OH GOD SOMEONE HELP ME LOW HOT WATER PRESSURE

[shanetasha]

I Have just ripped out my old bathroom suite and renewed the piping like for like. when i installed the bath (changed the ends for taps so i took the feed from closer to the hot water tank but same pipes used) when i fitted the new taps (shower / bath mixer it stated Taps suitable for use on all water systems from 0.2 to 6.0 BAR ) the hot water pressure was very low cold was fine. things i have done.
1. changed the cold and hot flexi ( the hot flexi is 22mm)pipes and the cold came through the hot tap lovely but the hot trickled out of the cold tap.
2.checked the ariators and they are clear.
3 checked the hot water flow in the rest of the house and it is the same as it was its just the bath taps.
the tank is a elson diamond double feed indirect hot water tank
and the pump is a wilo gold 50...
if anyone has any ideas please help because i am goin insane with the wife nagging me to sort this out,......

 

[JohnD]

it stated Taps suitable for use on all water systems from 0.2 to 6.0 BAR

they often say that

Have you bought some really trendy, stylish Italian taps?

show us a pic

What size are the tails on the taps?

How high is the cold-water tank above the taps?

It also sounds like you have fitted a mixer tap where the cold is from the mains (high pressure) and the hot is from the tank (low pressure). If so, this is wrong and will never work properly.

 

[shanetasha]

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the tank is about 1 ft behind the taps and about 2metres above them.
i used the same pipes that where used for the original taps just closer to the tank thats all.
what are the tails (newbee or just thick)
and yes it is a mixer tap with a shower head on it.
the taps are these

Untitled

• shanetasha
• 21 Oct 2009
• 1

 

[shanetasha]

could it be an air blockage in the pump or the tank? as i have drained the tank a few times to change the piping

 

[JohnD]

the tails are the threaded parts that stick out of the bottom of the tap and you connect the pipe to

They might be as thick as a pencil, or your finger, or your thumb. Thumb is best.

(10mm, 15mm, 22mm or therabouts)

What's that about a pump?

 

[shanetasha]

the flexi hose is a 22mm both ends and the tails are about 2 " long

 

[JohnD]

how fat are the tails?

 

[shanetasha]

the 22mm flexi hose fits onto them so i would of thought 22mm

 

[shanetasha]

i read that you sometimes have to bleed your pumpwhen you empty you tank and wondered could this be the problem

 

[muggles]

Did you have a mixer tap before or was it just normal taps? Is your cold mains or tank fed?

 

[shanetasha]

i had normal taps before and the cold is mains fed

 

[JohnD]

I don't believe it is anything to do with the pump (what you have heard about is I think the Central Heating pump, which is not the case with your problem) or an air lock. It is the water supply. I have a mixer shower fed from a tank, which gives reasonable, but not impressive, pressure and flow. The tank is just over 10 metres above the shower (I have a tall house) which gives 1 bar of pressure . You will not get much from your low tank.

I think the problem is that
(1)your fashionable new taps have smaller waterways in than than the old-fashioned British taps you had before, so you get less flow through them, and
(2) you have mains-pressure cold and low-pressure hot, which never work correctly through a mixer tap.

If you are looking for a straightforward, effective, easy and economical solution to your proiblem, buy some ordinary British pillar taps and sell your mixers on Ebay

If you want a more complex and expensive solution, change your cold-water supply to the bathroom taps to a tank-fed (so it is balanced pressure), and add a Shower Pump to make them squirt more forecfully.


If you want a much more complex, expensive and lengthy solution, keep your fashionable taps and change your hot-water system to a Combi boiler or a pressurised cylinder

 

[muggles]

Basically what John's saying, and what I was kind of getting around to, is that you can't have unbalanced pressures on a mixer tap. The reason for this is that the high-pressure cold will stop the low-pressure hot running out of the tap, so you need to balance the pressures somehow. Incidentally your new setup is probably also in contravention of the water regulations as I am assuming you haven't fitted backflow protection to prevent hot water being drawn into the mains in the event of a mains failure...

 

[shanetasha]

ok johnd thanks for your help and we are gonna get some new taps and less hassle lol.. again many thanks.

no muggles i did`nt i just used the same setup for the piping as was there before just further along the pipe do i need to do something else then

 

[muggles]

New individual taps would solve all your problems nice and simply so do that as JD suggested