Max allowed mains water pressure for a condensing combi boiler?

[Stephen H]

Hi all, I've measured my mains water pressure at various points of the
day and it varies between 3 to 4 bar.

IS that OK with a condensing combi boiler or should I fit a pressure
reducing valve?

Might also be useful as well when I connect the cold taps and toilets to
the cold main instead of the cold water tank....

Stephen.

[Scott M]

Stephen H wrote:

> Hi all, I've measured my mains water pressure at various points of the
> day and it varies between 3 to 4 bar.

Have a google for your model's manual/spec and see what it allows. 4 bar
isn't particularly high so, IMO, any device that can't cope with that
should have a PRV in it already!

> Might also be useful as well when I connect the cold taps and toilets to
> the cold main instead of the cold water tank....

Ugh. No wonder you think 4 bar's high!! You'll find it a lot nicer when
you get mains pressure at the taps, etc.

Scott

[PeterC]

My mains pressure can get to about 5 - 6 bar late at night and the Vaillant
has lived with it for about 12 years.
--
Peter.
The gods will stay away
whilst religions hold sway

[doctordrivel]

"Stephen H" <ilov...@pleasespamme.com> wrote in message
news:06udnYCw8PpyxJDS...@brightview.co.uk...

Check makers specs. Most go to 8 to 10 bar. Also check your taps. Many
don't like it over 4 to 6 bar. Make sure toilet has a high pressure valve as
well.

[Dave Liquorice]

On Wed, 11 Jan 2012 12:11:33 +0000, Scott M wrote:

> Ugh. No wonder you think 4 bar's high!! You'll find it a lot nicer when
> you get mains pressure at the taps, etc.

And wet feet and front as the water shoots out the tap so damn fast
it scoots around the basin and over the side or ina sink just bounces
out. Then of course the taps may well sing at sensible flow rates as
they are only open a fraction if a mm.

--
Cheers
Dave.

[Doctor Drivel]

"Dave Liquorice" <allsortsn...@howhill.co.uk> wrote in message
news:nyyfbegfubjuvyypb...@srv1.howhill.co.uk...

Put a 6 litres flow regulators on the hot and the cold they also are
isolators as well. http://www.bes.co.uk sell them.

Also put them on the toilets, basins and dishwaters etc. No need on baths
or showers.

These balance the hot and cold water system. The shower is not greatly
affected when the kitchen taps are turned on.

These are essential on main water systems. Bathroom changing knobhead
plumbers never put them on.

[Tim Watts]

I would have to agree here. The BES "regulators" (really restrictors) are
basically a slightly oversized ball valve which allow a small 1x1cm
cylindrical cartridge to be fitted. The cartridges are available in a
variety of nominal flow rates and do work well IME.

--
Tim Watts

[Doctor Drivel]

"Tim Watts" <tw+u...@dionic.net> wrote in message
news:erj9u8-...@squidward.local.dionic.net...

The valves are "regulators". If the cartridge says 6 litres, it gives 6
litres. Restrictors are different.

[thirty-six]

On Jan 11, 9:44 am, Stephen H <iloves...@pleasespamme.com> wrote:
> Hi all, I've measured my mains water pressure at various points of the
> day and it varies between 3 to 4 bar.
>
> IS that OK with a condensing combi boiler or should I fit a pressure
> reducing valve?

Yes and yes.

>
> Might also be useful as well when I connect the cold taps and toilets to
> the cold main instead of the cold water tank....

Yes, but if there is no problem with the cold water tank it'll
probably be better to leave the toilets connected to it so as to have
a water reserve and it keeps the toillet fill quiet, which is
significant for night time use.

[Doctor Drivel]

"thirty-six" <thirt...@live.co.uk> wrote in message
news:acddac77-ca62-4884...@f1g2000yqi.googlegroups.com...

Main pressure Torbeck valves are quiet enough, then put on the toilet a
combined isolator/flow regulator uisng a 6 litres catridge. Available from
http://www.bes.co.uk Then the tank can go.

[Dave Liquorice]

On Sat, 14 Jan 2012 17:26:13 -0800 (PST), thirty-six wrote:

> Yes, but if there is no problem with the cold water tank it'll
> probably be better to leave the toilets connected to it so as to have
> a water reserve and it keeps the toillet fill quiet, which is
> significant for night time use.

