Solvent Weld Overflow Reducer 21.5 x 40mm

[john2k]

I bought the following Solvent Weld reducer that is supposed to allow me to solvent weld a 21.5mm overflow pipe to a 40mm connector:

http://www.toolstation.com/shop/Plumbing/d20/Overflow/sd2908/Solvent+Weld+Overflow+Reducer/p47692

The 40mm part goes into the 40mm fitting nice and snug. However, when I put my Flopast 21.5mm pipe in the hole for the 21.5mm reduced size, it seems to be very loose. So loose that it feels like a good millimetre or two gap around the entire circumference of the overflow pipe. This just doesn't seem normal. I have also got a Flopast 21.5mm to 40mm reducer from B&Q but that one seems to be pushfit only and doesnt fit solvent weld 40mm connectors.

Any advice? I would ideally like to use solvent weld connections.

 

[nortonj]

Never had a problem with the smaller stuff, but sometimes on 4inch pipe i use gap filling solvent cement when the fit is a little slack.

 

[polesapart]

Solvent weld overflow pipe OD does slightly vary with manufacturer, just enough to be enough to be annoying sometimes.

 

[rules&rulers]

Sometimes its best to use products from the same company then they should all fit together.
If the reducer (not a known brand,maybe a copy part import from china) from t-station costs 89p and a named brand (flowpast) costs £1.20 at plumb-ctr, £1.08 at screw-fix.you have to ask your self why the difference in price.
Anyway,gap filling cement comes to mind for minor size departure.

Good luck,

 

[john2k]

Does screwfix sell gap filling cement? Couldn't find anything like it. Is it applied the same way as normal solvent cement?

 

[nortonj]

Does screwfix sell gap filling cement? Couldn't find anything like it. Is it applied the same way as normal solvent cement?

Comes in like a toothpaste tube. Plumbcentre sell it. Think the brand i use is polypipe.

 

[rules&rulers]

screwfix dont sell that gap filling cement.

Maybe just solvent glue in your fitting (just to hold it in the fitting) then use a smear of silicone to fill the void.

Time to feed the horse

 

[Madrab]

If you can't get the gap fill, just cut a piece of the pipe slightly smaller than the depth of the fitting, cut it down one edge and wrap it around the end of the pipe and then glue it onto it, that should then be tight enough in the fitting to glue it all into place.