Improve Hot Water Pressure (Whole House)

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I have a vented gravity hot water system with direct mains cold. Cold tank in loft. Hot cylinder in airing cupboard on first floor. Worcester Bosch 15ri boiler.


IMG_1316.jpg

The hot water is pressure throughout the whole house is pitiful.

It produces 1 litre of water in around 17 seconds and takes 1.5 minutes for hot to arrive at the furthest tap (kitchen / most used!).

All taps are monoblock / mixers - which I understand makes the hot water pressure worse with such systems as mine? - but the shower is electric and works well.

Can anyone suggest a suitable pump to fit to increase this? I called Stuart & Turner but they weren't particularly helpful.

Is it a DIY job or an expensive one for a plumber?

If I added such a pump then would it actually solve the problem or simply make things slightly better?

A further issue is that my youngest sleeps to the very left of the airing cupboard. Therefore, any pump / solution would need to be quiet enough not to wake him (current heating pump doesn't).

Obviously any alternative solutions or suggestiongs would be welcome.
 
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Mixer taps are not usually suitable for use on low pressure hot water systems.

I have two mixers, on my low pressure system. One on the upstairs w/basin, which I modified to improve the flow - besides it is close to the hot source. Plus a normal low pressure tap, fed via a temperature controlled mixer at the downstairs toilet w/basin, which works fine.

One way to get hot water out quicker, is to add a circulation pump and have it circulating water round a loop. That only gets the hot water coming at the tap quicker, makes no difference to the flow at all.
 
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I believe the pressure to be 0.3 bar. The tap I fitted recently allegedly worked off a pressure lower than this. It is no better than the non-mixer tap it replaced. Likewise the bath - the mixer replaced 2 single taps and is no better / worse (albeit was 5 years ago).

I will look into this as a solution though - are there any non-mixed yet mixer-style taps? I can't remove the taps I have and replace with two separate taps due to design of existing sinks etc.

I have also stumbled across this kind of solution;

The upstairs bathroom is copeable with. The kitchen tap isn't.

Perhaps an alternative - and just to get HW quicker to the kitchen - is something like this although I've no idea if they're feasible long term & would need to get electric to under the sink; https://rb.gy/h86wom
 
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I could look at full turn mixer tap presumably for the kitchen sink (current is quarter turn)? This may improve the situation?
 
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It will make a considerable difference.

Thanks. There's not much choice these days - Franke Rotaflow and a Swirl version seem to be the only types in Screwfix at least but I will widen my search.

Thank you for your help - I'll let you know how it works out if I change it.
 
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Thanks. There's not much choice these days - Franke Rotaflow and a Swirl version seem to be the only types in Screwfix at least but I will widen my search.

Thank you for your help - I'll let you know how it works out if I change it.

If it's any consolation, I fitted 1/4 turn ceramic taps long ago, before it became common knowledge that the would not work very well, with a low pressure system.
 
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