Had plumbing blockage and over the last few days no amount of attempts to unblock worked, fishing around with those twisty wire things, bottles of chemicals, those bellow-type plungers..,.. nothing.
This was the last resort before calling someone out and have to say quite a nifty bit of kit for £22~ - Can charge up to 7 bar of air pressure to force through any blockage.
Is there not a risk of the air pressure damaging the plumbing? Especially if it's not in the best condition.