Question about Rancilio S24 Espresso Machine

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Increasing water flow rate

How do I adjust the machine to increase the water flow rate to the coffee basket?

Posted by David Volpi on

  • Anonymous Sep 13, 2008

    My problem is similar. I have a La San Marco 2 group head manual. My water flows at about 250ml in 7 seconds. Far too fast meaning that I am compensating to get my 60ml in 25 second shot by grinding very fine. The water pressure is set at 9 bars. How to I lower the water flow rate?



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Back-flush the machine regularly and check your water hookup and make sure you to not have a small diameter water line. Other than that it is controlled by the water pump I believe. If the solenoid (the silver thing attached to the pump) used to start the pump is old it could slow down the pump start cycle.

Posted on Feb 26, 2008


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Just brought dolce gusto mini me. Milk flowing out everywhere.

You are not supposed to fill the machine with milk. Just water. It is a pod machine, you put a coffee pod in the slot. Then water in the tank. Push the button and it heats the water then when ready push it again and it dispenses hot water through the coffee pod. In your cup you will have hot coffee with crema. If you have a milk frother/volumiser then you add milk.
If you add milk to the pod tank, it heats up, volumises aka increases in volume and flows everywhere. I suggest you read your manual :)

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1 Answer

Water will get hot but not flow to the mixing basket

Most likely your system needs to be de-limed. All water has a certain amount of dissolved minerals in it and when heated those minerals will precipitate out into a white, crusty material. Often this material will clog up the works of your coffee maker.
In order to remove the deposits, you have to increase the acidity of the liquid within the coffee maker. The easiest way to do this is to drain the water and then fill the maker with about 18 ounces of white vinegar that you can buy from your local supermarket.
It may take some time before the lime deposits dissolve and you may even have to use a wire probe to carefully remove any blockage of any of the holes that the water has to flow-through to get through the system.
After you've got the lime removed and the unit is working properly, run some clean water through the system and clean any external parts to make sure you don't get vinegar flavored coffee.

Dec 22, 2010 | Bunn VPR Coffee Maker

1 Answer

What does "low flow" mean? Thx

Thank you for posting your question here on

The flow of water thru the flow meter is too low and the generator is not working because of that. Cleaning the filter is usually what is required to improve the flow rate. If that doesn’t solve the problem look for obstructions in the plumbing such as clogged or full skimmer baskets, full strainer baskets on the pump inlet or some other blockage. Once the flow increases the error should clear itself and the generator should start to work.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


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Have made the manual adjustments to increase the water flow but no increase in flow out of the bubbler. Is there a filter or part that needs to be replaced to allow better water flow?

Have made manual adjustment to increase the water flow with not much change at the bubbler. Is there additional work that I can do to increase the the flow? I have siffient flow for supply but what comes out of the bubbler is barely drinkable. Possible a filter or other parts may need to be replaced?

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Filter basket overflows after cleaning Bunn VPR Coffee Maker

Some people also try adding fresh grounds to brewed grounds, resulting in an overflow. A restricter valve can be used, but a better solution is to simply pour in half the water at a time. This is what people who buy non Bunn filters do to stop overfills.

Oct 05, 2009 | Bunn VPR Coffee Maker

1 Answer

Can I adjust the water flow for finely ground coffee?

You probably have coffee ground for a drip coffee pot, not an automatic drip coffee maker. With a drip coffee pot, you put the coffee in and add the hot water on top of that. You might want to try a coffee press. They are fantastic for the finer grinds of coffee. Some Mexican coffees are ground almost as fine as flour and a press works great. You can get a press for about $12 & up.

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Coffee to weak

if the ajustment of our coffee is griding the coffee to corsely not fine enought look in our manuel dont move the leveler of coofee unless the coffee is grinding in the waste basket our supposed to have like a little hockey puck fairly hard ajust it untill its like that let me now pierre merry christmas pierre

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In the bean hopoer there is a little screw. Remove this screw and the cover and you will see an adjustment alan key. You need to push down and rotate the adjuster counter clockwise to make it finer and clockwise to make it bigger. Make sure you only rotate the grinder a little at a time, 1/4 turns at a time recommended. Make 2 cups then readjust if necessary.

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2 Answers

Increasing water flow rate

With a flat head screw head driver adjust the pump pressure. The screw is on the left side of the image below.


Sep 13, 2008 | Coffee Makers & Espresso Machines

1 Answer

No coffee coming out of the machine!

First step, increase the grinder size. Note: only change grinder setting while the grinder is spinning. If that does not work, look into cleaning your brew group screens. The machine should have came with a key to remove the screen. If your machine as a preground option try making a preground coffee without inserting coffee to see if only water will come out. If water comes out then you know its your grinder. Usually too small of grinder sizes will stop water flow.

If you need a brew group key:

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