This Probac Drain and Maintenance Cleaner is really Effective for the maintenance and odour-control of drains. It is also effective cutting through and cleaning grease traps/french drains. It is totally Safe and in fact highly beneficial for septic tanks, bio-digesters and grey-water systems. Please note that this product is not intended to unlock drains, but is for cleaning the drain to ensure it does not get blocked.
Pour 250ml into the top of drain and leave overnight. Problematic drains may need a repeat dose of Probac Drain and Maintenance Cleaner. If the problem persists, check for an obstruction in the pipe.
Maintenance dose: Use half a cup (250ml) per drain, once per monthly. Leave it to stand overnight!