Pool Cover Anchors - Further Reading

Pool Cover Anchors

Pool Cover Anchor with Spring On.jpg

Pool cover anchors are used to fasten the straps of winter pool covers to the ground or deck.

The anchors are typically brass. They screw down flush to the ground for the the pool season and screw out to provide anchor points for springs attached to the cover straps. Some older anchors are pop up type.

The brass anchors have different housings depending if they are going into concrete or pavers, or grass and dirt.

Concrete deck anchor casings are held in place by friction/tension. A 3/4" hole 2 1/4 inches deep is made in the concrete (standard deck assumed) but the top rim of the casing is slightly larger. When the casing is tamped in, it is squeezed and held in place.

9”, 15" or 18' pipes with a 1" OD are used to secure anchors to pavers, bricks, stone or grass. Meyco has 16" lawn spikes for planter areas and 18" lawn pins to go into soil.

Loop-loc recommends a silicone spray for lubrication and protection of the brass anchors.


A 1/4" Allen Key is used to turn the brass anchors.

A steel installation rod with a notch in the bottom that fits over the anchor is used to stretch the spring and stretch it over the anchor.

Loop Loc has as aluminum tamp tool for installing brass anchors.

You can use a drill with a backwards screwdriver bit or a cut off allen key in it to loosen and tighten the anchors.


Chipped Anchor Holes in Concrete

Pool Cover Anchor Chipped.jpg
  • Some chipping is normal with a hammer drill. The bit used, however, can make a difference.[1]
  • Two bladed bits do not drill as clean a hole as a four bladed bit.
  • Worn bits don't drill as cleanly as fresh, high quality bits.
  • Good bits are expensive. So the final result is a function of the installer and his choice of tools.
  • Best are four bladed Bosch bits and brass trim rings.

Trouble getting a 'screw-up' anchor to come up

  • Make sure that the tool can go in all the way (i.e. - remove any sand or pebbles from the hole the 1/4" Allen wrench fits into) These anchors are brass and brass will 'strip out' easily, be sure that you have as much contact between the tool and the anchor as you can![2]
  • If you can get the anchor to come up a little, blow out the debris in there and splash some water into the shell. This will wash away some more of the stuff that's clogging the threads. Turn the anchor back down, to allow the water to wash out more stuff from the other threads. Raise, rerinse and repeat until the whole anchor comes out - then rinse out the body of the anchor and the anchor's threads.
  • If an insert will move at all, you can get it out. Just put some water on the screw and work it in by moving the screw back and forth until the water loosens the dirt. Be patient and keep adding water to flush out the grit and it will come out.[3]
  • use a regular long allen key and insert the short side of the allen key into the anchor. Used the long handle of the install-removal tool to go over the long side of the allen key for more torque to unstick the frozen anchor.[4]

Anchor Housing Spins in Concrete

  • Pull the whole thing out of the deck and lock onto the shell with channel locks or vice grips. Then work the anchor out as per above. Once the anchor has been freed and the threads cleaned and lubed, slide the whole thing back into the hole it came out of. [5]

Seized Anchors

The anchors can seize from sand and grit in the threads and not turn. Techniques to break it free include:

Anchors Stuck in Paver Tubes

Get a metal tube that exactly matches the diameter of the existing tube and put the tubes end-to-end. Then, put the tube on the ground and hammer the anchor out.[6]

Alternatively, put a metal rod inside the tube against the anchor and hold the tube and bang the metal rod against the ground.

If you use a heat gun on the tube, it will cause the tube to expand some and make the anchor pop out easier.

Anchor Head Snapped Off

Pool Anchor with Broken Head.jpg

To remove an anchor, first lightly score around the anchor to reduce contact with the deck.[7]

Then, drill and tap the center hole with a 5/16-18 tap. The drill bit and tap comes as a set. Drill bit size 17/64".

Then place a metal tube over the anchor. A 3/4" copper coupling should fit the scored area around the anchor.

Then, screw in a long 5/16-18 bolt with 2 big washers and a coupling nut above the washers. The bolt will need to be about 6 to 8 inches long to accommodate the anchor, coupling and coupling nut.

Then, hold the bolt and tighten the coupling nut to pull the anchor.

Scoring around the anchor a little bit and having the copper coupling sit in the scored area should reduce the risk of surface damage, but pulling an anchor always risks damaging the deck.

If you use a 3/4" hole saw to drill the top part of the anchor, that will remove the ridges around the top of the anchor, which will reduce the risk of surface damage.

To keep the hole saw steady without wobbling, you can first drill a hole in a piece of wood and then put that hole over the anchor then drill through the hole.

The hole for the anchor is 3/4", but the top ridges are slightly larger. So, when the anchor is hammered in, the ridges dig in and get compressed, which holds the anchor in place.

Hex Socket is Stripped

  • If the bolt is stripped, from not inserting the bit deeply enough), you can drill them and use an easy out tool.
  • Get a set of "screw extractors". Drill the appropriate pilot hole and the use the reverse threaded bit to extact the screw. If that doesn't work, keep drilling successively larger holes and eventually, either the body of the screw can be picked out or you will just drill the whole thing out.
  • You can try to use a pair of channel locks to try to unscrew the anchor (wear glove to protect your knuckles when you slip off). Use lots of lubrication to try to make the job easier.[8]


  • Anchors need to be out at least 1/2”
  • The installation bar needs the anchor out 1/2” to work properly
  • Do not screw the anchor back down after putting spring on. You need the anchor up to hold the spring against snow loads