32mm waste pipe valve ?

With tiresome predictability there's a faint whiff from our kitchen sink again.
It will be because there is a flexible concertina type connector between
the middle half-bowl and the main bowl that manages to trap crud and presumably ferment over time - naturally above the trap. It has to be flexible because there's a height differential between the outlets.
Anyway last time I asked for advice someone suggested an inflatable bung to seal the pipe and then fill with something to leave overnight.
Returning to that theme, I find myself wondering if there exists some sort of valve I could fit to the outlet pipe (40mm) such that I could seal the pipe, add the bleach/whatever and leave it overnight.
A brief google suggests:
(Amazon.com product link shortened)
Which I can't help but feel isn't quite what I am seeking.
Once again, it's a question of names :)
Does such a thing as a valve for the 40mm waste outlet pipe of a kitchen sink exist ?
Thanks in advance :)
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After serious thinking Jethro_uk wrote :

Mine too and not that long since I did my trick with a bung and filling with bleach.
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On Saturday, 16 May 2020 13:16:01 UTC+1, snipped-for-privacy@googlegroups.com wrote:

What you need is a deep seal trap on the drain. Gas from the sewer is getting into your house. https://www.jlconline.com/how-to/plumbing/deep-traps_o
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harry pretended :

No it isn't getting in. Rather the problem is smell from the pipework above the trap/ below the sink - as confirmed by...
Putting bleach down the sink wastes (2x) doesn't fix it. Block the drain and fill pipes with bleach up to top of sink waste, leave to soak over-night and the smell is gone by morning.
I now keep a suitable pipe bung next to the pipe where it exits through the kitchen wall, ready for use.
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On 16/05/2020 12:49, Jethro_uk wrote:

Not sure a valve, if one exists, would be a good idea for an infrequent application such as this, not least because the overflow would be defeated. Why not use a piece of dowel (or a piece of almost anything cut to make a plug) with duct tape wrapped around it so that it can be pushed into the pipe? - don't forget the warning notice on the taps! Better still - re-plumb using rigid pipe (perhaps by going to the rear to gain space for a couple of 45deg elbows, and then returning).
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With some sinks a lot of evil smells come from the underside of the sink around the plughole - ie - stuff that doesn't even make it into the pipe, but merely creeps under the the sing and occupies the annular space between plug hole and larger diameter of trap fitting.
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On Sat, 16 May 2020 16:01:33 GMT, John wrote:

I had that a lot during summer '18. Now the sink, basin and bath don't have traps as I've replaced them with valves. This means that there's no water, apartfrom wetness, in the outlets and also any particles of food are washed out instead of festering. The valves are outside - they don't freeze closed as the ice doen't stick to the silicone valve. Mustn't use 'drain cleaners' and it's worth having the valves easily accessible just in case. https://www.toolstation.com/osma-hepvo-pp-waste-valve-wt/p98150 https://www.toolstation.com/osma-hepvo-pp-waste-valve-wt/p87210 https://www.toolstation.com/viva-magna-self-sealing-waste-valve/p82878 https://www.toolstation.com/viva-magna-self-sealing-waste-valve/p16545 https://www.toolstation.com/mcalpine-wash-hand-basin-self-closing-valve/p10705 https://www.toolstation.com/mcalpine-macvalve-1-self-closing-valve/p26058 https://www.toolstation.com/mcalpine-macvalve-2-self-closing-valve/p49408
I've one of each make but I don' (yet!) know if there's any difference in longevity etc.
--
Peter.
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On Sun, 17 May 2020 09:02:39 +0100, PeterC wrote:

The concertina joining pipe I got has a self-sealing valve in it (which is a posh phrase for a piece of shaped slicone). The problem is that crud is building up behind it, so still whiffing.
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On Sun, 17 May 2020 09:51:08 -0000 (UTC), Jethro_uk wrote:

Corrugated pipe is EVIL! Bad enough on a washing machine but on anything else it traps crud. Get rid of that first, otherwise you're wasting your time.
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