Grate seal GS01 suits 100mm and 80mm existing floor waste drains and prevents smells, odours, soap suds, noise and vermin from waste pipes and drains. Specially designed, one-way rubber valve that fits straight into an existing waste outlet. Once the valve is fitted, it will prevent hazardous sewer gasses, airborne bacteria, soap suds, vermin and noise from making their way out of the drainage system and into habitable areas. The one-way valve does not restrict flow through the drainage system - the flow rates achieved by the Grate Seal can easily cope with the maximum allowable flows from plumbing fixtures. Can be used with most common sizes of waste pipes and outlets. Some typical applications for the Grate Seal are Floor wastes, Shower wastes, Laundry floor wastes, Plant room floor wastes, Urinals, High-rise buildings Domestic, Commercial & Industrial applications. Two sizes of Grate Seal are available which cover 100mm, 80mm and 50mm diameter waste pipes and drains. GS01 suit both 100mm & 80mm pipe; GS50 suit 50mm pipe.