We had our drains blocked again twice in 2 months the who came out today was a sub contractor who advised us not to buy drain rods or the extended pipe for a power washer. he advised us to just call the water company and if you get a nice man he will clear for free. so are they really worth spending 20 quid on a set or should i do as he said and hope that we get a nice man and does it for us for free?