I only half see what you mean.
How do you propose to use these?
I see two tpes - the rigid fibreglass ones and the fishing tapes.
Are you suggesting that these are used for clearing downpipes?
How?
Do you put some sort of bung on the end of the hook and draw it through the pipe?
If so, how can it cope with the funy angles that you get near the hopper at the top of the pipe?
How can you cope if the pipe does not have an open end where it gets to the ground?
Is the flexible fishing wire the preferred choice?
The spring steel one on the reel is the best one to have, I'm not saying the used by anyone else, I am saying this is what I use.
There like the drain clearing tool you can buy, they will go around all the bends of down pipes.
I added a little hook to mine, when you feel a blockage just give a little extra push and a slight twist and this does the trick of grabbing the blockage, you simply then pull it downwards.
The fish tape I use on the reel is so flexible, that if I get a down pipe that is sealed on the end with a rubber bung, you can remove the rubber bung and normally get your fingers in enough to slip the fish reel into the bottom of the down pipe and feed it up the pipe.
There has been cases where the down pipe goes into a solid ground with no access in this case you have to look for alternative ways, I was able to slip the joint on one of them and access through there.
I am designing my self a little wheel that I can add to my pole that will direct the end of the fish wire into the top of a hopper, but I'm not 100% sure this will work until its built and tested.
Apart from doing all the above also using the pressure lance if all that fails then its back to ladders, but my intentions are to completely remove ladders from my business, were there is a will there is away, so I will design something to help me acheive this aim.
