You will probably have seen a StoneStream advert if you searched for my product so I thought it worthwhile for me to review their adverts.
UP to 2X increased water flow – Low water pressure (30 PSI) – 212% increase
So lets start with the claim that 30 PSI is low pressure.
30psi = 2 bars = 20 metres head.
A typical gravity system has a cold water tank such that the shower head on the top floor is 1 metre 0.1 bars.
The pressure 1 floor down is + 3 metres = 4 metres pressure.
The pressure 2 floors down is + 6 metres = 7 metres pressure.
The pressure 3 floors down is + 9 metres = 10 metres pressure.
The pressure 4 floors down is + 12 metres = 13 metres pressure.
The pressure 5 floors down is + 15 metres = 16 metres pressure.
The pressure 6 floors down is + 18 metres = 19 metres pressure.
The pressure 7 floors down is + 21 metres = 22 metres pressure.
Does anyone want to disagree with me when I think that 30 psi is anything other than high pressure. Since all the videos and reviews appear to be based on a water pressure x20 that of an upstairs gravity fed shower I am unconvinced. The standard test for a WrightChoice shower head can be performed with just 1 metre head not 20 metres head.