Should this soil pipe have a durgo valve on top?

[Sard]

Hi all,

I am about to redo a cloakroom WC and discovered this small soil stack that the toilet and sink waste drains into. It looks like it has concrete on the top and I wanted to ask if this was normal? Should I be fitting a durgo valve on top? It's going to be permanently boxed in for a wall hung concealed toilet.

Also is there a bung or plug I can stick into the toilet pipe for when I pull out the toilet, to stop smells coming up?

Thanks in advance

 

[Exedon]

I think you will find that's a underground (orange) drain plug.
They are hollow and it's filled up with crap.
Are your drains correctly vented elsewhere?
If they are crack on, it's never great idea to permanently box in a air admittance valve anyway.

 

[Sard]

I think you will find that's a underground (orange) drain plug.
They are hollow and it's filled up with crap.
Are your drains correctly vented elsewhere?
If they are crack on, it's never great idea to permanently box in a air admittance valve anyway.

Thanks, it is a plug as I managed to pull it out. This soil stack is the lowest and only has this toilet and basin feeding in into it. My other soil stacks have durgos and terminate into the loft.

Any advice on what I can use to plug the toilet pipe with as shown in the second photo?

 

[Sard]

Any help with finding the right plug for toilet waste when I pull the toilet out?