[nkaminar]

I have never experienced a anti drain back valve that I could open by blowing in the intake end of the filter. But there may be such an animal, as it seems by other's comments. I am not sure what pressure it takes to open the anti drain back valve but not 45 psi. That was just a number I grabbed out of the air for emphasis.

Regarding what hydraulic filter fits, that would depend on what hardware you are attaching the filter too. Search for hydraulic filter then match the diameters of the outer O ring and inner O ring and the thread. I ended up re threading the housing for my Model T which does not have an oil pump but relies on the flywheel slinging the oil. A fitting on the side of the flywheel housing will produce just enough pressure to flow oil through a hydraulic filter and to a fitting at the nose of the engine.