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Ok, I've got some bottles and the nipples ready. What size hole do I drill? I know that's been answered but I don't want to read 250+ posts to find the answer.![]()
I've drilled a number of plastics with the horizontal nipples and have always used 3/8" hole. It's seemed to work for me, no leaks. Because the threads are tapered, @aart is correct, don't screw in the nipple too tight. Just snug, not tight-tight. Fill it with water and check for leaks. If it leaks, you may want to either tighten or loosen it one turn to see if that makes a difference. I've never used teflon tape nor silicone sealant.
So this week was a great experiment with my new horizontal nipple waterer and freezing. The nipples themselves don't freeze because they don't hold water like the vertical ones do, but if all the water in the bucket freezes, all the way down to the nipples, they obviously don't operate. For me that temp was 15ºF on Wednesday morning. This morning it got down to 20ºF and the nipples were still working.
I'm considering investing in a stock tank de-icer to put in the bucket since I have power in the barn, but for the few days it gets below 20ºF I'm not sure it's worth it. We'll see how this Winter goes. It sure beats carrying warm water down to the coop every morning like last year!
For pretty cheap, you can get a submersible pump to circulate the water in the bucket. The moving water will help reduce the water freezing. I think someone had posted ones from Amazon that were about $8-$9. I'm not sure how cold this would work to in a 5 gal bucket, but I'm curious to try it (it get's to -10F or so here occasionally). Most people on BYC I've seen who are using a pump are also using a heater, together, which just seems overkill to me for a bucket setup. I would think keeping the water moving down to 15F might be enough, without heat, to keep your water flowing. Anyone having a more definitive answer?
Also keep in mind that a larger container will hold more heat in the water (whether you heat it or not), which will take longer to freeze. A 1-gallon bucket will freeze faster than a 5-gal one.
If you do use a de-icer, I've been very happy with this 250W (non-aluminum) one: http://amzn.com/B002QXN1H8. I have also used a submersible aquarium heater and will keep it as a back-up, but the de-icer doesn't overheat the water like the aquarium heater does. It's also designed for outdoor use, whereas the aquarium one isn't.
Edit: Here is one pump like the one's I saw referenced before: http://amzn.com/B00EWENKXO
I'm sure there is a formula somewhere where you could figure how many Gallons Per Hour (GPH) you would need pumped to keep a certain amount of water from freezing at a certain temperature. I'm not the math whiz I once was...perhaps someone would want to tackle this?
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