Connecting 22mm compression fitting to 1/2" copper

[Charlie_Powell]

Hi,
I (foolishly) bought a 22mm fitting a bypass for 22 mm compression with realising I my pipe is 1/2". Finding a way to attach it is proving challenging. I cant find any brass fittings that would suffice. I would need a threaded 22mm to 1/2" compression. So I am thinking out an alternative. Would a 22 mm to 22 mm solder ring to 15 mm pipe and the copper pipe to another solder ring. It seems really complicated. I wonder, would anyone else have any better ideas? I might see if I can return the fitting and get a 3/4" one instead.

 

[Hugh Jaleak]

What, exactly, are you trying to achieve?

 

[Charlie_Powell]

I am installing an automatic bypass on my sealed system

 

[denso13]

Two of these, https://www.toolstation.com/made4trade-compression-reducer/p21910

 

[conny]

So you want to go from 22mm down to 15mm? 1/2" is imperial measurement, whereas modern pipes are metric, ergo 1/2" roughly equals 15mm but there is a slight difference.

 

[terryplumb]

Or a 22mm to 15mm compression reducing coupler ,as Screwfix code 68500

 

[Charlie_Powell]

So you want to go from 22mm down to 15mm? 1/2" is imperial measurement, whereas modern pipes are metric, ergo 1/2" roughly equals 15mm but there is a slight difference.

Thanks. Yes but here in Ireland we still use 1/2.

 

[Charlie_Powell]

Two of these, https://www.toolstation.com/made4trade-compression-reducer/p21910

Looks great. Apperently 15mm compression works fine with our 1/2" copper size. Cheers

 

[denso13]

Apperently 15mm compression works fine with our 1/2" copper size

Yes, same here, very little difference.

 

[Charlie_Powell]

Hi,
An update:
I tried a Flomasta Compression Reducing Internal Coupler 22 x 15mm (73748) but the fixing screw part wont fit over the reducer as you might see in the picture. Seems I will have to try another model. I dont quite understand why it is not fitting.

 

[terryplumb]

Show us a picture of the component parts of the reducer.

 

[Charlie_Powell]

It is a one piece reducer.

 

[terryplumb]

So the 22mm end of the reducer does not go fully into the valve ,doesn't insert at all in fact ?
Is the valve made for 22mm pipe ,or 3/4 inch ?

 

[Charlie_Powell]

So the 22mm end of the reducer does not go fully into the valve ,doesn't insert at all in fact ?
Is the valve made for 22mm pipe ,or 3/4 inch ?

It only sits inside it about 2mm. I am bewildered. The reducer seems to be a bit more than 23mm at one of the bands. It is a Myson Abv22 Straight Auto Bypass Valve. Labelled as 22mm online.

 

[denso13]

Much better with a three piece one than one piece. Something not right, they should fit any 22mm compression fitting.