Kitchen hot water tap low pressure

Ella_fella

Currently have a gravity fed water system, asked a plumber to change the mixer taps in the kitchen. Bought taps suitable for a low pressure system. With the new tap the hot water seems incredibly slow compared with the old tap, it's literally half the rate of the cold tap. I measured the flow rates and the cold water tap comes out around 15 litres per min whilst the hot tap comes out around 7.5 litres per min. There's no kinks in any of the hoses which are brand new anyway. 
Is this an acceptable flow rate for this system or is there something wrong?

Cardew

I wouldn't say 7.5L/min is incredibly slow, many would be happy with such a flow. Do you need a high flow in the kitchen?

https://www.harwoodandassociates.co.uk/faqs/guidance-on-flow-rates-for-taps-showers-and-baths/

Flow Rates in Litres per minute (l/m) – Approximate.

Old style ¾” bath taps = 15 l/m

Old style ½” basin tap = 10 l/m

Modern ¾” bath mixer tap = 12 l/m

Modern monobloc basin mixer with 10-12mm connections = 4 to 5 l/m

Old style ½” kitchen tap = 12 l/m

Monobloc sink mixer = 8 l/m