[51]

Having trouble fixing a leak so need to confirm a thread size.
a bottom entry float valve

http://www.andyplumb.co.uk/product.a...19&prodID=7472

Is it 1/2 " bsp or metric?

Thanks.

Arthur

[Andrew Mawson]

"51" wrote in message
...
Having trouble fixing a leak so need to confirm a thread size.
a bottom entry float valve


http://www.andyplumb.co.uk/product.a...19&prodID=7472

Is it 1/2 " bsp or metric?

Thanks.

Arthur




Well whatever thread it is it's pressure rating is 'interesting' - to
quote "withstands pressures from 1.5 to PSI " - maybe 'PSI' is some
strange newfangled utterly horrendous pressure !

AWEM

[Frank Erskine]

On Thu, 21 Sep 2006 22:30:44 +0100, "51"
wrote:

a bottom entry float valve

Sounds a bit kinky...

:-)
--
Frank Erskine

[nightjar]

"51" wrote in message
...
Having trouble fixing a leak so need to confirm a thread size.
a bottom entry float valve

http://www.andyplumb.co.uk/product.a...19&prodID=7472

Is it 1/2 " bsp or metric?

BSP is an ISO standard thread, which makes it officially a metric thread.
Most domestic tank and cistern fittings use 3/4" BSP, which is just over 1"
OD. If the one on that valve is 1/2", the thread OD would be about 3/4".

Colin Bignell

[51]

"nightjar .uk.com" nightjar@insert my surname here wrote in message
...

"51" wrote in message
...
Having trouble fixing a leak so need to confirm a thread size.
a bottom entry float valve

http://www.andyplumb.co.uk/product.a...19&prodID=7472

Is it 1/2 " bsp or metric?

BSP is an ISO standard thread, which makes it officially a metric thread.
Most domestic tank and cistern fittings use 3/4" BSP, which is just over
1" OD. If the one on that valve is 1/2", the thread OD would be about
3/4".

Colin Bignell


Thanks, Colin.

[Matt]

On Fri, 22 Sep 2006 02:14:12 +0100, "nightjar" nightjar@insert my
surname here.uk.com wrote:


"51" wrote in message


Is it 1/2 " bsp or metric?

BSP is an ISO standard thread, which makes it officially a metric thread.

Are you *really* sure of that?


--

[Roger]

The message
from Matt contains these words:

Is it 1/2 " bsp or metric?

BSP is an ISO standard thread, which makes it officially a metric thread.

Are you *really* sure of that?

My now rather old reference states:

"British Standard pipe threads are recognised by ISO and are maintained
in the inch system with fractional designations for pipe joints."

The dimensions in the tables are metric apart from TPI.

--
Roger Chapman

[nightjar]

"Matt" wrote in message
...
On Fri, 22 Sep 2006 02:14:12 +0100, "nightjar" nightjar@insert my
surname here.uk.com wrote:


"51" wrote in message


Is it 1/2 " bsp or metric?

BSP is an ISO standard thread, which makes it officially a metric thread.

Are you *really* sure of that?

Under EU legislation, all threads we use must be metric, even if they have
to produce metric versions of threads that started out as imperial to
achieve that.

The relevant standards are ISO 228 and BS EN 10226

Colin Bignell

[Matt]

On Fri, 22 Sep 2006 17:09:59 +0100, Roger
wrote:

The message
from Matt contains these words:

Is it 1/2 " bsp or metric?

BSP is an ISO standard thread, which makes it officially a metric thread.

Are you *really* sure of that?

My now rather old reference states:

"British Standard pipe threads are recognised by ISO and are maintained
in the inch system with fractional designations for pipe joints."

The dimensions in the tables are metric apart from TPI.

Currently being nowhere near my usually easily accessible Zeus
tables/Kempes/Machinery's Handbook i'll take your word for it!

Bloody strange state of affairs when it has to be dimensioned in
metric though. Probably to suit the Germans/French who couldn't devise
a sensible thread if their life depended on it. PG threads used (or
not) for conduit/industrial switchgear are one of the most obscure.

They have a Metric OD (but ridiculously referenced so that PG 13.5 is
actually just over 20mm, not exactly 20mm mind as that would be far
too sensible - (20.4mm to be exact), 18tpi pitch which equals 1.41mm
yes 1.41mm, not 1.5mm as that might remotely make some sense and an 80
degree thread angle so they can't be cut using common off the shelf
tooling.

Why on earth would any sane person bother with PG crap when 20mm or
larger conduit holes can be punched for 1/10 Euro cent and use
standard conduit fittings that have been around for three decades?


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