No pressure from taps, Bought new taps and now no pressure! What's happened? 

Hi just fitted taps on my bathroom sink. Brought from ebay. They were rubbish could not stop it leaking. Then I found a pin hole in the side of the threaded feed connecter out the bottom of the tap. On closer inspection the pipe was rusty inside. Cheap ebay fail. Went to screw fix and got better ones all fixed now. Thanks for all your videos they gave me confidence to not give up. You saved me loads of money fixing stuff my self. Much appreciated.

I was seriously running out of things to try to solve my trickle hot water issue. Changing the old valves for gate valves is something that did not occur to me. Getting 5 times the pressure from my gravity fed tank system now. Thank you very much 👍

very good tip

Great video. These days it's hard to find a modern single hole kitchen mixer tap designed for mains cold but gravity hot (0.1bar). Some claim to work on 0.1 bar but if they have ceramic valves and flexible hoses then you may mot be happy with the flow rate.

I suspect the hot taps are deliberately restricted to reduce a risk of scalding. Health and safety again !

The cost of having a Salamander Pump fitted would bring a tear to a glass eye

Great advice wish I had seen this last week before fixing new taps looks like I am going to have to invest in a pump to get hot water flowing stronger my cold feed is off mains . My lads changing his bath next week I will let him know cheers

Al always good advice from you . Is there any make that does large bore taps ,they never tell you in any description. Only that it is suitable for low pressure I have a tank in the loft Cold feed goes to taps first Bath mixer is ok New grohe mixer tap has slow hot water Is it possible to change the cartridge for a better type With larger holes ,thanks.

I found this video helpful. I replaced my bathroom taps and flow was terrible. I'm not a plumber but after looking into it found the new taps recommended to me require 0.5bar but I reckon I get 0.2bar in the upstairs bathroom with my gravity feed system. Solved it by buying different taps.

Could you use a full bore 15mm valve aswell instead of a gate valve?

if you switch over the cold gravity to mains, you could have an expensive shower problem if its a mixer, id stick a pump on the hot, not that expensive

I think this is the most useful video yet. Lots of info and i like the diagram and explanation. I am learning each time. The kitchen was put in with deep worktops so the sink and tap is a few inches away from the outside wall. This great for turning the back nut on the tap under the sink but the flexi hoses are needed to fit into the copper piepe work on the back wall. I would prefer to fit the new tap I found (with copper tails) and then join them onto the back wall feed with a 15cm flexi. Is this advisable? Or am I going to need to learn solder copper pipe work? Thanks.

Had the same problem yesterday changing mixer sink taps. Gonna remove the isolation valves today and hope it solves the problem. Cheers.

Bet that has caught a few people out, I am just about to fit new bath and basin taps, I was going to use flexi pipes but have gone of the idea after one failed at work and flooded the place. So just wondering why did they used to fit cold water tanks rather than making them mains fed, seams a bit pointless.

I like that idea

Thanks for the video! We had our taps in the kitchen replaced - the cold water pressure is great and the hot water pressure is great in the rest of the bungalow, but very slow in the kitchen (it used to be much stronger). After watching this, I looked under the kitchen sink and can see that the feeder pipe for the hot water is a very narrow one - I think I can replace this with one that is the same width as the cold and we'll have the same pressure as before.

Should I fix flexi to taps or straight copper pipe to kitchen sink.... Just thinking about what u said ....."regarding BORE not being Big Enough "

Great video. What flow rate for a tap or pressure rating if you get my drift. Great vids tho.

Thanks; very informative!

Manufacturers sometimes state clearly whether their product is suitable for high, low or mixed pressure systems. This is not always made explicitly clear, especially if you have bought your mixer tap from an online retailer. Dual flow taps are made so that the water mixes in the spout and not the tap body. Even then, filling a bath is a "balancing act". You have to have the hot side fully open from tank/cylinder/low pressure feed and the cold side slightly open if fed from the mains. I've fitted bath (no dual flow) mixers where when both tap heads are fully open and only cold water (mains) comes out. Where the cold pressure is especially high, the cold has actually backfilled the cylinder, backfilled the storage tank and poured out through the warning/overflow pipe out the side of the house.

Hi there We have just had a new shower mixer fitted on the same connections as the old one and now the pressure is a lot lower despite the use of a pump.. the hose and head are fine as we have checked on our other shower over the bath which is absolutely fine Any ideas would be greatly appreciated!

I have got a combi boiler but the narrow bore still causes me problems, slow hot water flow in the kitchen taps but not in the bathroom taps

Wen we moved into our house the bath had gd pressure. I then changed the taps and has been low pressure ever since. I've tried loads of different taps and still the same. Any idea.?

Hi I’ve had a combo fitted and have low pressure on my hot taps the water leaves the boiler on a 15 mm and enters the bath at 22 mm is that the right setup ?

Sorry but replaced my basin taps in bathroom have a combi boiler hot water is slow cold is a dribble bath ok kitchen ok any ideas?

Hiya mate. I have tank hot and mains cold to a basin. I want a mixer tap, will the cold mains overpower the hot and backflow my water tank in the loft?

What’s a good pump to install?

Your good

use 15mm full bore valve simplez

how many 90s will slow water presure down

15mm Full bore isolator instead of a gate valve. More bends than elbow fittings, reducing pipe size will increase water velocity (increase flow rate) towards the tap (start with 22mm then reduce to 15mm then to 12/10mm conecting to tap (mixer tap usually come with tails & should be used). Tap could also be an issue either not designed for ur system or faulty inside. Either replace parts if possible or new tap, which will be easier.

Al did you do the drawings for the Dandy or Beano ? 😳