House & Garden Wrench for 5, 10 and 20 L Caps | 51-61 mm Jaws

What the Bottle Wrench Fits, in Millimetres

Two openings, one at each end, and the range is 51 to 61 mm. That is the whole specification, and it decides whether the tool is any use to you. The twenty litre jug uses one side. Flip the tool over for the five and ten litre bottles. So the wider jaw is the twenty litre cap and the narrower one covers both smaller sizes. The tool measures 8.7 in long by 3.4 in wide and 1.2 in thick. It weighs a tenth of a pound. The manufacturer part number is HGWRNCH. What it does not fit matters as much as what it does. A one litre bottle has a smaller cap and sits outside the range. Nor does a fifty or two hundred litre drum, which closes with a bung instead. Across the rest of the line, the list it opens is long. Cocos A and B and Soil A and B each come in five, ten and twenty litre sizes. Aqua Flakes A and B come in ten and twenty, and Amino Treatment and Roots Excelurator Gold in five and twenty.

Why a Cap Opener Exists for a Twenty Litre Jug

A factory cap on a full jug is tighter than it looks, for two reasons. The first is torque, since these are filled and capped on a line rather than by hand. The second reason is chemistry, and it is the one that catches people out. A nutrient concentrate is a salt solution, and the film that creeps into the cap threads dries and crystallises there. Leave a jug standing a month between feeds and the cap has glued itself shut. Hands slip on wet plastic, and the usual next move is a pair of pliers. That is where the real cost sits. Crack the cap or round off its flats and the jug can no longer be sealed. On a twenty litre container that is an expensive afternoon. A moulded jaw spreads the load around the cap instead of pinching it at two points. The matching pour spouts finish the job, one for the twenty litre and another for the five and ten. Keep it hanging with the jugs rather than in a drawer. A tool nobody can find gets replaced by pliers every time.

Key Features

• Two jaws, 51 to 61 mm: The range covers three container sizes in one tool.
• Wide end for twenty litres: Which is the jug most likely to have seized itself shut.
• Narrow end for five and ten: The same jaw takes both of the smaller bottle caps.
• Spreads load around the cap: Rather than pinching it at two points, the way pliers do.
• 8.7 in of leverage: Long enough to break a factory torque without a second tool.
• A tenth of a pound: It hangs on a hook by the jugs instead of filling a toolbox.
• Opens most of the range: Cocos, Soil, Aqua Flakes, Amino Treatment and Roots Excelurator.
• Pairs with the pour spouts: One spout for twenty litres, another for the five and ten.

Technical Specifications