Harmer Uni-Ring is a versatile, economical system for concealed drainage beneath paving slabs, based on shallow injection moulded polyethylene rings.
Performance
- Harmer Uni-Ring comprises stackable units with spacers for open joint drainage when required
- Spacers are collapsible for closed jointing and edge detailing
- Shims available for fine height adjustment
- Uni-Ring provides full load spread; units not required to subdivide for edge or corner detailing
- Watertight and resistant to mould and freeze-thaw
- Can accommodate a variety of paving slab thicknesses
- Unit sizes, spanning capacity and loading of slabs determine spacing and layout pattern
Materials & Finishes
- Manufactured from shallow injection moulded polyethylene