The drain-gully into which our kitchen sink discharges is particularly deep. The trap leading to the drain proper is two-and-half feet down hence when blocked, which is often, it is reachable only by be-boilersuited orang utan.
There is a manhole about eight feet away; from which one would expect to be able to rod the drain upstream to dislodge/break-up the blockage. However, the drain takes two sharp, perhaps even right-angle, bends on its way to the manhole. Normal drain-rods i.e. polypropylene ones from the DIY-sheds, cannot get around said bends. Even a self-propelled (by pressure-washer) narrow-bore drain-cleaning hose can't negotiate them.
We'd prefer not to call-in one of the drain-contractors but find the best way of doing it ourselves. And before you ask, the current blockage has so far proved resistant to chemicals.
Such things as coiled-spring drain-rods exist, apparently. Has anyone experience of these, please? Are they likely to be stiff enough to take the requisite shove yet at the same time flex sufficiently, too?
Either they go round the bend or I do.
Thanks, in advance.
'I.T.'