Northstar Plastics Grooming Tub StrainerDescription Northstar Plastics Grooming Tub Strainer The Grooming Tub Strainer keeps hair out of the drainage system, preventing restriction and blockage. Installation Awareness Regardless of the application, at least 8" of clearance must be maintained in the direction of strainer removal when installing the strainer. Depending on the orientation, this will provide enough space for a catch container to collect any water or debris held in the unit.