Purchased last year and used for less than a month before we got our central vacuum system plumbed in and hooked to everything. All of them work fine only issue is one has a burnt out status light if I get time I’ll replace that before sale.
Exact same as these, though we purchased from a different seller, these were packaged with our rotovaps all of which are 50L units https://www.usalabequipment.com/usa-lab-shb-595a-recirculating-water-aspirator-vacuum-pump-98l-min/
Asking $300/ea OBO will discount for purchasing more than one. Can deliver with my truck as needed if you’re reasonably close to Denver. Cash or Paypal if you pay the fee, will not ship.