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Espresso Pulling Too Slow: Causes and Fixes

Updated August 3, 2026 · Home and commercial machines

A shot that drips, stalls, or takes 45 seconds to reach volume is nearly always ground too fine for the dose you are using. Grind is the primary variable for shot time, so change it first and change nothing else. Aim for roughly 18 grams in and about 36 grams out in 25 to 30 seconds from a standard double basket, and step coarser until you land in that window. Overdosing is the second suspect, because a basket packed past its rating leaves no headroom and the puck compresses against the screen. Dark, oily roasts choke faster than lighter ones at the same setting, so a bag change alone can push you into dripping. If grind and dose are already correct and the shot still crawls, the restriction is hardware: blocked basket holes, a clogged shower screen, or scale upstream.

Causes, most likely first

Work down the list. Each cause has a check you can perform before you change anything, so you are diagnosing rather than swapping parts.

  1. 1. The grind is finer than the dose and basket can carry

    You can fix this

    How to confirm it: Time from pump start to the moment you hit 36 grams in the cup. Anything past 35 seconds at an 18 gram dose is too fine. A puck that stays soggy and prints the shower screen deeply into its surface confirms it.

    What to do: Go coarser in small increments, three or four clicks on a stepped grinder or a few degrees on a stepless collar, and pull again. Purge a few grams of old coffee out of the grinder after each change so you are timing the new setting, not the last one.

  2. 2. The basket is overdosed

    You can fix this

    How to confirm it: Tamp, then fit the portafilter and remove it again. If the shower screen has left a clean, deep imprint in the coffee, there is no headroom. Weigh the dose against the number stamped on the basket.

    What to do: Drop the dose to the basket's rating and re-level. Leave a few millimetres between the tamped surface and the screen. If you want a larger drink, use a larger basket rather than forcing more coffee into a small one.

  3. 3. The coffee is dark-roasted, oily, or freshly roasted and still gassing

    You can fix this

    How to confirm it: Check the roast date on the bag and look at the beans. Visible surface oil, or a roast date within the last three days, both slow extraction at a setting that worked with your previous bag.

    What to do: Coarsen the grind by a few clicks whenever you change bags, and rest very fresh coffee for four to ten days after roasting before expecting stable shot times. Treat every new bag as a fresh dial-in.

  4. 4. The basket holes are partly blocked with old grounds and oils

    Routine maintenance

    How to confirm it: Hold the empty, dry basket up to a light and look through the floor. Dark spots where light does not pass are blocked holes. Run water from the tap through it: a clean basket sheets water evenly through the whole base.

    What to do: Soak the basket and portafilter body, minus any plastic handle, in a cleaning-tablet solution for 20 to 30 minutes, then brush the floor from both sides and rinse thoroughly. Do this weekly if you pull several shots a day.

  5. 5. The shower screen is clogged with compacted fines

    Routine maintenance

    How to confirm it: Run the brew cycle with the portafilter out. Flow that comes through in a few thin jets, or that starts slowly then bursts, means the screen is loaded. Wipe a finger across the underside: heavy dark paste is a clogged screen.

    What to do: Remove and soak the screen in cleaning solution, brush the group seat, and refit. If your machine has a 3-way solenoid valve, add a detergent backflush with a blind basket to your weekly routine. Machines without that valve should not be backflushed.

  6. 6. Scale upstream of the group is choking the water supply

    Routine maintenance

    How to confirm it: Compare the blank-shot flow rate with no portafilter fitted against the machine's original output. If even the blank flow is slow and your coffee has been getting steadily slower over months regardless of grind, the restriction is in the water path.

    What to do: Run a full descale cycle, rinse with two clean tanks, then re-dial your grind, because the recovered flow will make your current setting run fast. Add a water filter to slow the deposit rate.

When to stop and call a technician

Never bypass, disable or remove a safety device — a thermal fuse, pressure relief valve or lid interlock is the part standing between a fault and a fire. Do not open a pressurised boiler or work on mains wiring.

What the fix needs

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If your machine shows a code

A code on the display narrows this down considerably, because the machine is telling you what it thinks is wrong. Look it up by brand →

Other faults

Frequently asked

Should I tamp harder or softer to fix a slow shot?
Neither. Tamp pressure past the point of compacting the bed makes very little difference to shot time compared with grind size. Keep the tamp level and consistent and use the grinder to change the speed.
How much should I change the grind at a time?
Small steps. On a stepped grinder, three or four clicks usually moves shot time by several seconds. Change one setting per shot so you can attribute the result.
My shot starts fast then stalls. Why?
That pattern usually means fines migrated down and blinded the basket mid-shot, often from an uneven distribution or a very fine grind with lots of dust. Redistribute more carefully and coarsen slightly.
Is a 40 second shot always wrong?
Not by rule, but at 18 grams in and 36 out it means the water is spending too long in contact with the grounds and the cup will usually taste harsh and dry. If you prefer longer contact, do it deliberately with a smaller ratio rather than by accident.