Rack, bridge or trivet for a water-bath pot

What the support does

A pot support is a separate, movable piece placed between the bottom of an outer vessel and the base of an inner pot. It carries the inner pot while leaving room for water to circulate below and around it. In a water bath, that gap lets the bath contact more of the pot’s exterior instead of leaving the inner pot flat against the outer vessel’s heated floor. The support does not heat or regulate the bath; that job belongs to the surrounding pot, cooker or circulator.

The category describes a shared job, not one interchangeable design. A rack usually spans or stands above the vessel floor; a bridge crosses the rim; a trivet uses a small number of feet, bars or an open frame. Which form fits depends on the vessel’s inside dimensions, rim and floor, and on the pot being carried. A source documenting one form does not establish that another will fit or bear the same load.

A documented water-bath use

A contemporary stainless-steel trivet listing describes the item as one used by cheesemaker Gavin to allow water to circulate under stainless-steel pots in a precision-cooker or sous-vide bath. The listed trivet measures 18 × 18 × 2 cm and weighs 94 g; those figures belong to that retail example, not to the whole equipment class. The listing does not give a safe load rating.

Tony Hamblyn’s published home-cheesemaking setup demonstrates a related but different solution. He removed the mash tun’s false bottom and rested the handles of a smaller cheese pot on the outer pot’s rim, creating a water jacket between vessels. His interview does not show a rack under the cheese pot. Rim support can therefore be described as an alternative configuration, but not as another name for this trivet or as proof that any rack can carry the same pot.

The canner photograph here shows a wire rack carrying jars in boiling-water canning. It is useful for seeing an open rack and the space beneath its load, but it documents jars, not a larger inner pot. The outdoor photograph shows a cross-braced, four-legged trivet beneath a lidded cast-iron cooking pot. Together, these images show separate examples of support forms; neither establishes a universal design.

Fit, load and limits

Before choosing a support, compare the pot base with the outer vessel’s floor and wall, and check that the support cannot rock or slide. A bridge must sit securely on the vessel rim; a freestanding rack or trivet needs a stable floor contact and enough open area for water flow. The inner pot should sit level. The sources give no general dimensions or rated load for this equipment class, so the mass of a particular filled pot must not be inferred from a photograph or from the support’s appearance.

A brewing false bottom is a separate component with a different documented purpose. KegLand’s BrewZilla instructions say its perforated false bottom is not designed to hold the weight of a grain bill; the dossier therefore does not treat it as a safe stand for a second pot. No inspected source documents a rack or bridge inside a brewer or certifies a support load there. Keep the support clear of the appliance’s element, probe, pump inlet and overflow, and test the intended assembly cold before applying heat; these are precautions for an adaptation, not a manufacturer-approved configuration.