Torbeck, or similar equilibrium valves, are quiet even on mains
pressure, just fit the appropiate flow restrictor. Who still uses
slow, noisey, ball valves in loo cisterns?

--
Cheers
Dave.

[Jonathan]

On Jan 17, 9:28 am, "Dave Liquorice"

I would my modern ones are extremely noisy.

Jonathan

[gri...@gmail.com]

On Tue, 17 Jan 2012 09:28:24 +0000 (GMT), "Dave Liquorice"
<allsortsn...@howhill.co.uk> wrote:

> Who still uses
>slow, noisey, ball valves in loo cisterns?

Plenty of people - they're a third of the price.

[Stephen H]

is it possible to buy the flow restrictors on their own without
replacing the toilet cistern's innards when converting from cold water
tank to mains pressure?

[harry]

On Jan 17, 1:38 pm, grim...@gmail.com wrote:
> On Tue, 17 Jan 2012 09:28:24 +0000 (GMT), "Dave Liquorice"
>

> <allsortsnotthis...@howhill.co.uk> wrote:
> > Who still uses
> >slow, noisey, ball valves in loo cisterns?
>
> Plenty of people - they're a third of the price.

And not neccesarily noisy if a restrictor is fitted.
Also far more reliable.

[harry]

On Jan 17, 9:28 am, "Dave Liquorice"
<allsortsnotthis...@howhill.co.uk> wrote:

Torbeck are not equilibrium valves.
They are pilot operated valves.
A small valve uses water pressure to open a bigger one. Hence only a
small float is needed.

Equilibrium valves may be found in water tanks but usually on inlet
pipes of 3" or bigger.
http://en.wikipedia.org/wiki/Double_beat_valve

[harry]

Most float valves are supplied with high and low pressure jets. The
high pressure jet has a smaller hole. They were once brass but are now
almost always plastic.

High pressure can be converted to low by drilling the hole out bigger.

[Bob Eager]

On Tue, 17 Jan 2012 10:31:47 -0800, harry wrote:

> On Jan 17, 9:28 am, "Dave Liquorice" <allsortsnotthis...@howhill.co.uk>
> wrote:
>> On Sat, 14 Jan 2012 17:26:13 -0800 (PST), thirty-six wrote:
>> > Yes, but if there is no problem with the cold water tank it'll
>> > probably be better to leave the toilets connected to it so as to have
>> > a water reserve and it keeps the toillet fill quiet, which is
>> > significant for night time use.
>>
>> Torbeck, or similar equilibrium valves, are quiet even on mains
>> pressure, just fit the appropiate flow restrictor.  Who still uses
>> slow, noisey, ball valves in loo cisterns?
>>
>> --
>> Cheers
>> Dave.
>
> Torbeck are not equilibrium valves.

That would be why the manufacturer calls them equilibrium valves, then.

http://www.opella.co.uk/Resources/Tech_Spec_Torbeck_SE_B610.pdf


--
Use the BIG mirror service in the UK:
http://www.mirrorservice.org

*lightning protection* - a w_tom conductor

[harry]

> *lightning protection* - a w_tom conductor- Hide quoted text -
>
> - Show quoted text -

Nevertheless, not true.
See my link.

[gri...@gmail.com]

On Tue, 17 Jan 2012 10:27:00 -0800 (PST), harry <harol...@aol.com>
wrote:

Agreed.

>Also far more reliable.

Agreed. Many times I've fitted a replacement Torbeck only for the new
one to fail in two years. They don't seem to like chalky water much.

[harry]

On Jan 18, 4:38 pm, grim...@gmail.com wrote:
> On Tue, 17 Jan 2012 10:27:00 -0800 (PST), harry <haroldhr...@aol.com>

If you dissemble it, you will find the diaphragm has two tiny holes.
They often block with a bit of scale. Easy to fix but PITA.

[Dave Liquorice]

On Tue, 17 Jan 2012 17:38:17 +0000, Stephen H wrote:

> is it possible to buy the flow restrictors on their own without
> replacing the toilet cistern's innards when converting from cold water
> tank to mains pressure?

Ask Opella? I might have the same problem here if I switch some of
the cold supply from gravity to mains. I do know I have a pot of
restrictors somewhere as I saw them the other month but where that
somewhere is is another matter...


--
Cheers
Dave.