is there a fitting to connect overflow pipe to w/m spigot on sink waste?

[WaterTight]

thanking you

 

[Millsy 82]

1 1/2- 3/4 reducer?

 

[hammers4spanner]

Check mcalpine waste catalogue, they use to do one fitting that connected to waste then connect trap to that.

 

[kirkgas]

Cut the spigot off a mcalpine washing machine nozzle right back where the 3/4" thread is, screw on a 3/4" x 22mm compression adaptor and fit the 19mm pipe into the 22mm end using either a green imperial to metric olive and some ptfe tape or with the 22mm olive and half a roll of ptfe tape

 

[plumber0808]

If there is room fit a mcalpine clamp on the waste pipe.

 

[chris watkins]

http://www.mcalpineplumbing.com/media/cat/92.pdf
As Kirkgas says cut back to BSP thread & use R6 or R6a or R7
How about a V33S-22 if waste allows in-between sink waste & trap.