Valve Immersion Dripper

A valve immersion dripper is a filter dripper with a valve in its base. Close the valve and the water stays with the coffee, so it steeps like a French press. Open it and the coffee drains through a paper filter like a pour-over. Hario and Bonavita both sell theirs as an immersion dripper, and you’ll also hear “valve dripper”. The Clever Dripper, Hario Switch and NextLevel Pulsar each have their own page; this one explains the idea they share, the different kinds of valve, a recipe that works in any of them and how to choose.

The short version

• Steep, then drain: a valve holds the water in, then lets the coffee run out through paper.
• Three kinds of valve: opened by setting it on a mug (Clever), by a switch or lever (Hario Switch, Bonavita), or by a dial or flow valve that can also slow the flow (Pulsar, December).
• A simple recipe: 15 g of medium-ground coffee, 250 g of water at 95°C, steep to about 2:15, drain by about 3:00 to 3:30.
• Steep times in published recipes sit around 2 to 3 minutes.
• The cup: the body of immersion with the clean finish of a paper filter.

How does a valve immersion dripper work?

Every valve dripper does the same two jobs in turn:

1. Immersion. With the valve shut, all the coffee sits in all the water, as in a French press or a cupping bowl. The maker of the Clever says cupping was a key design idea behind it.
2. Drawdown. When you open the valve, the coffee drains through a paper filter, which holds back the grounds and fine particles. Because the grounds stay in the filter, cleaning up is just a case of lifting the paper out.

The valve is the only clever part. Everything else is an ordinary cone or flat-bottomed dripper.

Why is it called a hybrid brewer?

Coffee brewing splits into two families. Immersion steeps the coffee in water (French press, cupping). Percolation passes water through a bed of coffee (V60, Kalita Wave, filter machines). The coffee author Scott Rao explains that percolation extracts more efficiently because fresh water keeps arriving while strong coffee leaves, whereas in immersion the liquid just gets steadily stronger and extraction slows down.

A valve dripper can do either, or both in one brew. Close the valve and it’s immersion. Leave it open and pour, and it’s percolation. Coffeeness calls the Hario Switch a “hybrid brewer” because you can design recipes that combine immersion and percolation in timed sequences. NextLevel even labels its Pulsar recipes by the mix: its Basic Recipe is described as “mostly diffusion” and its Batch Brew as “mostly percolation”. When the coffee scientist Jonathan Gagné sketched his ideal dripper, he wanted a valve for exactly this reason: to allow “either normal pour-over methods or steeped immersions”.

What kinds of valve are there?

Valve type	How it works	Examples	Can it brew as a plain pour-over?
Mug-activated	Stays shut on the counter, opens when set on a mug or carafe	Clever Dripper	Not really: it only opens on a mug
Switch or lever	A switch you press or flip by hand opens and closes the outlet	Hario Switch, Hario Mugen Switch, Bonavita Immersion Dripper	Yes, leave it open
Dial or flow valve	A dial or valve can shut the outlet and also set how fast it drains	NextLevel Pulsar, December Dripper	Yes, and you can slow the flow

Mug-activated. The Clever’s valve opens on contact when you put it on a mug, as Ozone Coffee describes it. It’s the most hands-off design, but you can’t hold the water in once it’s on the mug.

Switch or lever. On the Hario Switch, a switch on the side of the silicone base moves a stainless steel ball that blocks the outlet. Hario also sells the Mugen Switch, a plastic version with star-shaped grooves in place of the V60’s spiral ribs. The Bonavita Immersion Dripper is a porcelain cone with an open/close release switch, a lid and #4 filters.

Dial or flow valve. These go a step further: as well as open and shut, they let you choose how quickly the coffee drains. The NextLevel Pulsar has a flow valve; Gota notes that many Pulsar recipes give its opening as a clock position, such as “open to 12 o’clock”, for a repeatable flow rate. The December Dripper, designed by Nick Cho with the Korean barista Youngmin Lee and launched in South Korea in February 2017, is a flat-bottomed dripper that Daily Coffee News says seems to use the Kalita Wave as its foundation. Its upper part rotates to close its 12 holes four at a time, from fully shut to four, eight or all 12 open.

How do the main valve drippers compare?

