A Better Pre-Port Tube for a Batch Box

Hey Permies!  I updated the pre-port page at my stove site, and have a new method I'd like to share with you all.  More info here:

http://walkerstoves.com/walker-pre-port-secondary-air-tube.html

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Brilliant! Thanks! I was already noticing premature decay of my secondary air tube in a ceramic board batch box after just a few fires (one of which I admittedly allowed to get way too hot.)

Another great upgrade,shared freely. Amazing.

Do you still slot the tube?

Thank you both for the kind words.  William, I have not slit these. I suspect they are more durable as a complete pipe, perhaps with a small performance trade off. Needs to be A/B tested to know for sure. I might get to that this winter.

Ah! Well, easy to cut a slot, hard to undo.
I hope to try for myself one day soon.

If you let the top rim remain intact then start the slot about a half inch or more down from the top rim, it might serve as a viable compromise for longevity. I just ordered one and I’ll try both. Also I think cutting it on a slant might help too?

Another option: 1.67” diameter marine grade 316 stainless tubing and separate mount. The tube can easily be removed from the stainless steel flange base and replaced if/when it eventually burns out. Steel tube thickness is 2mm/ 14 Gauge. (It’s simply marine grade handrail tubing and hardware.)