Pressurised hot water.

[Tommyplug]

We had a Bathroom, boiler and cylinder change 6 years ago. At the time the builder said he did put in a pressured cylinder as we need it for the new thermo taps, before it was finished I was working abroad and home was rented since.
I'm back in UK now, bath and shower thermo mixer is very slow, about 10minutes for bath and heat changes from hot to cold over a tiny 3mm movement and bathroom sink takes 2 minutes to get hot water, less than 2 metres 22mm pipe.
It is Telford copper clyinder, indirect grade 3, maximum pressure 3.5 bar and a tank in roof which fills when I have hot water. I think this is not pressured so can it be?

I look on line and can make a 10litre bucket in 18 seconds filled with outside tap water, my pipe is 3/4" black plastic.

 

[flameport]

It is Telford copper clyinder, indirect grade 3, maximum pressure 3.5 bar and a tank in roof which fills when I have hot water.

That is about as low pressure as you can get, clearly the builder did NOT fit a 'pressurised cylinder' although they were probably right about needing higher pressure for the taps you have got.

Are these mixer taps (with a single outlet) and is the cold water direct from the mains supply or from the tank in the roof?

 

[Tommyplug]

That is about as low pressure as you can get, clearly the builder did NOT fit a 'pressurised cylinder' although they were probably right about needing higher pressure for the taps you have got.

Are these mixer taps (with a single outlet) and is the cold water direct from the mains supply or from the tank in the roof?

Sink is main water for cold and fast but hot is slow, bath has 3 tap mixer for bath and shower and thermo mix. It is all off roof tank and very slow.
Kitchen is 1/4 ceramic mixer and works very good.
Estimate or invoice does not show pressure tank but he did say it is needed. I cannot speak with builder, he is dead now.