- The hole for the drop in anchor is too big. The right size hole is 1/2” round hole (1 1/2” deep). If the hole is more than 1/2” in diameter, you will need to drill another hole of the correct size and reset the anchors.
- The drop in anchor has not been centre punched. By doing this with a centre punch (or large nail) it will force the legs to open out into the concrete. This will secure it into the concrete and it will not rotate.
- You may have over-tightened the anchor bolts. You need only turn the bolt about two turns to engage the threads, this will be enough to hold the system while in use. If the anchor bolts have been over-tightened you can fix this by using a centre punch (or large nail) to reset the anchor in the same hole.
Why does the drop in anchor (concrete seal) turn when I tighten the anchor bolt?
This happens occasionally, typically as a result of one of the following: