We had our preheater welded to fix a leak from the ice. While checking to make sure the weld was complete we found a small 3/8" joint which was not welded at the factory. There was a small seep. Just after wiping the water away a very fine well defined line was the point of the leak. That was welded as well. Need to drop some spin seals in and get to tapping.
We have the crust here too. Better bring you snowshoes out the same hole they went in or your going down.
Mike
Tapping since 1985 (four generations back to early to mid 1900s). 200-250 taps on buckets and then tubing in the mid 90s. 2013- 275 taps w/sap puller 25 gal. 2014-295 taps w/sap puller 55 ga. (re-tapped to vacuum theory) 2015-330 taps full vac. 65 gal, 2016-400 taps 105 gal, 2017-400 taps 95 gal. 2018-additional 800' mainline and maybe 400 new taps for a total near 800 taps. 2x6 Leader WSE (last year on it) supported by a 250 gph RO.