Water Fall Tap problem

[Karins Hubby]

I have just installed a waterfall spout on my bath. The cold water runs fine however the hot supply has been reduced to a dribble. I suspect in may be due to the reduction of supply from a 15MM pipe to the 12mm fitting in the tap. How can I increase the flow rate on the hot supply?

 

[fuzzy]

that smaller pipe wouldnt cause it to tripple

is there a blockage, the filter inside blocked? are other outlets ok?

 

[easyt]

Do the hot and cold have similar pressure? Is it a mixer or are they separate.

 

[Karins Hubby]

Pressue is definitely reduced on the hot side. The tap is a mixer. incidentally the smaller unit fitted to the washbasin at the same time works ok

 

[easyt]

If it is a mixer tap and the cold was mains pressure and the hot gravity fed that could cause a problem. If that is the case then what do the manufacturers instructions say?

I thoughtlessly bought a nice mixer tap for the sink when re-doing the bathroom. Then realised it wouldn't be suitable. I exchanged it for a similar style appearance that was.

 

[Karins Hubby]

The other outlets are ok and the unit does not have filters fitted.

 

[Karins Hubby]

thanks for replying
The tap is fed from a worster combi that is 4 years old. pressure at the boiler is 1 Bar. The pressure is good on all other outlets. When purchased suitability was confirmed by the supplier.

 

[mark hurry]

First thing you have to do is disconnect the hot feed to the taps,thats the only way to prove if its a flow problem or the taps.
open up the issolation valve and see what you get,the valve its self may be at fault. Also when you disconnect the hot,you may find a fillter built into the tap connector.
Hope this helps.