Harvard 1004 Replacement Water Filter - Premium Carbon Filtration System for Clean Drinking Water - Perfect for Home, Office, and RV Use

We have always used the Harvard 1004 and it's worked well in our unit. Pump motor is 3/4 H.P. and has always had enough power to push ISO 46 hydraulic fluid through it. The killer filter was so restrictive it took 4 hours to pump/filter 55 gallons of hydraulic oil through it. Normally would take about 45 minutes to an hour.Bottom line, it is definitely not an Harvard 1004 equivalent. Perhaps it works in other units, but ours is a Harvard unit and is in good working order.The killer filter is also $75.00 more expensive than the Harvard. I can't recommend it as an replacement/equivalent for the Harvard 1004. Sorry.