Hot water pressure - combi boiler

[dddppp]

Could any body offer me some advice about the sort of hot water pressure I should be expecting?

I have a ferroli condensing combi boiler about a year old.
The cold mains supply is approximately 12 litres a minute, the hot water comes out about 5-6 litres a minute.
In the boiler spec it gives the hot water rates as follows:
Hot tap water supply change 25 degrees - 13.8 l/min
Hot tap water supply change 30 degrees - 11.5 l/min
Hot tap water supply change 35 degrees - 9.8 l/min
I dont have the temperaure up very high!
I've turned the boiler off and still only get 5-6 litres a minute cold water through the hot tap!
Is this normal, or does it sound like a poor flow to the boiler?

 

[nicknox]

If your cold water supply into your property is 12 lpm then that is very poor. Best get that checked out first by your local water company. You need to also check the incoming pressure from the mains as well as the flow rate.

 

[dddppp]

I believed the supply in to the house was low, but when I have checked Yorkshire Water website they say its normal.
They have an mp3 sound clip that explains how to check the flow rate and say 2 litres per 10 seconds is normal, and I get exactly 2 litres per 10 seconds (12 litres a minute)!

http://www.yorkshirewater.com/your-water-services/help-guides-and-advice.aspx

 

[swbjackson]

12l/min is not a good flow rate even if it is normal for Yorkshire Water. If that's all they can provide you need to look at some kind of booster set up to give decent flow rates. You can fit a complete booster package or a cistern in the roof space with a separate booster pump. Alternatively, if your mains pressure is good, you may be able to fit an accumulator.

 

[bengasman]

This is the flow from your kitchen tap, which is often only fed through a 10mm tube connection to the mains; hardly the same as 15mm or 22.
this test was not designed to check the supply capacity to he house, but to check if the system pressure meets the minimum mark.