Difference in water pressure between two showers

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18 Jun 2007
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London
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United Kingdom
Hi, I have two showers which branch off the same 22mm hot and cold feeds, but the water pressure is quite different in the two showers. They are at the same height below the cold water tank, both have 22mm pipes all the way to the mixer, and are not far apart. The only difference I am aware of is that one tees off at a right-angle from the hot and cold feeds, whereas the other one is at the end of the feeds i.e. in a straight line. Is this likely to account for the difference in water pressure, and if so is there anything I can do about it? If not, I guess the problem is somewhere else e.g. with the mixer or a blockage in a pipe to the mixer. Thanks in advance, Andrew
 
Are they the same make and model of shower? Are you talking about when they are running together or at seperate times?
 
A Tee or 90` elbow is more restrictive than a swept bend.

Possible that the mixer has filters which are partially blocked.
 
Thanks for the replies. I am running them separately and they are both the same make of mixer, newly installed (although one is a bath mixer and the other is in a shower cubicle). Perhaps I need to open the mixer from the front if possible, and check that nothing is blocking it?
 
Ahh...they look pretty much the same to me (they are both Grohe "embedded in the wall" mixers) but I guess you are saying that the flow rate through the one with the bath diverter is going to be higher, at a given pressure? Maybe I should put a bath one in the shower cubicle as well..
 

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