Veggie, did you MIG weld or braze those 2 inch exhaust pipe joints to the tanks?
Your simple side entry method seems highly effective, and the use of air tanks avoids the safety "pucker factor" of welding old propane tanks. Bravo!
BruceM
Yes, holes were cut in the ends and the sides of the tanks then Weld-On thread couplings were MIG welded in place.
The weld-on threaded "bung" fittings can be sourced at "Princess auto" in Canada and Harbor Freight in the USA (See picture).
There are several variations of threaded bung but they all work.
- 2" to joint the two tanks
- 1.5" for the inlet and discharge (However, 2" may have been better for reducing back pressure)
Then a short threaded pipe nipple was used to screw the two tanks together. It can all be dismantled if necessary.
Cheers