How to stop the Blue Bunting 28 oz glass hummingbird feeder from leaking like a sieve

Feeder with base cover offThe birds really love this feeder. “Love,” though, is a gross understatement. They become violent, vicious, winged beasts fighting to access this feeder and fly right past other styles of feeders to get to it. But they tend to leak. Below is the solution to losing all your solution.

Some people have suggested latex gaskets or washers to stop the leaking on the 28 oz glass Blue Bunting hummingbird feeder from Walmart (see listing here), but I found those fixes unnecessary.

Update 2017: Paul suggests the following in a comment, and this may be the fool-proof, total fix:

“A 50 cent hardware store plumbing department 1 x 3/4 x 1/8 #15 o-ring placed on the neck of the bottle did the trick for me. No more leaks out of the snap together joint and you can tilt it pretty far before fluid comes out of a flower.”

In 2016 I switched all of my feeders over to a wide-mouth bottle that is easier to clean and has a circular perching ring around the entire bottle that seats more hummers. We sometimes see 22 to 25 Anna’s hummers sitting shoulder-to-shoulder taking turns on the nectar ports. It is the “First Nature 3055 32 oz feeder,” which is available at Amazon for about $10.10 each or a 2 pack for $18.36 at this time. You can search for it or here’s a link:

Now back to our original blog post:

I did some basic investigation with the base off and the feeder hanging over my kitchen sink, while a strong breeze whistled through the open window, as you can see in the image at left.

The primary problem seems to be that the threads on the bottle are large and are prone to misthreading, but without seeming misthreaded. This is much more likely if the feeder bottle, base, or nectar are hot or even just warm.

The second issue is that the red hanger included with the feeder may cause it to hang at an angle. Even a slight misalignment, making the feeder unlevel, will cause the feeder to overfill and eventually leak. Blowing winds may also cause the feeder to become unlevel, overfill, and leak.

1. Be extremely careful when screwing the bottle onto the base. It is very easy to misthread this feeder without noticing it and without the feeder appearing to be misthreaded. When misthreaded the vacuum seal is broken and the base overflows.  If you see continuing bubbles after turning the feeder right side up and the base fills and leaking begins then take the feeder down, invert it again, and rethread it. When properly threaded you will only see bubbles inside the bottle when first turned upright, until the base fills, and then when the birds drink enough nectar that the base refills. Never use warm or hot nectar and never fill it until the feeder is completely cool! See #2, below.

2. Only ever use cold nectar when you fill the feeder and only ever fill the feeder when all parts of the feeder are cool. If you’ve just cleaned the feeder with hot water then run some cold water on it before filling. The threads on the feeder are large and easily misthreaded anyway. If the feeder is still warm from cleaning or the nectar is warm (or worse, hot) deformation of the plastic base and misthreading become even more likely. Always fill a cold feeder with cold nectar.

I use two items to clean my feeders. For the inside I use a metal stick with sponge strips attached, like the “Perky Pet 23T Bird Feeder Foam Cleaning Mop,” which has apparently and inexplicably been discontinued by the manufacturer. Boo! Be sure to crimp the metal tighter around the sponge bits). For the flowers, the nectar outlets, the base, and the exterior I use a typical two-part baby bottle and nipple brush combo, with a large scrubber on one end and a detachable small brush on the other end. I also remove and discard the little cage-like yellow insect guards because they get a buildup of dirt and nectar and really don’t keep insects out anyway.

3. Use only a metal “S” hook (not included with feeder) to suspend the feeder, so the feeder hangs level. If the feeder is not level the nectar can overflow on one side of the base. Do not use the red coated wire included inside the bottle to hang it up. The red wire can cause the feeder to hang at an angle, overfill, and leak nectar.

4. Hang the feeder where it will not be buffeted by wind. When wind blows on the feeder it can cause the feeder to become un-level, allowing the base opening on one side to be exposed, break the vacuum, overfill and cause leakage.


