Ultra-Filtration & Gravity
27 articles
How to Test Gravity Filter Flow Rates (The “Graduated Cylinder” Test)
Gravity-fed hollow-fiber and ceramic purification setups are ideal for remote cabins, off-grid homsteads, and base camps…
Diagnostic: The “Iron Crust” on UF Fiber Headers
Hollow-fiber ultrafiltration modules rely on dense bundles of microscopic tubular membranes cast into epoxy potting blocks…
Why Your UF Waste Line is Running Constantly
An ultrafiltration (UF) system purifies water down to 0.01 microns using hollow-fiber membranes. While reverse osmosis…
Troubleshooting the “Automatic Level Control” in Gravity Arrays
Gravity-fed water systems often link multiple storage tanks, cisterns, and filter chambers using non-electric level controls.…
Identifying “Vitreous” Cracks in Ceramic Filters
Ceramic gravity filters rely on dense, micro-porous walls of diatomaceous earth or fired clay to physically…
Why Your UF System “Burps” Air During High Usage
An ultrafiltration (UF) system that spits, gurgles, or “burps” air at the faucet during high water…
How to Unclog a UF Membrane Using “Surgical” Chemical Soaks
When an ultrafiltration (UF) hollow-fiber membrane fouls, mechanical forward-flushing and back-flushing are the first line of…
Troubleshooting “Slow Drip” in Ceramic Gravity Elements
When a ceramic gravity water filter slows to a faint drip, the system is struggling against…
Diagnostic: Is it Silt or Bacteria? (The UF Performance Test)
When water production through an ultrafiltration system drops sharply, the membrane pores are blinded by accumulated…
How to Repair a Leaky Bulkhead Fitting on a Gravity Tank
A leaking bulkhead fitting on an off-grid gravity tank wastes stored water, creates slip hazards, and…
Why Your UF Controller is Stuck in “Flush Mode”
An automated ultrafiltration controller is designed to periodically switch valves to flush accumulated surface solids from…
Troubleshooting Manual Hand-Pumps Integrated with UF
Integrating a manual hand-pump with an ultrafiltration (UF) hollow-fiber membrane gives you water security when the…