Leaking 15mm to 10mm internal reducer

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When you use these, you tighten till you feel a snap, that is the parts seperating, then you tighten more till tight, sounds like you are not snapping the fitting
It's not that type Ian. I thought it was at first, but it's a 3 piece type.
 
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When you use these, you tighten till you feel a snap, that is the parts seperating, then you tighten more till tight, sounds like you are not snapping the fitting

Oh, I'm definitely not hearing a snap! I thought that wasn't the case with this olive based fittings? Could you please help me understand which bit is supposed to snap?

*Edit, looks like Terryplumb has clarified
 
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It's not that type Ian. I thought it was at first, but it's a 3 piece type.
What am I missing mate , this is the OPs pic in his opening post, it is the one piece that snaps ? has he posted the wrong pic ?

reducer.jpg
 
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Oh, I'm definitely not hearing a snap! I thought that wasn't the case with this olive based fittings? Could you please help me understand which bit is supposed to snap?

*Edit, looks like Terryplumb has clarified
is this the reducers that you are using ?

reducer.jpg
 
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When they open up, it looks like this (see attached) Pretty much like a compression fitting but with reducers at either side.
sorry different fittings , you can get ones that come as a one piece complete and they have to be snapped inside the valve to seperate like your latest pic
 
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What am I missing mate , this is the OPs pic in his opening post, it is the one piece that snaps ? has he posted the wrong pic ?


Yes ,wrong pic . Just to see if we were paying attention:LOL::LOL::LOL:
 
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if you are fitting it like that, the marked piece is the wrong way round
 

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Yep, it's not fitted like that.
sometimes the existing rad 15mm nut is not compatible with those fittings, with that marked part the shroud should poke ot of the nut, some it doesnt post a pic of the made connections in particular where the pipe enters the valve
 
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Jeez... It's almost like GPs diagnosing and treating patients over phone in the new era of remote medical attention that has miraculously coincided with covid-19!
 
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It's a brass olive against 10mm copper, so you need to be really careful, dead easy to deform the copper pipe, once that's happened it will always leak.
I always use a wrap of gas tape as default with those reducers and then just nip it up.
 
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It's a brass olive against 10mm copper, so you need to be really careful, dead easy to deform the copper pipe, once that's happened it will always leak.
I always use a wrap of gas tape as default with those reducers and then just nip it up.

I made a note to change the olive to copper. Would that make a difference?
 
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Yep, both being copper then they compress at the same rates, so take less effort to create the seal. Brass is harder so needs a bit more to compress which can then deform the soft 10mm copper. Not as much an issue on half hard 15mm.

That's why most pro's will solder a 15mm to 10mm reducer onto the end of the 10mm, then it's native into the 15mm valve or use native 10mm valves
 

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