As you can see in the image at left, nectar normally only fills the base to a depth of about a 1/4 inch high. Unfortunately, if the feeder hangs at an angle or strong winds buffet the feeder about then the base opening is exposed, the vacuum seal gets broken, the base overfills, and it eventually, usually slowly, overflows. Conversely, if the bottle and base are misthreaded then the vacuum seal is broken and the base overfills and then nectar is constantly released into the base, usually causing fairly rapid loss of fluid.

*** The feeder may also become vacuum locked, so that no fluid descends into the base unit and the sweet little birdies cannot access their life-sustaining beverage. Sometimes this happens because the bottle is overly full, or because of internal construction misalignment, or atmospheric pressure is not cooperating with you, or because dirt from the hummer’s beaks has combined with the sticky nectar and blocked one or more ports. I never had this problem with my older Blue Bunting feeders. I bought two new feeders this year as spares (some of the flowers were cracking on my old units) and between a couple of mishaps I wound up using these. I don’t know whether it was something new they did to the build, or whether we’re just getting more pressure changes. If you can see grimy build-up on the ports then give them a good scrubbing. If the feeder is locked up due to atmospheric pressure or build, tilt it to one side until nectar spills out one of the ports. You may have to do this more than once to fix the problem.


13 thoughts on “How to stop the Blue Bunting 28 oz glass hummingbird feeder from leaking like a sieve

    • The problem is not cross-threading, atmospheric pressure fluctuations or strong winds. It’s a poorly designed threading system that doesn’t adequately seal. Any movement, tilt or pressure change allows air to enter the bottle and fluid to overflow the bottom. Remove the top red snap-on ring and the bottle screws in further, allowing it to seal. Unfortunately, this exposes the nectar to the elements and insects. I tried this on 2 units with identical results. The gasket idea sounds good, but why should we have to “fix” a brand new unit? This is a sloppy design and I would think the manufacturer is aware of this defect but just doesn’t care. The best fix is to return it and buy a well designed unit from a different maker. Signed Sick of Schlock

  1. The problem is a decrease in atmospheric pressure due to a low pressure weather system moving in. This causes a higher pressure in the bottle to push fluid out of the feeder holes. That is why it leaks.

    • Hi Priscilla! I’m sorry to hear your flower broke.

      I’ve had some success with the Gorilla Glue product for plastics (the one like Krazy Glue, not the regular glue form). I ended up buying 2 spare feeders in this model and switching out parts, including the flowers, as they broke.

      I do have spare flowers from my retired Blue Buntings. If you’d like I can send you a couple. You can put your mailing address in a replying comment and I won’t publish it and can delete it after I’ve mailed the flowers, if you like. 🙂

      This last February I switched out all of my Blue Buntings for feeders from First Nature because there are more ports, the flowers are part of the base (so no removing and washing and no yucky bird schmunch build-up or mildew areas and no possibility of breaking or losing), and the opening for the bottle is large enough to fit my normal kitchen sink scrubber in. Much as I loved the Blue Buntings they were difficult to get and keep clean. The birds don’t seem to mind the change too much either. I’ve been very pleased with the performance of the First Natures. Apparently you can switch the bottle out for a much larger container, but I haven’t tried that yet. Here’s the listing for the model I got:

    • Hi Jennifer! I bought all of my Blue Bunting feeders at Walmart.
      I switched over to the First Nature square feeders recently and I actually like them a little better. See my comment to Priscilla on this page about them.

  2. A 50 cent hardware store plumbing department 1 x 3/4 x 1/8 #15 o-ring placed on the neck of the bottle did the trick for me. No more leaks out of the snap together joint and you can tilt it pretty far before fluid comes out of a flower.

  3. I just got one of the 28 oz feeders and hung it up yesterday-this morning I found it on the ground-glass broken-it evidently unscrewed itself from the red hanger portion, because that was still hanging on the shepherd hook-very disappointed in the design. Will not buy again.

    • Yikes! Sorry to hear that happened, Carol. I think I’d let the company or store where you bought it know and see if they’ll replace it. I switched over to the First Nature 3055 32-ounce Hummingbird Feeder (bought on Amazon) a few years back, because they are easier to clean and all plastic. They do get vacuum locked a bit though because of the design – I have to tilt them to remove bubbles, so the nectar flows, which is sometimes a hassle.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s