The sock filter — clean white mesh bag with elastic rim, shown alongside the fill port opening it covers. Simple, practical, unglamorous, effective.
New filter vs. used filter after one pipa delivery — the brown/gray sediment captured in the used filter is the visual proof.
Cistern Inlet Sock Filter
Filtro de Calcetín para Entrada de Cisterna
The one fix that changes everything
100-micron reusable mesh filter bag that fits over your cistern fill port. Catches sand, silt, rust, and particulates during every pipa delivery — preventing the sediment that destroys pumps, scales appliances, clogs filters, and shields bacteria. 10-minute installation. No tools. The single highest-ROI intervention in your water system.
Specifications
- Filtration
- 100 micron mesh
- Material
- Food-grade stainless steel mesh
- Fits
- 3-inch and 4-inch fill ports (specify when ordering)
- Reusable
- Yes — rinse after each use, replace annually
- Flow Restriction
- Minimal — adds <2 minutes to standard pipa fill
What's Included
- Reusable stainless steel mesh sock filter
- Elastic securing ring
- Installation instruction card (EN/ES)
Why This Is Product #1
Every article on this site points back to the same first step: filter sediment at the inlet. This is that filter.
It’s not sophisticated. It’s not expensive. It’s a mesh bag. But it intercepts 60-80% of incoming sediment before it enters your cistern — preventing the entire Sediment Multiplier cascade at the source: bacterial shielding, pump wear, appliance scaling, taste degradation, and filter clogging.
Annual ROI: 10-30x the purchase price in prevented downstream damage.