UNBLOCK ME TIMES THREE

Surely that is an impossible thing to do 
How to go about it I'm sorry I haven't a clue
Time to call an expert as I ponder and think 
There must be a way to unblock my sink 

That can't be done I'm willing to wage a bet
Laid down a challenge the rules have been set
Surely that is an impossible thing to do 
How do I wonder attempt to unblock my loo 

Things comes in threes so I will say it again 
This time I need help unblocking my drain 
I fear that I will become a laughing stock 
So many things needed to help unblock