Rain water drainage - Max allowable lenght of run without access

[paro]

Hi All - I've spent the weekend digging a trench and installing 25m of drainage pipe to take the water from the roof out to a ditch that runs along the edge of my property. Is there a max length that I need to factor in for rodding etc?  access can be gained from the ingress and egress points but I failed consider installing any rodding points along the way.

 

Is this going to be an issue or can a professional deal with that no issue?

 

Thanks, Paul

P.S. Apologies, I've posted this in the wrong place but don't seem to be able to move it. 

Edited August 3 by paro

[Mr Punter]

If it is rainwater nobody will care. 25m will be fine.

[paro]

I'll take that. Thanks.