Low pressure taps

[rocketmanbkk]

Hi friends

So, here we go again!

Thought I'd ask the pro's now.

Changed bath taps and now pressure is rubbish.

It's a gravity fed system and new taps are mixer with shower attach, previous were pillar taps about 40yo.

Same happened in my mums house and I've been asked by others what can be done.

So, what's the issue?

Low pressure taps - what's the deal/difference?

No one wants a pump.

Before both hot & cold what good pressure. Now not.

I need an answer and solution. I want to sort for custards and in the future not have this happen.

So, over to you!! Any ideas? (Please).

Rct

 

[Chalked]

The only difference from a low pressure tap and standard . (6litres per min) is larger flexi's and a non airating spout.

 

[rocketmanbkk]

So why when you change old pillar taps to these modern mixers with shower attach does the water lose a the pressure? As an example, my mothers bath takes 20 mins to fill. Before it was 5 mins max!

Very frustrating

 

[AWheating]

modern taps tend to have smaller waterways so the flow rates through them are less, pressure is not effected, the pressure is the same as the tank to tap height is the same.

Always best to check the min pressure and flow rates of the tap when the system is gravity.

taps that have a form of flow limitation normally need a min 1bar supply.

 

[rocketmanbkk]

Thanks, yes, agreed pressure would be the same but the flow rate is useless.

Any recommendations on what bath taps (mixer) still provide good flow rates?

 

[townfanjon]

try keep away from ceramic disc taps. Trouble is most taps these days are ceramic disc, the customer buys the tap for its look

 

[rocketmanbkk]

Yeah, custard buys, I fit, they complain, I have no answer!!

I'd really like to sort out my mums tap though, she needs a mixer now as she's 81 and can't put on/off the old fashioned hair washer.

Her old council pillar taps were good!

 

[AWheating]

if you go onto manufacturers website you can checkout the flow rates and min pressures of the taps on the data sheets.

for example the trinity bath filler has a good flow rate at 0.2bar
http://www.bristan.com/WebRoot/BristanNewDB/Shops/Bristan/Products/WEB_DATA-1062479-1-D2-1.PDF

 

[townfanjon]

just point out the problem before they buy them, then if they do its their fault. You have done your job. Keep looking for some 'screwdown' type taps for your mum, I am sure there's some out there

 

[rocketmanbkk]

So basically, look for something 0.2 bar - 7/8 bar and flow should not change (much)?

 

[townfanjon]

TBH i have never noticed screwdown taps with a pressure/flow rateing, they will no doubt, but the ceramic disc wll always be around 0.1/0.2.
Any tap that screws rather than quater turns will do.

 

[rocketmanbkk]

Thanks for that. I'll look out for some.