Fitting installation completed. Tanks leak checked.
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Welded fittings on the 18 gallon and 6 gallon tanks.
The 6 gallon tank is just over 3/16" thick.
I capped a couple of short 1.5" PVC pipes and attached them to the tanks. This will be same manner in which the tanks and plumbing will be connected when installed in the trailer frame. I then filled each tank with water to leak check each fitting and pipe connection. No leaks were found at either the fitting welds or at the rubber boots used to attach the pipes to the tanks.
That's all for today.