Question about Bunn NHB Coffee Maker

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OVER FLOW My Bunn seems to pump the water to fast for the filter to handle it. I have the same coffee maker at work and don't have a problem. I am using the same coffee and filters both places.

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  • Anonymous Dec 25, 2008

    Everytime we brew a pot of coffee, the filter basket overflows. how can we solve this?


  • bob5390 Jan 10, 2009

    Water comes out so fast it forces the coffee grounds up over the filter and the grounds go all over the counter and in the is getting a bit frustrating....any suggestions on how to fix?

  • tafoster2001 Feb 13, 2009

    We have had our Bunn for some time, not doing anything different, and now it is overflowing the coffee grounds when it brews. We use Bunn filters faithfully. We clean the pot regularly.

  • Anonymous Feb 28, 2009

    We use bunn filters and have an overflow problem with this unit,
    This is our thid unit and I know that the filters can be a problem.

  • Anonymous Mar 15, 2009

    Have owned 5 makers over 30 years. This one is the only one that overflows. Only thing that helps is adding the water 30% at a time over 2 minutes.



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#1 You must have the second, plastic decanter that came with previous models to do this one: slide an ice cream stick between the lid and that little plunger to hold it down. Having owned Bunns for decades an never having this problem, this is what I did.

#2 If that had not worked, I was going to use a round toothpick and break it off in a hole of the restrictor (simply unscrews) one hole at a time until I slowed the water down to sycn with the basket. However, the problem is the gushing that comes with closing the lid.

I suppose Bunn wanted to cut costs so they replaced the 2nd measuring, plastic decanter with the gate that allows you to use your same glass, serving decanter. With earlier models, you got your coffee even faster! Hope this helps. Mine stopped overflowing when I fastened the plunger down.

Posted on Mar 18, 2009

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The Bunn needs Bunn filters because they are thinner and let water through faster. The cheaper filters will overflow. Bunn's claim to fame is fast...this is just part of the fast process.

Posted on Jan 12, 2009


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1 Answer

Why does my Bunn coffeemaker spill over the filters when I use Bunn Filters.

I purchased a special flow restrictor sprayhead from because I use decaf coffee. Also if you use a finer grind then you need this to slow the water so it doesn't overflow.

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2 Answers

Keeps spilling over during brewing

These tanks can't actually be overfilled since all water poured in displaces the exact same amount of water coming out the spout. So, whatever amount of water you pour in, will be the same amount of water that flows to your pot minus the amount absorbed by the coffee grounds and filter.

Your problems sounds like an undersized (Non Bunn) filter, or clogged brew basket. To verify this, try pouring in only half the water for your brew cycle and wait for it to finish dripping, then pour in the rest. If no overflow has occurred, you simply have the wrong type of filter. If overflow begins again, you have a clogged brew basket, since no Bunn can flow too fast for the brew basket to keep up with it.

This is because Bunn filters are manufactured differently than generic store bought paper filters. They will flow faster, brew cleaner and stand up better than normal generic filters.
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They made the first, best paper filters for drip coffee pots, and all others are just generic dioxin gas producing paper.

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Over running, doesnt drain thru filter as fast as its pumping in

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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.

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