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Harmer Uni-Ring is a versatile, economical system for concealed drainage beneath paving slabs, based on shallow injection moulded polyethylene rings.
Do Harmer Uni-Rings allow for any slope compensation?
Harmer Uni-Rings can be stacked two high, and the Uni-Plus Rings are adjustable between 25 and 40mm, but if slope adjustment is required, the Harmer Modulock range should be used.
White House Works, Bold Road, Sutton, St Helens, Merseyside, WA9 4JG