If you pipe it in series, it just becomes an extension of the OWB tank. keep in mind any steel vessel will be subject to corrosion on an open system. Add O2 scavenger chemicals form OWF dealers.
If the distribution side is pressurized, you will need a heat exchanger in the piping, page 20 here
https://www.caleffi.com/sites/default/files/file/idronics_10.pdf