Tap Connections - Name of fitting?

[TheScullster]

Hi all

I have just taken delivery of a Hansgrohe monobloc basin mixer. This has braided flexibles pre-attached - the top end being recessed well up into the tap body (can't even see where it connects). The bottom end, which previously I've seen with a compression end to convert to copper, has a female nut end with sealing washer. A little bit like the female half of a tap connector IYSWIM.

Does anyone know what specific fitting this is supposed to connect to that will convert to 15mm copper?

TIA

Phil

[Lurch]

On Fri, 22 Jun 2007 13:33:46 +0100, "TheScullster" mused:

Just screw it onto the end of an isolating valve\compression coupler or similar.

[Roger Wareham]

Sounds like the continental standard 3/8" BSP connector. You can use a

15 mm to 12 mm compression adapter without the nut and olive on the 12 mm end. Check if the exposed end has a sharp edge and file or grind it off if it has or it will cut through the rubber washer when you tighten it up.

HTH,

Roger.

[Andy Hall]

If you look on their web site, Phil, they have detailed drawings of most of the taps and it should say there. Otherwise a call to their technical support works. I did that for a specific query and they were very good.

[Roger Mills]

I assume that the threads will be either 1/2" or 3/4" BSP [1] - so you'll need a fitting called '1/2" male iron [2] to 15mm compression' (or 3/4" as the case may be). Something like this

should do the trick.

[1] Note that BSP fittings are a fair bit larger than the nominal size - so a 3/4" thread is actually just over 1" (from memory) in diameter [2] Not sure why they're called 'iron' - they're actually made of brass, or similar

[TheScullster]

"Andy Hall" wrote

The web site is not the easiest to navigate, but finally found the data sheets. Very comprehensive information available, right down to CAD drawings. Connection size is 3/8" as Roger suggested - not sure whether it is likely to be BSP on a European fitting. Will have to hit the PMs to see what fittings suite.

Phil

[Andy Hall]

Yes, you do have to be persistent but it is all there.

[Roger]

The message from "TheScullster" contains these words:

Surely if theey give the thread ssize as 3/8" then it has to be BSP. BSP is recognised by ISO.

[TheScullster]

"Roger" wrote

Not necessarily, NPT is also common outside the US and UK.

Phil

[Roger]

The message from "TheScullster" contains these words:

But is it in use in Europe? I was under the impression that BSP was in common use throughout Europe as the European standard.

NPT didn't even cross my mind as I have never come across it before. It is however possible to distinguish between the 2 with relatively primitive measuring devices, at least for 3/8ths (I haven't checked other dimensions). 19 tpi rather than 18 tpi and about half a mm difference in outside diameter.

[Martin Bonner]

this

should do the trick.

I thought it was because they were for connecting to iron pipe (originally).

[TheScullster]

"Roger" wrote

My experience of threads is based on process plant rather than plumbing items and taps. This probably puts a different slant on things. Equipment suppliers we deal with regularly use NPT (possibly because they have an American influence or American customer base).

Phil