Can I connect this reducer to a metal waste trap?

[Boothus]

Hello,

I've got this reducer FloPlast Overflow Waste Reducer White 32mm - https://www.NoLinkingToThis/p/floplast-overflow-waste-reducer-white-32mm/99045

I can just about fit the 32mm end into a 32mm metal waste coming from a sink trap (something like this: Brushed Brass Bottle Trap | Basin Trap | Victorian Plumbing - https://www.victorianplumbing.co.uk/arezzo-brushed-brass-round-basin-bottle-trap?campaign=googlebase&gclid=Cj0KCQiAxc6PBhCEARIsAH8Hff1RTpdzUYazIUD7aKqQRfjoIvLMB6DPEBs1GTRdAlB1w22eduT9vngaAimUEALw_wcB&gclsrc=aw.ds)

I want to reduce this waste to 21.5mm where it goes into the wall, hence why I'm doing this. The adaptor says solvent weld or push fit. Obviously I can't solvent weld this to a brass pipe but considering putting a bit of fernox on and then straight into the brass pipe (I haven't dared shove one all the way in there as I'm pretty sure I'd never be able to get it out again it's that tight a fit).

I know it sounds cowboy but anyone have any experience doing this? Metal to PVC is always a pain but standard connectors are out of the question as none of the plastic should be on show.

Thanks

 

[ShaunCorbs]

What’s the waste for ?

 

[Boothus]

Sink waste. I know 21.5 is OF not for a sink but this is a tiny cloakroom sink that gets used once a day.

 

[Boothus]

Here’s a pic of the two parts

 

[snowhead]

On the assumption that it must be reduced, with no other way to do it, the reducer should be offset to the so all or as much as possible of the water drains from the horizontal pipe otherwise solids, skin and hair, will tend to settle before the reducer.

I m not sure if this particular one is internal so probably won't fit in the pipe

Solvent Weld Overflow Reducer

www.toolstation.com

 

[Boothus]

not sure what you mean by “offset”…?Reducer fits in the pipe (super tight) but can’t solvent weld and there’s no rubber gasket, hence my question as to whether it’s possible to get a seal on it, considering how tight the fit is.

 

[WC1]

Edit

No, if you were reducing 32 to 21.5 (which you shouldn't unless you like unblocking pipes) then if its metal to plastic a rubber reducer will work better than solvent.

Polypipe rubber reducer 32 x 21.5mm | Wolseley

Looking for a Polypipe Reducer WP73? Order from Wolseley today - free delivery or click and collect available nationwide.

www.wolseley.co.uk

But it'll never work properly because of the unavoidable "step" in the reducer - waste will get caught and the pipe will block.

It is possible to do but contravenes regs and you might well regret not having done it properly i.e enlarge the pipe all the way.

Oh, and warm water will soften the 21.5 "overflow" pipe

 

[Boothus]

Thanks. I've found a rubber one so will give that a go. Appreciate it's not what you want for a sink but clogging isn't as much of a concern as this sink barely gets used.