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Default 22mm compression fittings: spanners required?

On Wed, 29 Apr 2009 18:16:00 GMT, "The Medway Handyman"
wrote:

I'd have called those water pump pliers.


That's what I call them too (rightly or wrongly). The pliers I have
now are useless; whenever I try to grip anything, the jaws slip open
to their widest setting. I guess it's time to buy a better make.
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Default 22mm compression fittings: spanners required?

On Wed, 29 Apr 2009 14:19:37 +0100, Grimly Curmudgeon
wrote:

Varies from maker to maker.


I'm surprised by this, since the pipes they fit are standard sizes, I
assumed the fittings would be standard sizes too.

If someone made a fitting bigger than necessary/other makes, it would
cost them more, so I can't see any manufacturer doing that. If a
fitting required a different spanner to most other fittings, surely
people would not buy the unusual sized fitting because of that
inconvenience?

That said, the nuts on my Horstmann 2-port valves seem to be one
millimetre bigger than those on any other 22mm fitting in my house.
The truly awful Monument spanner[*] that is supposed to fit 15mm and
22mm fittings at either end, will not fit the nuts on the valve.

BTW, what's all this about Stilsons being used on pipes. How do you/
why would you grip a pipe? Surely you want to grip the fitting?

Thanks,
Stephen.
[*] Screwfix code 82712, I find it too thin
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Default 22mm compression fittings: spanners required?

Stephen wrote:


BTW, what's all this about Stilsons being used on pipes. How do you/
why would you grip a pipe? Surely you want to grip the fitting?


If you're screwing a malleable iron fitting on a steel pipe you will
most certainly need to grip the pipe.

HTH
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Default 22mm compression fittings: spanners required?

Stephen wrote:
Hello,

What size spanners do you need for 22mm straight compression fittings?
The nuts are 32mm but what about the flange on the middle of the body?
I measured it with a vernier calliper and I think it was 28.5mm, which
seems an awkward size. Rounding that up to 29mm, I could not find any
29mm spanners anywhere. Would a 30mm spanner be too big or do you
"cheat" and use adjustable ones?

Thanks,
Stephen


Thats 1 & 1/8th inch, and ISTR thats a whitworth size.


NT
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Default 22mm compression fittings: spanners required?

On Wed, 29 Apr 2009 02:52:05 -0700, RubberBiker wrote:

I bought two of these:

http://www.screwfix.com/prods/38428/...table-Wrench-8

Having messed about with other tools, these are the biz for firmly
tightening compression fittings (even in awkward locations) without
tearing the corners off the fittings.

Opens to about 42mm IIRC.


Yup, Bahco's the biz



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Default 22mm compression fittings: spanners required?

In article ,
Stephen wrote:
Don't forget that compression fittings are BSP sized, therefore the
correct spanners will (or should be) imperial size.


I did wonder that when I measured 28.5mm but then I thought if the
pipe is metric, surely the fittings will be too; I was forgetting that
15 and 22 mm pipe are essentially 1/2 and 3/4 inch pipe.


15mm and 1/2" are quite close: 22mm and 3/4" ain't. But it's the threads
on compression fittings which are BSP - only the bore and olive sizes were
altered for metric tube.

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Default 22mm compression fittings: spanners required?

RubberBiker wrote:

I bought two of these:

http://www.screwfix.com/prods/38428/...ches/Wrenches/
Bahco-Ergo-Wide-Jaw-Adjustable-Wrench-8

Having messed about with other tools, these are the biz for firmly
tightening compression fittings (even in awkward locations) without
tearing the corners off the fittings.

Opens to about 42mm IIRC.


They're good, but these:

http://preview.tinyurl.com/coxrcc

Are my favourites from the Bahco range of adjustable spanners. They're
slimmer than most adjustables and the alligator jaw feature is a built
in pipe wrench which comes in handy often.
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Default 22mm compression fittings: spanners required?

Stephen wrote:

BTW, what's all this about Stilsons being used on pipes. How do you/
why would you grip a pipe? Surely you want to grip the fitting?


Pipe wrenches are used for threaded galvanised pipes. These are still
used in many areas. I've just installed an outside water supply which
used galvanised pipe.
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Default 22mm compression fittings: spanners required?

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember Stephen
saying something like:

Varies from maker to maker.


I'm surprised by this, since the pipes they fit are standard sizes, I
assumed the fittings would be standard sizes too.


Hah! It's plumbing we're talking about here. We should count ourselves
lucky that most compression nuts are a fairly standard size (note I said
'fairly', not consistently), so the centre hex portion of a joint is
whatever the maker wants it to be.


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Default 22mm compression fittings: spanners required?

Dave Plowman (News) wrote:
In article ,
Stephen wrote:
Don't forget that compression fittings are BSP sized, therefore the
correct spanners will (or should be) imperial size.


I did wonder that when I measured 28.5mm but then I thought if the
pipe is metric, surely the fittings will be too; I was forgetting that
15 and 22 mm pipe are essentially 1/2 and 3/4 inch pipe.


15mm and 1/2" are quite close:


Half inch is near enough to 12.5 mm. 2 1/2 mm smaller than 15 mm

22mm and 3/4" ain't.

3/4 inch is near enough to 19 mm. 3 mm smaller.

Dave
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Default 22mm compression fittings: spanners required?

In article ,
Dave wrote:
15mm and 1/2" are quite close:


Half inch is near enough to 12.5 mm. 2 1/2 mm smaller than 15 mm


22mm and 3/4" ain't.


3/4 inch is near enough to 19 mm. 3 mm smaller.


Metric sizes are the outside diameter of the tube whereas imperial is the
bore. And the wall thickness of imperial tube is usually greater than
metric. In other words few could identify 15mm against 1/2" without
measuring it - but you can between 22mm and 3/4"

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Default 22mm compression fittings: spanners required?

Stephen wrote:
On Wed, 29 Apr 2009 18:16:00 GMT, "The Medway Handyman"
wrote:

I'd have called those water pump pliers.


That's what I call them too (rightly or wrongly). The pliers I have
now are useless; whenever I try to grip anything, the jaws slip open
to their widest setting. I guess it's time to buy a better make.


I bought a set in Aldi (possibly Lidl) a couple of years ago. Stiltson
wrench, set of water pump ish pliers designed to do up compression wastes -
really useful and a pair of water pump pliers. The latter had one jaw going
through the other rather that laying on top - IYSWIM.

Anywho, never slips, best I've ever used & whole set cheap as chips.


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Dave - The Medway Handyman
www.medwayhandyman.co.uk


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