Kitchen spout popping off

[Annette Gillis]

Hi,
The spout on my kitchen tap shoots off when I turn the pressure up. It was leaking but I replaced all three O rings which stopped the leaks. I can’t see anyway to secure the spout once it is pushed into position.
Annette

 

[breplum]

Seems like possibly a touch thicker o ring. Pretty unusual, so don't feel neglected if nobody else answers, because it is a real rarity you have there.

 

[DFBonnett]

If that is what appears to be an aerator on the end, you might try unscrewing it to see if is clogged thus creating back pressure.

 

[Mitchell-DIY-Guy]

Seems like possibly a touch thicker o ring. Pretty unusual, so don't feel neglected if nobody else answers, because it is a real rarity you have there.

Does not look like American plumbing. Is it?

 

[MicEd69]

The top O-ring slot is a bit wider than the other two from what I can tell from the picture. Just guessing, but that slot may be for a round wire snap ring like below.

 

[Geofd]

The spout looks like a Gerber but the faucet handles look like delta but I could be way off