In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Anyone have any detailed info about this unit? Was part of the Dunham Differential Heat System from late 20's til around WWII. Have red the Dunham info on this site, 414 etc...Cant seem to find any specifications other than it was designed for total EDR of 2K ft. Are there any available? Are there equivalent Jet vacuum pump from other manufacturers for a small pump...Hoffman? Thanks!