Çaydanlık — stacked concentrate teapot

Brews a strong tea concentrate in an upper pot heated by the water boiling in a lower one, so every glass is diluted to the strength the guest asked for at the moment it is poured.

The lower kettle boils; its steam and radiant heat keep the upper pot hot without ever putting the leaf over direct flame. The upper pot holds a high-leaf concentrate. Service is a two-stream pour — concentrate to strength, then water from below to fill. The engineering idea is decoupling: brewing happens once, serving happens many times, and strength control moves out of the brew and into the pour, which is what lets one person serve continuous tea without a brew cycle between glasses. The failure is built into the same design. The concentrate sits over heat for its whole life, so it keeps extracting and keeps evaporating: it grows more tannic and more concentrated at the same time, and dilution corrects the second without touching the first. Stewed tea diluted is weak stewed tea. That is why the control on a çaydanlık is a refresh interval and a discard, never a top-up.

  • Choose this model when tea is ordered continuously, glass by glass, all day — and reject it when tea is a specialty item. The çaydanlık is a black-tea machine. It exists to make strength a pouring decision, and that is precisely the wrong instrument for a green, white or oolong programme where the whole point is a controlled temperature and a controlled steep. A bar running both should run both: a concentrate pot for the volume tea, and a per-pot brew for the menu tea.
  • Size the concentrate pot to the REFRESH INTERVAL, not to the day. This is the decision the whole item turns on. A pot sized for peak means that at every refresh you pour good tea down the drain — and a team that is throwing tea away will quietly stop refreshing on time, which converts a capacity decision into a quality failure. Brew what the next interval will actually sell, and brew again.
  • Make the refresh a scheduled task with a timestamp, not a judgement. The concentrate degrades continuously and invisibly, and nobody tastes the drift because they taste it every hour. Put the brew time on the pot, put the refresh in the shift routine, and let the tracker carry it — the same discipline the batch base and the thermal server already get.
  • Read the heat source as a consistency decision. A hob ring set by hand drifts with whoever adjusts it; a thermostatic base repeats. If the bar is training new staff regularly, the thermostatic version buys back more consistency than any change of leaf will.
  • Buy glass for the concentrate pot if the team is inexperienced. Being able to see that the concentrate has gone too dark converts an expert judgement into something a first-week hire can act on, and it is the cheapest training aid in this category.
  • Cost the hob ring before choosing stovetop. A ring occupied all service on a bar that also plates food is a genuine capacity loss, and it is never in the equipment comparison because it is not in the equipment price.
  • Plan where the concentrate is discarded and where the leaf goes. A wet leaf mass is heavy, hot and awkward, and a station with no discard route grows a habit of tipping it into the sink, which is how a tea station blocks a drain.
  • Confirm the electrical supply for an electric or samovar-style unit, and any gas connection for a stovetop, with a licensed professional; the local authority governs both. This site states no load, no phase and no gas requirement.

At the tea station, with the glasses and the discard route within the same reach, because the pour is a two-handed movement and anything that forces a step mid-pour is a spill. It should not share a counter run with the espresso machine — the two stations both peak at the same time and both need the operator's full arc. If the bar also does food, the stovetop version has to be argued against the kitchen's hob capacity before it is argued against the electric one.

