Question about Coffee Makers & Espresso Machines
Leaking water when under pressure
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Water leaking into machine
It is normal for a small amount of water to come into the driptray after each coffee brew. This is the pressure releasing from the brew unit. After a while coffee grouts will build up in the bottom of the slot where the brew unit slides on to the valve. (you see this slot when brew unit is removed), Get a small thin wire to poke in the hole and gently pour small amount of water by hand to clear any blockages.
clear water leaks from under the m/c can indicate leaks ffrom the teflon joints and/or steam valve assy. Some early machines had plastic steam valve assy's and leaked like mad. New stainless steel ones are fitted now.
hope this helps
Posted on Apr 11, 2008
There are 2 inserts pins in the steamvalve assembly, they need to be replaced replace. Easiest solution order a new valve assembly.
Posted on Feb 27, 2009
SOURCE: Starbucks Barista Espresso Maker
This is a general comment for people having problems with leaks and pressure in their espresso machines. If you do not used filtered water, the minerals and other materials suspended in the water will bond to the moving parts and tubes of your machine (e.g.: scale). The problem will be worse if you live in an area with particularly hard water. In some cases the pressure pipes can get completely blocked and if the pump is powerful enough, the pipes can rupture, otherwise, the pump will simply not put out any water. The solution is to regularly flush out the system with descaler. The frequency of cleaning depends upon how often you use the machine. You can get descaler from any decent coffe place (like Starbucks), an appliance repair place, or the hardware store. I use CLR which is sold at hardware stores. CLR stands for Calcium-Lime-Rust, and it effectively cleans all of these and is cheaper than specialty scale removers. Simply dilute some in water and pour the mixture in the machine, then cycle the pump and run it through. Collect the spent liquid and run it through again 4 or 5 times (or more if you've never cleaned your machine before...) Allow the liquid to sit for 10-15 minutes between flushes so that the solution has a chance to eat away at the scale. Once you have done this a few times, flush out the machine thoroughly with clean water 4 or 5 times, using CLEAN water each time you rinse. If you want to get an idea of the scale that has been removed, keep a small amount of the original clean solution in a glass and then compare the spend cleaning liquid with unused cleaning liquid to see the difference. The spent liquid should be foggy/muddy compared to the clean stuff and if you let it sit, the scale will settle to the bottom of the glass and will be clearly visible. You can prevent some of the buildup in your machine by using filtered water as they do at Starbucks.
Posted on Jun 05, 2009
It's the hose from the steam boiler to the upper boiler. Part number 16000190 Silicone Tube 4,2X8,2. It is the same tubing as you would find on a fish tank with a red woven cover - I guess to prevent leaks. I cut out a short section that had developed a hole because it is not designed for the heat and pressure, but it shortly started to leak again. The tubing is not the correct kind for this purpose.
Now i am trying to find where to get a replacement tube without having to send it off someplace.
Posted on Sep 10, 2009
Tips for a great answer:
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There are many possible points that the leak can be.
All points of the water supply from water tank to the pressure pump then to boiler and finally to coffee group. All this are connected together with plastic or Teflon pipes with easy fit unions secure with clips
You need to disassemble the machine and work it without the side panels of course with extra care since power electrical cables are exposed.
In this way with a very good visual check while the machine is in operation you can identify the leaking point and fix it.
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