water flow rates multiple use

[Stephen Bowman]

hi all. needing a bit of help please. I do new build properties and have a customer that will not accept a loss of flow rate when using multiple outlets, eg taps restricted flow rate 6 l/min is achieved but reduces to 5 l/min when using two outlets. what i need is the british standard and /or nhbc standards that set out regulation for using multipe outlets. any ideas ?. this is on a sn unvented santon plus instalation

 

[Chuck]

Not exactly what you asked for (my copies of British Standards are not to hand ATM) but Part G of the Building Regs specifies 6 l/min as the maximum allowed for taps supplying basins.

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/504207/BR_PDF_AD_G_2015_with_2016_amendments.pdf

You might find something in there that helps your case if you read it carefully.

 

[ShaunCorbs]

Install an 400l accumulator = no drop