  • Topping the concentrate up instead of discarding and rebrewing. Dilution corrects strength; it does nothing to a stewed pot, and adding fresh leaf to old concentrate makes the problem harder to see, not smaller.
  • Sizing the concentrate pot for the day's volume, then quietly extending the 60–90 minute refresh interval because nobody wants to pour good tea away.
  • Running green, white or oolong through a concentrate model because the equipment is already on the counter.
  • Free-pouring the dilution with no reference line on the glass, so strength is a personality trait rather than a spec.
  • Choosing a stovetop set without counting the hob ring it will occupy for the whole service.
  • Rinsing the concentrate pot all day and never fully washing it, so tannin film becomes the dominant flavour.
  • Leaving the refresh to memory rather than a timestamp on the pot and a task in the shift routine.
  • Applies only to electric and samovar-style units, and load rises with the water vessel rather than with the concentrate pot. Whether a dedicated circuit is needed is for a licensed electrician to confirm and the local authority to govern. This site specifies no amperage or phase.
  • Filled from the same treated source as the rest of the bar. Tea is mostly water, and a concentrate model dilutes with water at the point of service, so the water is tasted twice.
  • A route for discarding spent concentrate and wet leaf that is not the hand sink. Whether a solids-tolerant drain or a bin is appropriate is a plumber's and a local-authority question.
  • Two stacked vessels are taller than either alone, and the upper pot has to be lifted clear of the lower one to be refilled — so the shelf above matters more here than the counter below.
  • Room to lift a hot, full upper pot off and set it down safely, on a surface that will take it. This is the movement the burn happens during.
  • A continuously boiling lower vessel puts steam into the air all service. Site it away from anything paper, powdered or hygroscopic, and account for the heat in the bar's cooling load.
  • Stovetop stacked set
  • Two nesting pots heated on a gas, electric or induction hob.
  • Cheapest to buy, easiest to replace, and it occupies a hob ring for the whole service — which on a bar with any food offer is a real cost. Heat is controlled by whoever last touched the knob, so concentrate strength drifts across a shift unless the setting is written down.
  • Electric integrated stacked boiler
  • A self-heating base with a thermostat, carrying its own concentrate pot above.
  • Frees the hob and holds a repeatable heat, which is the single biggest improvement to concentrate consistency. It also runs unattended, which is exactly the condition under which a concentrate is left standing past its refresh — the thermostat removes the smell of a pot boiling dry, and with it the accidental reminder.
  • Samovar-style urn with concentrate pot
  • A large heated water urn with a tap, carrying a concentrate pot on top.
  • Serves the highest continuous volume of the three and puts the dilution water on a tap instead of a pour, which is faster and safer. It is a fixed installation in practice, it dominates the counter, and it makes the water side of the drink a boiler question — see the boiler entry for recovery and freshness.
  • Single pot brewed to strength
  • The alternative model entirely: one pot brewed at drinking strength and served without dilution.
  • Better tea while it is fresh, because nothing is stewing and nothing is being corrected by water. Worse operation, because the whole pot passes its window at the same moment and there is no strength control for a guest who wants it lighter. Right for a specialty tea programme, wrong for continuous glass-by-glass service.
  • Glass vs stainless vs enamel upper pot
  • The material of the concentrate pot, which decides what the team can see and what survives the wash-up.
  • Glass shows the colour of the concentrate, which turns 'is it stewed?' from a taste test into a glance and is the strongest argument for it on a busy bar. Stainless hides that entirely and survives being dropped. Enamel is traditional and chips, and a chipped enamel pot is both an appearance problem and a food-contact one, so it becomes a replacement rather than a repair.
  • The concentrate darkens and thickens over the shift, and the team compensates by pouring less of it.
  • The pot has been held over heat past its refresh interval and has stewed and evaporated at the same time.
  • Drink quality, invisibly. Pouring less concentrate corrects the strength and not the tannin, so the tea is astringent and thin at once — and every glass after the drift starts is wrong.
  • Strength varies noticeably between staff on the same pot.
  • Dilution is a free pour with no reference line, so the concentrate-to-water ratio is whatever each person's eye says.
  • Consistency, which on a continuously ordered drink is the whole product. A regular who orders the same glass daily notices this before any manager does.
  • The lower vessel boils low or dry, and the upper pot scorches.
  • No level check in the routine on a stovetop set, or a thermostatic base running unattended with nobody assigned to it.
  • Money and downtime — a scorched concentrate is discarded whole, and a dry-boiled pot may be a replacement. On a gas hob it is also a fire risk.
  • A brown film builds inside the concentrate pot and the tea starts tasting the same regardless of leaf.
  • Tannin staining that is rinsed rather than cleaned, because the pot is in service all day and never gets a full wash.
  • Drink quality on every glass and a leaf change that produces no visible improvement — the most demoralising kind of fault for a team trying to improve the tea.

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