Ultra-Filtration & Gravity
27 articles
Identifying Chemical Degradation of UF Membrane Materials
Ultrafiltration hollow fibers are constructed from synthetic polymers designed to withstand hydraulic stress and periodic chemical…
Why Your UF System Needs a “Pre-Strainer” (The Lifetime Diagnostic)
Ultrafiltration (UF) hollow-fiber membranes use microscopic pores between 0.01 and 0.02 microns to stop bacteria, cysts,…
The “Gravity Head” Calculation: Why 2 Feet of Height Isn’t Enough
A common mistake in off-grid water setups is attempting to feed an ultrafiltration (UF) module using…
Troubleshooting “Cloudy” Water After a UF Backwash
Performing a backwash or forward-flush on an ultrafiltration system is standard maintenance to discharge trapped sediment…
Diagnostic: Why UF Water Still Tastes Like the Source
Ultrafiltration (UF) systems use hollow-fiber membranes with pore sizes between 0.01 and 0.02 microns. This physical…
Why Your Berkey-Style Carbon Elements Are Pitted
Pitting on Berkey-style black carbon elements looks like small craters, gouges, or a pockmarked, crumbly surface…
Troubleshooting the “Dead-End” Filtration Loop
In a dead-end ultrafiltration system, all incoming feed water is directed against and through the hollow-fiber…
The “Bubble Point Test”: Surgical Integrity Check for UF
Ultrafiltration relies on 0.01-to-0.02-micron hollow fibers to establish a mechanical barrier against bacteria, cysts, and suspended…
Identifying “Biological Fouling” on UF Fibers
Ultrafiltration (UF) hollow-fiber membranes strip bacteria, parasites, and fine particulates from raw water, but their tight…
Forward-Flush vs. Back-Flush: UF Maintenance Diagnostics
Selecting between a forward-flush and a back-flush for an Ultrafiltration (UF) system depends on whether contaminant…
Troubleshooting Low Flow in 0.01 Micron UF Systems
Low flow in a 0.01-micron Ultrafiltration (UF) system is primarily caused by membrane pore blinding, where…
Why Your Gravity Spigot is Leaking (The “Washer Crush” Fix)
A leaking gravity filter spigot is almost always caused by over-tightening the spigot nut rather than…