Having just replaced separate hot and cold bath taps with a mixer tap,
I'm finding that the flow rate has been reduced, almost as if the
mixer tap wasn't fully opening.   Presumably this is a symptom of a
defective tap rather than a "feature"?

"Deville"  wrote in message 
news:evd7i198v30eaktkfm3n45d2i0pkq13ji9@4ax.com...

> Having just replaced separate hot and cold bath taps with a mixer tap,
> I'm finding that the flow rate has been reduced, almost as if the
> mixer tap wasn't fully opening.   Presumably this is a symptom of a
> defective tap rather than a "feature"?


Could be a number of things.  Have you used flexis?  Their internal bore is 
a lot smaller than that of copper pipe and can reduce flow on sytstems where 
the pressure isn't very high.  It could be that the stopcock and/or 
isolators are not turned fully on ( I always turn stopcocks fully on and 
then 1/2 a turn back ).  It may be a mixer tap designed for high pressure 
systems and your system isn't.

HTH

John

On Sun, 11 Sep 2005 07:04:19 +0000 (UTC), "John"
 wrote:


>"Deville"  wrote in message 
>news:evd7i198v30eaktkfm3n45d2i0pkq13ji9@4ax.com...
>> Having just replaced separate hot and cold bath taps with a mixer tap,
>> I'm finding that the flow rate has been reduced, almost as if the
>> mixer tap wasn't fully opening.   Presumably this is a symptom of a
>> defective tap rather than a "feature"?
>
>Could be a number of things.  Have you used flexis?  Their internal bore is 
>a lot smaller than that of copper pipe and can reduce flow on sytstems where 
>the pressure isn't very high.


No, I simply replaced the existing taps with the mixer straight onto
the existing copper pipe.


>It could be that the stopcock and/or 
>isolators are not turned fully on ( I always turn stopcocks fully on and 
>then 1/2 a turn back ). 


I'm pretty sure they're fully open.  The inline stopcocks only turn
through 90 degrees.


> It may be a mixer tap designed for high pressure 
>systems and your system isn't.


Ah, I wasn't aware such things existed.  
The feed is a combi boiler in conjunction with an electric shower
pump.  

Thanks for the input.