipework through before connecting the valve. Once it's all connected up, turn on the water and test it then give everything a good wiggle to make sure you've done your joints right.

I didn't and guess what happened? Oh well, at least we've got an access hatch now in the wall behind the valve, which we cover with a big calendar.

fevr · 11 Jun 2009

Thank you all, lot more to this plumbing milarky than I originally thought

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making sure connections to grohe mono mixer are watertight

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