Sand or water: how to fill a portable basketball hoop base

Sand or water, decided properly

Every portable base on the market is a moulded plastic tank with a screw cap, and every maker says the same thing: fill with sand or water. They are not equivalent.

The honest summary is that sand is the right answer and water is the convenient one. If the hoop moves in and out of a garage weekly, water is defensible — how to move a portable hoop covers shifting a filled base without draining it, which is usually easier than people expect.

The weights, worked out

Makers publish base capacity in gallons, not pounds, so the useful number takes one step of arithmetic. Water weighs 8.34 lb per US gallon.

Put those numbers next to what the hoop has to resist. A 54-inch board is a sail in a gust, and a teenager pulling down on the rim applies a lever several feet long. Two hundred and twenty-five pounds at the bottom of that lever is not much. Wind and tipping works through the geometry and the anchoring options.

Getting sand in, which is the only hard part

The fill cap on most bases is two or three inches across, which is not generous. The method that works:

1. Buy dry play sand or paver sand, in 50-lb bags, and keep it dry until it goes in. Damp sand bridges and will not pour.
2. Make a funnel from a cut-down plastic bottle or buy a wide one. A length of 2-inch pipe into the cap works even better.
3. Pour slowly and shake the base every few bags. Sand finds its own level reluctantly, and an unshaken base will read full while there is a void at the far end.
4. Fill the hoop in position, with the pole assembled and standing. A filled base is not something you then wheel across a lawn.
5. Seal the cap properly. Sand plus rainwater through a loose cap makes a cement-like sludge you will never get out.

If you use water

Fill from a hose to the maker's capacity, with the hoop standing in its final position, and seal the cap. Then two maintenance jobs follow. Check the level at the start of every season, because water evaporates through the cap and a base can be twenty per cent down by spring. And in a freezing climate, deal with it before winter: water expands when it freezes and a plastic base is the thing that gives.

Do not put automotive antifreeze in a basketball base. It is toxic to animals and children, it will be in your driveway, and there is nothing to protect in there — the base is not an engine. Portable hoop winter storage covers what to do instead, including whether to drain at all.

Adding weight on top

Every maker's published capacity is a compromise between stability and what two adults can wheel. The standard fix is ballast on top of the base: Escalade's universal weight bag holds up to 100 lb of sand, is built to sit on most portable bases, and is rated by its maker for rain, snow and sun.

A sandbag or two from a hardware store does the same job less tidily. What you should not do is stack cinder blocks on a moulded base — the point loads crack the plastic over a season, and the blocks become a trip hazard right where people land.

Four mistakes worth not making

• Filling before assembly. Assemble the pole and board first, stand the hoop where it lives, then fill. A full base weighs more than two people want to move.
• Stopping at “mostly full”. The published capacity is a minimum, not a target range.
• Using damp sand. It will not flow through the cap and it sets into a lump.
• Leaving the cap loose. Rain in a sand-filled base is how you get a tank you can never empty.

Get all four right and the hoop is as stable as its design allows. If it still rocks after that, the cause is elsewhere: how to stop a hoop from shaking works through hardware, footing and pole splices in order.