blocked
unblock

Thanks.
My option: The pipe clogged. It needs to be cleaned up.

The pipe is clogged. It needs to be cleared.

Thanks, Tatiana and Oleg.
My mistake with IS again)

The pipe got clogged. It needs cleaning/to be cleaned.

https://www.screwfix.com/p/drain-unblocker-7-6m/11325
https://www.toolstation.com/drain-blast-unblocker/p93465
https://www.mrmuscleclean.com/en-au/products/bath/mr-muscle-drano-ultra-gel
...

'clean' и 'clear' тоже встречается

Ознакомилась, спасибо

Uly, thanks.