Low flow rate from Grohe mixer taps

30 Nov 2012
Reaction score
United Kingdom
I recently installed a Grohe basin mixer tap (Eurodisc Cosmo) which Grohe advertise as suitable for low pressure systems. It only delivers 3.5litre/min at a head of 0.25 bar (2.5m). I've been in touch with Grohe and they confirm that this is the flow rate to be expected from their LP mixer taps. In my opinion this flow rate is not enough for normal use.

I've realised (too late!) that this flow rate is quite a bit lower than most other "low pressure" mixer taps on the market, for example:

Bristan Capri 6.1 l/min @ 0.2 bar
Roper Rhodes Fresh 6.85 l/min @ 0.2 bar
Ideal Standard Ceraplan SL 5.5 l/min @ 0.1 bar

For me, choosing Grohe was an expensive mistake, so I hope by posting this someone else may avoid the same problem!
Sponsored Links

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local