New taps, poor flow rate

[Ben-gee]

It’s not that they shouldn’t be sold, it’s just that people shouldn’t buy them if their water system is not suitable.
Using a decent plumber will avoid this.

 

[Harvest Fields]

I’d say they’re unsuitable for your system setup, what’s the minimum pressure stated they’ll work at?

There’s a positive. First responder and the correct answer and route.

 

[Harvest Fields]

This is what's specced in the manual.
View attachment 75826
Seems like they're not suitable the based on your and @snowhead replies.

@snowhead out of interest is there and easy way to calculate the approximate pressure coming from a CW loft tank and also from a HW cylinder? Would avoid me making this mistake again in future.

On a set up like this I only ever give the option of a 0.2 tap there are actually loads out there.

 

[fourtytwo]

Using a decent plumber will avoid this.

That's the problem I have been having, trying to find a "decent plumber" especially when moving out of area.
Of course i also suspect many of these taps have been fitted as a DIY job, my "new" house seems to have suffered 15 years of assorted botchery from the previous.