i personally dont think it is.i like the idea of the (lab grade)pump pulling solvent back and out of the chamber.what is going on inside the chamber holding vac after you shut the pump off? where is the solvent going? evaporating?bouncing around only to fall back onto the extract? i do not follow or subscribe to that thought process.i also dont like pumps that need oil.the pos best valu pump i had got hot af and SMOKED like a mofo.i dont want that running inside my home or something volatile like etoh mixing with the oil.to each their own,im not an expert either,but i will probably never use an electric vac pump that uses oil,ever again