We've just had a new thermostatic shower supplied and fitted by a local company. We have a gravity fed system and our old thermostatic (Aqualisa) shower had an extremely good flow rate. We were informed in advance that the new shower would have a slightly reduced flow compared to our old shower due to new European regulations now applied to all thermostatic showers sold into the UK (intended to prevent scalding due to changes in water pressure). However, what we are experiencing is a very significant reduction in flow to the point that the new shower is virtually unusable. I believe the new shower is a Thermostatic Bar Valve (TMV2) shower (see photo below) and so I was wondering if anyone had any suggestions on what we can do. Is our only option to get a pump fitted? One thing I notice on the new shower is that there is only a quarter turn on the flow control (left hand knob) before it hits an end stop. There is also a button on the flow control and I would have thought that pressing this button (like pressing the button on the temperature control) would have allowed the flow control to be rotated further beyond a preset limit, however pressing this button does nothing at all. Any ideas what this button on the flow control is for and why a shower manufacturer would add a button that seemingly serves no purpose?
Any help or guidance much appreciated - many thanks.
Any help or guidance much appreciated - many thanks.