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Sorry, typo on last msg. Should read ... "This method works if you have enough time available for slowly getting most of the kiln-sand out with a hook-knife."

My solution to the jammed recessed block paving covers was as follows. 1. Find an old thin steel kitchen knife (about 9" blade length) that will fit between cover and casing. Grind a hook feature at the pointed end. 2. Gradually work round the tray with the knife lifting out sand from the...

Had this same problem recently. New block paving driveway was laid last year. It has two Clark-Drain oblong recessed covers with cemented -in block paving inside each tray. Unfortunately the paver completed the driveway by using a vibratory plate to force kiln-sand between the paving blocks. I...