Make sure you have no airlocks, hahaha
Type: Posts; User: Maca49
Make sure you have no airlocks, hahaha
My dad made a 1/2” copper coil about 4 foot long to fit in an 8” flue to heat water using the sand. He was one clever bugger. Fitted to a small chip heater, fired with waste oil. Emery thing glowed...
Make sure the sand is DRY:)
You can fill it with sand and heat and bend, or use a plumbers spring if yo can find one of that diameter