Sulaiman - 1-7-2024 at 00:44
I bought one of these
Mine had a broken out barb but otherwise ok
It would be good for bubbling air etc,
good flow rate and pressure, not too noisy.
It does pull at least - 65kPa relative to atmospheric, (sea level + 25m)
but I recommend against it as a vacuum pump (for filtration) because,
the gas passes all of the internal mechanisms,
including the exterior of the motor bearing and shaft,
and passes through convoluted long narrow paths,
presumably subject to blockages.
It does work, and would probably give hundreds of hours of service if 'nasty' gasses are not involved,
which,for the cost, is ok.
My reference is a similar 12v piston pump that I've used/abused a lot.
(-80kpa new, - 70kPa now, runs for days continuously, noisy)
[Edited on 1-7-2024 by Sulaiman]