The Castair EK602VB is the replacement filter element for the Castair FS114 and FS112 particulate filter bodies — the 1-1/4" and 1-1/2" NPT standard-size inline air filters in Castair's FRL (Filters, Regulators, Lubricators) lineup. When the filter element inside your FS114 or FS112 filter bowl becomes loaded with particulate — metal fines, pipe scale, rust particles, compressor wear debris — the element needs to be replaced to restore full flow and filtration effectiveness. The EK602VB is the correct OEM element for these bodies; using a non-matching element risks either bypassing filtration (if the element doesn't seal the bowl correctly) or restricting flow more than necessary.
Compatible Filter Bodies
The EK602VB fits these specific Castair filter housings from the 7000 series:
- FS114 (1-1/4" NPT): 250 PSI max, 390 CFM, 16 oz bowl capacity — the 1-1/4" standard particulate filter in Castair's FRL catalog
- FS112 (1-1/2" NPT): 250 PSI max, 390 CFM, 16 oz bowl capacity — the 1-1/2" standard particulate filter
Do not use the EK602VB in other Castair filter bodies. Castair's filter element catalog lists specific elements for each filter body size — using the wrong element in a filter housing can result in bypass (the element doesn't seal, so unfiltered air passes around it) or an element that won't seat correctly in the bowl.
Filter Performance Context
The FS114 and FS112 bodies are 5-micron particulate filters. At 5 microns, they capture:
- Rust and pipe scale particles
- Metal wear particles from compressor internals
- Scale and debris from aging distribution piping
- Bulk liquid water droplets carried in the air stream
These filters are the first line of defense in a compressed air treatment system, positioned downstream of the tank and before any regulators, lubricators, coalescing filters, or air tools. A clogged element increases pressure drop across the filter, which means lower working pressure at the point of use even if your compressor is delivering full tank pressure. Replace the EK602VB element when you see increased pressure drop (check pressure before and after the filter with gauges) or on a regular maintenance schedule based on your system's particulate load.
Castair Filter Element Cross-Reference
For reference, here are the correct elements for other Castair filter bodies — confirm you have the right element for your housing:
- C-FM14 (1/4" mini): Use C-F2
- C-CF12 and C-CF34 (coalescing, 1/2" and 3/4"): Use C-F7 (7000 series) or C-F7607
- C-CF10 (coalescing, 1"): Use C-F9 or C-FM907
- FS114 and FS112 (particulate, 1-1/4" and 1-1/2"): Use EK602VB (this element)
What's in the Box
- One (1) EK602VB replacement filter element
Note: Exact filtration rating, element dimensions, and change interval recommendations are not published in Castair's public catalog for this specific element. Contact us for guidance on replacement intervals based on your system's air quality and usage.
When to Replace the Filter Element
- Measurable pressure drop: If you have gauges before and after the filter, replace when you see more than 5 PSI differential at normal flow rates
- Visible contamination in the bowl: Excessive liquid accumulation or visible particulate buildup in the bowl is a sign the element is near or past capacity
- Scheduled maintenance: In high-particulate environments (heavily rusted piping, frequent air tool use), plan for more frequent element changes
- After system contamination events: If a tank check valve failed and backflow occurred, or if a compressor oil separator failed, inspect and likely replace the element
Where These Filters Fit in Your System
The FS114 and FS112 filters using the EK602VB element are large-port filters — 1-1/4" and 1-1/2" NPT — which means they're used in higher-flow sections of the compressed air distribution system. At 390 CFM each, these are appropriate for:
- Main header supply lines feeding multiple drops
- Large shops with multiple simultaneous air tool users
- Upstream of large air-powered equipment (paint booths, plasma cutters, large pneumatic actuators)
- Upstream of refrigerated dryers or coalescing filters that require pre-filtration
Why Buy From Air Compressor Factory Direct?
- Specialist since 2016 — we stock Castair FRL consumables and can confirm you're getting the right element for your filter body
- Free shipping on qualifying orders
- Free tech support at 866-217-0063 — call us if you're not sure which element fits your filter housing
- Full manufacturer warranty on Castair parts
- Honest guidance — we'll tell you if you need a different element or if it's time to upgrade to a coalescing filter for your application
Call 866-217-0063 for quick answers and help!
