Question about Bunn B10 Coffee Maker

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Bunn B10-B leaks

I have a model B10-B Bunn coffee maker. When we put water into the top tank before closing the lid it starts leaking. I took the top screws out and removed the top reservoir.The 2 silicone and steel washers are fine. However the reservoir (plastic tub) where it is sandwiched between the washers is cracked and brittle. I am trying to find a replacement reservoir. The number stamped on it is 33514. Is that the part number?Anyway I am unable to find a replacement reservoir. I found a washer kit at marbeck.com but nothing else.Where can I purchase the reservoir? Also where can I find a parts explosion list for the unit? PDF file preferred.Thanks,Brian

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  • mmullins5020 Feb 14, 2009

    Bunn model GR10B, code date 051004. I have exactly the same problem. The plastic is totally deteriorated around the washer seals and I'm unable to find a replacement part. Any ideas?

    Thanks,
    Mike


  • mkednly Feb 21, 2009

    II have exactly the same problem, I suppose 99.9% just buy a new pot. This part should be made of aluminum or stainless. Apparently this part gets quite hot and that's the problem. Going to try to fix it with silicon, I'll let ya know. Mike

  • Anonymous Mar 11, 2009

    We have an older model with the same problem and we can't find a new water tray for it either. My husband is trying to fix it with some kind of sealer, if he can find something that is safe to fix it with.

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I used Foxhollowrun's solution and went to my local hardware store (Menard's). You can purchase 3/4" Hole Grommets typically found in the electrical department. The brand I purchased was Gardner Bender Model GHG-1575 3/4" Hole Grommets. Here is all that you need to do (very quick and easy):

1) Break away the brittle pieces from the original hole in the resevoir.

2) Remove the old rubber / plastic washers - I found I didn't need them. However, hang onto your metal washer that the drain screw goes through.

3) Slip the 3/4" grommet around the hole.

4) Place the original metal washer on top of the grommet.

5) Screw the drain screw back into the heater which will seal the grommet via pressure. Be sure not to over tighten it - I just snugged mine up.

6) Put everything back together, rinse several pots of water through it, check for leaks, and you should be good to go.

As Foxhollowrun indicated, you may need to tighten the drain screw a bit if you do have a leak. I lucked out - it worked the first time. I believe it cost me about $2 to fix. Also, I did not need any caulk. If you do use caulk, I was told you need to use food-grade caulk.

One last note - as Foxhollowrun indicated, the grommets are quick thick which is why I removed all of the old washers. The original metal washer is just thin enough to allow the drain screw to be reinstalled.

Thanks to Foxhollowrun for a great remedy!

Posted on Mar 23, 2010

  • jfretty379
    jfretty379 Jan 22, 2012

    I had to compress the grommet a bit when installing the drain screw,but your method worked a charm!
    Thanks!
    joe

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I had the same problem. I took water tank to ace with me. They have a rubber o-ring (not sure if this is proper name) but it splits around the center of the o-ring so you can work it onto the water tank. What you end up with is a gasket on both sides of the tank. It is a little thick. I then took the original threaded nut (with hole in center so water can drain into the tank) and original metal washer and secured the water tray back to the tank. I tighten a little and put water into the tank to make sure it did not leak. Mine did at first so I tightend a little more, (only a little at a time). This time it was ok. The threaded nut is not very long, so with the extra thickness of the gasket it would be nice to have a longer threaded nut. I could not find one, however the original works fine. Hope this helps out.

Jay

Posted on Aug 29, 2009

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Hi:
Unfortunately, Bunn does not put out a parts explosion list for their home brewers. As a Bunn dealer, even I can't get these, or even parts for them. This tray cracks up on a lot of these brewers, and it would be handy to have a way to get these parts. You might try getting ahold of your local Bunn repair shop, as they might have one hanging about that broke down for someother reason. Unfortunately, this is the only way that I have been able to get these trays.

Posted on Feb 24, 2009

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I went to Home Depot and got two "neoprene" washers that were two inches wide, with a 1/2 inch hole. I also got a tube of silicone adhesive/sealant. The total cost was about $7. You could get a third washer, if you want to replace the small white washer underneath. At $1 per washer, just get one more than you think you'll need to fill the gap.

Use a chisel and file to remove the remaining crumbling plastic from around the hole in the reserve tank where it's falling apart from the heat. Try to smooth and flatten the opening so that the washers will seal well. You may need to cut some excess rubber from the periphery of the washers. Mine only needed to be 1.5" wide, but a little excess won't hurt. There are some obstructions on the heating tank that you'll need to account for.

Put the trimmed washers over the drain post on the heating tank. Then, put the holding tank over them. Seal the topmost washer to the reserve tank with silicone. Make sure to push a little silicone underneath the edge of the reserve tank, to ensure a good seal. Screw the draining tube (with funnel-shaped washer) back onto the heating tank. You should allow plenty of time for the silicone to fully set. (The instructions on the tube I got said to wait 24 hours for it to fully harden.)

After it's hardened, flush the tank with about four pots of water, to make sure it's clean of any residue. Plug it in, and you're ready to go!

Posted on Jan 02, 2010

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I have the same problem. I emailed Bunn last night and received a very quick reply this morning -- they do not have replacement water trays, but they will send me an oversized gasket kit to fix the problem. As it happens, that's exactly the same solution I came up with, and I fashioned an oversized gasket out of the inner lining of a vitamin bottle top! It works, but I will replace it with the Bunn kit when it arrives.

Posted on Jul 15, 2009

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Three days ago I used silicon to repair the burned out hole area. Let it dry for about three hours and put it back together. Happy to report as of now, there are no leaks of any kind. I ran about four pots of water through it before I plugged it back in. Since then, we've been drinking coffee from a lead free pot. Think I'll pull it back apart in a few days and see if the silicon in holding up. As of now it's a cure!!!

Mike

Posted on Feb 24, 2009

  • mkednly Feb 24, 2009

    Woops! I meant to say "leak free" instead of lead free. In any case still working, I'd say it's a fix.

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Same exact problem. Fixed with home depot grommet after reading the solution by HopefulSpir. It works great. The grommet brand was Everbilt, 3/4 inch, part number 588-739 or 812048 (not sure which is the part number). I don't think this is a big concern but it does say "This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm" but I'm pretty sure water falls under the same catagory in California.

Posted on Dec 29, 2013

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