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Drip Coffee Filter Drainage Issue

Posted on 7/24/16 at 9:41 am
Posted by 3rdShore
Coast
Member since Nov 2014
61 posts
Posted on 7/24/16 at 9:41 am
TL;DR version:
My coffee filter basket is slow to drain/will stop draining without encouragement. What could be the reason?


I currently use a Bonavita drip coffee brewer for routine coffee brewing. I use the Bonavita recommended Melitta #4 cone filters, and have used them for years with no issues. I also use a Breville Smart Grinder Pro burr grinder to grind the beans.

Just recently with a certain light roast bean I've been having issues with the coffee not draining out of the filter basket in a timely manner. I have to agitate the filter basket and it will drip for a few more seconds then stop again.

I've increased the grind size relative to what I normally do, and it hasn't improved. I've also verified the drain hole is not clogged preventing good flow.

Any ideas what could be causing this? Can the beans be roasted in a way that makes them more likely to clog? Faulty filters? It seems to only be with this particular coffee bean...

Also, any good recommended message boards that are coffee specific for further coffee enlightenment.
Posted by LSUballs
RayVegas LA
Member since Feb 2008
37765 posts
Posted on 7/24/16 at 10:06 am to
When that happened to me it was because of my tap water. Started using bottled water and it worked fine. Granted this was a a hunting camp in the middle of nowhere that had a pretty crappy water system. But I might buy a gallon water jug and try it
This post was edited on 7/24/16 at 10:20 am
Posted by 3rdShore
Coast
Member since Nov 2014
61 posts
Posted on 7/24/16 at 10:43 am to
Thanks for the idea. I'm using our filtered water from the refrigerator, so don't think that's the issue.
Posted by Zappas Stache
Utility Muffin Research Kitchen
Member since Apr 2009
38723 posts
Posted on 7/24/16 at 10:55 am to
We had that issue with a coffee maker a few years ago.....maybe 2 makers. Never found a solution. Finally convinced me to start using a coffee press.
Posted by 3rdShore
Coast
Member since Nov 2014
61 posts
Posted on 7/24/16 at 9:04 pm to
Thanks for the help. Coffee press it is then.
Posted by Frankie Machine
Member since Feb 2015
86 posts
Posted on 7/25/16 at 7:41 am to
Clean your coffee maker. Monthly.
Your spray nozzle is probably plugged up.
Posted by LG2BAMA
Texas
Member since Dec 2015
1180 posts
Posted on 7/25/16 at 10:21 am to
Mix some vinegar and water and run it through a few times
Posted by Fatty Magoo
USA
Member since Nov 2015
1025 posts
Posted on 7/25/16 at 12:15 pm to
Don't be so sure... Depending on what type of filter you have in the fridge (i.e., a paper or other physical-style filter), it's really just removing any free particulates and maybe some odorous materials.

If you have particularly hard water (with high dissolved mineral content), most of your conventional water filters will do very little to remove these dissolved metals. However, if you heat this water, the minerals can settle out easily.

The simple test is to put some water in a very clean vessel to boil... see if there is any residue left. Most likely will be white residue, which probably is calcium.

It is a very common issue though... you can resolve it by using clean purchased water, or just by cleaning the coffee maker from time to time.
Posted by 3rdShore
Coast
Member since Nov 2014
61 posts
Posted on 7/25/16 at 2:06 pm to
Just to clarify, the water is dripping just fine into the basket and is pooling in the filter. There is a single opening on the basket that then allows it to drip into the carafe. This opening is wide open, so I don't think calcium deposits in the brewer itself is an issue.
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