Plumbing Question - Shower not hot

[timhoward]

I just tried to take this in. Now I know nothing about plumbing but I assume a good plumber could do this in half an hour and rule out the shower? I could also check the pressure doing this?

A good plumber might have an even better idea, but from a logical stance checking the hot feed to the shower is the aim and that's one way it occurred to me to do it. Depending on the details of the plumbing and the presence of compression fittings or john guest push-fit fittings there may be even easier ways.
I'd go on your local Facebook free/swap group and ask for a recommendation of a good local plumber who can help diagnose a problem with a mixer shower.

 

[Mark Wright]

Thanks for all your help.

 

[loz2754]

Don't forget we have a plumbers forum next door

 

[brianmoooore]

What type of shower is this? Thermostatic bar type?

 

[LukeD]

lets use the example its a "IBOX" Mixer (Bloody fantastic and good value ) . Many fitters dont bother setting the mixer up correctly and tell customers "showers are not legally as hot as they use to be " etc etc . Even the Override setting button is worthless if the mixer itself has been set too low . Many mixers instructions clearly show exactly how to install and test using a Digital temp gauge etc .5 mins work and many cannot be bothered ..

 

[Mark Wright]

What type of shower is this? Thermostatic bar type?

Yep.

lets use the example its a "IBOX" Mixer (Bloody fantastic and good value ) . Many fitters dont bother setting the mixer up correctly and tell customers "showers are not legally as hot as they use to be " etc etc . Even the Override setting button is worthless if the mixer itself has been set too low . Many mixers instructions clearly show exactly how to install and test using a Digital temp gauge etc .5 mins work and many cannot be bothered ..

I've looked at the manual calibration section and taken the dial off etc and had it on Max and still not hot.

But again I know nothing about plumbing.

*But the previous shower worked at some point then didn't
* This is a new shower so should be a new cartridge valve.
*The sink a meter away get boiling hot.

I think at some point it's gonna have to come off the wall and just see without anthing connected does it get hot and then we know where we stand.

 

[brianmoooore]

Some bar showers have filters sandwiched inside the connections to the wall.
Did you turn the shaft of the temp setting end with the knob off?

 

[Mark Wright]

Some bar showers have filters sandwiched inside the connections to the wall.

Didn't know that but don't think I saw anything in the manual about it.

Did you turn the shaft of the temp setting end with the knob off?

The instructions you take it all off including the safety thing. Then connect the nob again and turn. I turned it to max.

 

[brianmoooore]

The safety stop and end stops are built into the knob. with the knob off, mark the shaft so that you know where it was, then turn the shaft whichever direction is hotter and see if that solves the problem.
If the knob was removed and put back in the wrong position, then the calibration (if the knob is marked in degrees) and the correct 'max' temp is lost.

 

[Mark Wright]

Thanks I've done all that it is on absolute max and its not hot. Thanks for the suggestion though.

 

[brianmoooore]

Did you turn the shaft further than it would go with the knob on?

 

[Mark Wright]

Here is the manual it seems pretty simple -unless i'm being totally dense I have turned it to the total maximum

 

[Mark Wright]

Suggested on the plumbing sister site isolate the cold water - Where would the cold only isolator be?
Just for testing.

 

[LukeD]

Suggested on the plumbing sister site isolate the cold water - Where would the cold only isolator be?
Just for testing.

THis ...test the temp of the hot water pipe before and after the mixer. Then if really different .Remove mixer and test flow of hot water . I hate these mixers with all my heart .For me its "ibox" or nothing

hansgrohe iBox 01800180 Universal Fitting Set 1/2 and 3/4 - https://www.plumb2u.com/PBSCProduct.asp?ItmID=28449893&AccID=122267&PGFLngID=1&gclid=Cj0KCQjw0tKiBhC6ARIsAAOXutkBbybNHcpq9ANEIeqJb2cL0y71t7LkCltRobB4O9eCWilzqJfKTUkaAiCxEALw%5FwcB&gad=1 They really are amazing and Ive used them in Bathrooms that cost a fortune .

 

[DPG]

Did you turn the shaft further than it would go with the knob on?

I was going to comment on this post, but I fear it would have been juvenile, so I'll refrain.