	Clever Dripper	Hario Switch	Bonavita Immersion Dripper	NextLevel Pulsar	December Dripper
Valve	Opens on a mug	Steel ball, switch by hand	Open/close switch	Flow valve	Rotating dial, 12 holes
Shape	Cone	V60 cone	Cone with vanes	Flat bottom, no bypass	Flat bottom, Kalita-style
Material	Plastic	Glass or ceramic, silicone base	Porcelain	Heat-stable plastic	Check the maker
Filters	Size 2 (300 ml) or size 4 (500 ml), per Ozone	V60 02 or 03	#4 cone	NextLevel’s own Pulsar papers	Kalita fluted
Capacity	300 ml or 500 ml models, per Ozone	200 ml (02) or 360 ml (03)	Up to 450 ml, per CoffeeGeek	About 380 ml, per Gota	Similar size to a Kalita Wave
Best for	Easy, consistent steeping	Steeping, pour-over or a mix	Steeping in a porcelain brewer	Controlled flow and percolation	Fine control of flow

The Clever, Switch and Pulsar each have a full guide with their own recipes, so follow the links for brand-specific detail.

How much coffee and water should I use?

Here is what makers and well-known guides publish for a straight steep-and-drain brew:

Source	Brewer	Coffee	Water	Steep before opening	Total time
Ozone Coffee	Clever	15 g, medium	250 g at 95°C	Until 2:15	About 3:00–3:30
Hario Europe	Hario Switch	Not given	Not given	About 2 minutes	Not given
Coffeeness	Hario Switch	15 g, medium	250 g, 40 g bloom first	Until 2:00, then stir	Not given
INeedCoffee	Bonavita	30 g, drip grind	About 1:17, 200°F (93°C)	2.5–3 minutes after the bloom	Not given
NextLevel	Pulsar	20 g, 800–1,000 µm	340 g	Bloom only, valve opened 0:30–1:00	4:00–5:00

The pattern is clear: about 1:16 to 1:17, a medium grind and a 2 to 3 minute steep for a full immersion brew. The Pulsar is the odd one out, because NextLevel uses the closed valve mainly for the bloom and then pours with it open, so it’s closer to a pour-over.

What grind size should I use?

Medium, like filter coffee, for a full steep. Ozone Coffee describes it as coarser than espresso and finer than French press. If the coffee tastes sour or thin, grind a little finer; if it tastes bitter or dry, grind a little coarser.

How do you brew in a valve dripper, step by step?

This is Ozone Coffee’s Clever recipe, written so it works in any valve dripper:

1. Rinse a paper filter with the valve open and throw the water away.
2. Close the valve (or stand a Clever on the counter) and add 15 g of medium-ground coffee.
3. Pour in 250 g of water at 95°C and stir gently for about 15 seconds. Put the lid on if there is one.
4. Steep until about 2:15.
5. Open the valve, or set a Clever on your mug, and let it drain. It should finish at around 3:00 to 3:30.

Brew mode on this page times the steep and the drain for you. Once that’s working, try a hybrid: Coffeeness suggests leaving the valve open for the first minute and closed for the second, and Tetsu Kasuya’s Switch recipe takes the idea further.

How is it different from pour-over and a French press?

	Valve immersion dripper	French press	V60 pour-over
How it brews	Steeps, then drains through paper	Steeps, then a mesh plunger holds back the grounds	Water flows through the coffee the whole time
Filter	Paper	Metal mesh	Paper
Cup	Clean, with medium body	Heavy, full, some sediment	Clean and bright
Technique	Little: the steep time does the work	Little	Careful, steady pouring
Clean-up	Lift out the paper	Scoop or rinse out loose grounds	Lift out the paper

The paper is the big difference from a French press: Ozone Coffee notes that it holds back fine particles and some oils, so you get a cleaner cup with less sediment. Against a V60, the steep makes it more forgiving, because pouring technique and flow rate matter much less.

What goes wrong, and how do I fix it?

Problem	Likely cause	Fix
Sour or thin	Grind too coarse or steep too short	Grind a little finer or steep a little longer
Bitter or dry	Grind too fine or steep too long	Grind a little coarser or open the valve sooner
Drains very slowly	Grind too fine	Grind a little coarser

How do you clean a valve dripper?

Lift out the filter and grounds, then rinse the dripper under running water, opening and closing the valve so nothing stays trapped in it. Gagné suggests holding the Pulsar’s valve open as you tip it over the bin, which stops suction holding the filter in. Bonavita’s porcelain brewer is dishwasher safe, according to INeedCoffee; check your own brewer’s instructions before using a dishwasher.

General guidance only. Take care with hot water and glass, and follow the maker’s instructions for your dripper.

Valve drippers vs other methods

• Clever Dripper: the mug-activated valve dripper.
• Hario Switch: a V60 on a switch-operated valve.
• NextLevel Pulsar: a no-bypass dripper with a flow valve.
• French press: steeping with a metal mesh and a heavier cup.
• V60: pure pour-over, with no steep.
• Kalita Wave: the flat-bottomed dripper the December appears to build on.

Explore every hybrid brewer in the hybrid chapter.