If your thinking of making one of these be very aware of the point he makes about not overtightening the wingnut, and in general be very gentle with the filters.
They are very delicate, and also heavy. They are not made to even support their own weight (especially once primed with water) horizontally while attached with the wing nut. It will break the threaded nipple off, and ruin an expensive filter. This goes for all brands of this style of filter.
Here are some more lab test results for your viewing pleasure.
Edited by Juthro, 16 January 2018 - 04:44 PM.