When you're building out a filtration separation station, the first decision isn't which brand to buy-it's whether you need the vessel or the replaceable media that goes inside it. A bag filter system works by pushing liquid through a fabric sock held inside a housing, and your starting point depends on what you already own. The price spread between these two approaches is $234, with the sewn filter sock lot at the lower end and the bag filter housing at the upper end. That spread frames the tradeoff: are you replenishing a system you already own, or acquiring the core vessel?
Quick verdict
If you already have a housing that takes these socks, the Duda Energy Sewn Industrial Filter Sock Bags are the practical buy: you get a large lot of new media for the lower end of the spread. If you need the vessel itself, the Filtra Systems FSC Bag Filter Housing is the component to build around.
Comparison at a glance
| Product | Listed Price | Price Bar | Key Spec |
|---|---|---|---|
| Sewn Industrial Filter Sock Bags | $316.00 | Size #4, 0.5 micron, 50-count lot | |
| Filtra Systems FSC Bag Filter Housing | $550.00 | 304 stainless steel, 150 PSI, single basket |
Where each product wins
- Go with the sewn filter sock bags when your bottleneck is consumables and a compatible housing is already in place.
- Go with the Filtra Systems housing when you need the vessel itself and plan to pair it with filter socks.
Product notes
Sewn Industrial Filter Sock Bags
The sewn filter sock bags give you a disposable media solution for a bag filter housing. They're listed in Size #4 (4" x 14") with a 0.5-micron rating, so they're suited to capturing fine solids from liquids like biodiesel, water, waste vegetable oil, dust, and diesel. The condition is new, and the lot provides a full supply of socks for ongoing changeouts. Choose this option when your housing is already in place and you want a media stockpile rather than another piece of equipment. The limitation is that this is purely consumable: without a compatible bag filter housing and basket, these socks have no place to work, and the single listed size and micron rating mean you're committing to that specific filtration profile.
Filtra Systems FSC Bag Filter Housing
The Filtra Systems housing is the hardware side of a bag filtration system. It's built from 304 stainless steel and rated for a maximum working pressure of 150 PSI, with a single basket / bag support basket that accepts one filter bag at a time. The unit is intended for process liquids including water, coolant, and oil, and the stainless construction suits industrial service. Its condition is used, so you're getting a serviceable vessel rather than a brand-new unit. The limitation is that it only holds a single bag, so higher-flow operations may need multiple housings or a larger system; you'll also need to pair it with filter socks of the correct size.
Final choice by use case
- If you already have a bag filter housing that takes a standard sock, choose the sewn filter sock bags: you're buying a large replacement lot of new media.
- If you don't yet have the vessel, choose the Filtra Systems housing: it gives you a stainless steel, pressure-rated bag filter housing to build around.
- If you're starting from nothing, the housing comes first; the sock bags become your follow-up purchase once the vessel is installed.
Either way, these two products complement each other in a complete setup, so the right answer depends on what you already have on hand.
