G 3/4" and BSPP 3/4"

[andy_g]

Could someone please tell me, do the above two designations refer to the one and same thing?

Many thanks

 

[Newboy]

Yes

http://www.ring-plug-thread-gages.com/PDChart/G-series-Fine-thread-data.html

 

[andy_g]

With my micrometer I measure the external diameter of a male BSPP 3/4" to be 26.5mm.

However I have another male and female connector, it purports to be 3/4", it is parallel, and it measures 25.7mm external diameter. As a result it is not compatible with the 3/4" BSPP (it is smaller). The suppliers of this connector have called it "ISO 228, standard 3/4" but I am not sure exactly what it is. All I know is that it is parallel and that my 3/4" BSPP is too large to fit in (it seems by 0.8mm).

Any idea what it might be?

 

[Newboy]

Who's the supplier and what is the connector designed for?

 

[Newboy]

I presume it's this?
//www.diynot.com/diy/posts/3562460/

 

[andy_g]

It is a 20" water filter housing, which has two ports, for input and output, both plastic, and there are two such housings interconnected with a male-male plastic connector, which is shown here

http://www.wiltec.de/naturewater-er...re=wiltec_english&___from_store=wiltec_german

and which I have measured with the micrometer to be 25.7mm rather than the BSPP which is 26.5mm.

The description is pants, this is not 3/4" anything, and is not 26.16mm, since I have measured to be 25.7mm.

 

[Newboy]

I'm running out of suggestions!

The only things I can think of is to take the piece you want to attach to a decent (independent) plumbers merchant and try everything they could suggest.

Failing that try a pool supplies merchant and see if they have anything which may fit - most pool fittings are plastic and can have a few size variations - the clue being the 'O' rings forming the seal rather than the thread

 

[andy_g]

Yes it is a parallel fitting so the seal is mostly made with the O ring. However there is no male connector with an external diameter of 25.7mm. I keep looking.