[Iain macdonald]

I cleaned driveway last week that ran down into one small main drain there say it's not draining right am going try just blasting it with my Lance clear it if that don't work can I buy the proper jetting zozzles to put end my hose to clear it. It's not completely blocked as water still flowing just slower then normally would

[Smurf]

Just tell em it's not your problem as if you don't know what you are doing could do more damage than good. lol

[Charlie Allen]

Roll up your sleeve and stick your arm down it( about 18" to the bottom) clear out all the sand and debris you let go down it . Then  stick a lance down there and give it a good flush through . Easy

[Charlie Allen]

To jet the drain you start at the other end, from the manhole.

[BDCS]

Once you remove the silt from the GULLY a quick blast with your boot around the gun usually surfices. It may well just go to a soakaway thats full.

[M Roberts]

If you haven't already get yourself a decent wet vac which will allow you to vac and pump out, would save you having to wash down customers drains and prevent these problems  plus you will need a genny 
I honestly don't know how we used to work without one!

[Smurf]

Best practice as already mentioned is not let sand/crap go down any type of drain in the first place. That way you should not get any come backs from custards or worst get reported for dumping stuff down the  nearest roadside drain.