Filtrec · Filtrec elements · inline line

A121G25 filter element: specifications & equivalents

Q: What are the dimensions of the A121G25 filter element?

The published envelope is 129 mm OD × 229 mm length (5.079 × 9.016 in). Confirm against the housing drawing before ordering.

Q: What micron rating does A121G25 use?

This element is rated 22 µm absolute — β22(c)≥1000. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The A121G25 is a Filtrec inline-line hydraulic filter element, built with glassfiber media, sized 129 × 229 mm OD × length, rated at 22 µm absolute (β22(c)≥1000). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 129 × 229 mm

Filtration rating 22 µm abs.

Beta rating β 22(c)≥1000

Media glassfiber

Line type inline

Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-10-03. Confidence score 0.90.

Dimensions and media grade are taken from Filtrec’s official Cross Navigator, which maps this element to specific competitor part numbers. Filtrec does not publish collapse pressure or seal compound in this API for every code — verify collapse rating, seal execution and bypass setting against the current Filtrec data sheet for the target housing before ordering.

Specification table

Parameter	Value
Filter type	inline line
Media	glassfiber
Filtration rating	22 µm
Rating basis	absolute
Beta ratio	β22(c)≥1000
Outside diameter OD	129 mm
Length	229 mm
Integral bypass valve	none (housing/valve-dependent)
Manufacturer part no.	A121G25
Source catalog	Filtrec S.p.A.: Filtrec Cross Navigator
Last verified	2026-10-03

Sources: Filtrec S.p.A. — Filtrec Cross Navigator — accessed 2026-10-03.

Filtrec® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized Filtrec distributor.

Dimensional drawing

Reference drawing generated from the source values cited on this page — nominal envelope, schematic section, not a manufacturer drawing. The PDF is A3 landscape and vector; the PNG is sized for a WhatsApp preview. Confirm thread, end caps, seal compound and micron/Beta grade against the original element before ordering.

Dimensions & series range

Outside diameter	129 mm (5.079 in)
Overall length	229 mm (9.016 in)

All 129×229 mm interchange elements →

Cross references & equivalents

Equivalent model	Brand	Match level	Note
↔ 7SL130K25P page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps EPPENSTEINER 7.SL130K25P to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ 9455251465 page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps BOSCH 9455251465 to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ A05A25G page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps WIX A05A25G to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ AS602CC25B page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps FAIREY ARLON AS602CC25B to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ BT8477MPG page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps BALDWIN BT8477MPG to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ CS15000A25A page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps FAI FILTRI CS15000A25A to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ CS150A25AP01	MP Filtri	full	Filtrec's official Cross Navigator maps MP FILTRI CS150A25 to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ CS150A25AP01	MP Filtri	full	Filtrec's official Cross Navigator maps MP FILTRI CS150A25A to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ FHL4A25 page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps FBN FHL4A25 to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ YHL4A25 page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps FBN YHL4A25 to FILTREC A121G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ SFC-5825-AE	STAUFF	partial	STAUFF Filter Interchange lists A121G25 (FILTREC) as replaced by SFC-5825-AE. Envelope dimensions are published; media grade and performance data are not — confirm before substituting in cleanliness-critical circuits.
↔ WD13015	MANN-FILTER	partial	MANN-FILTER's online catalog lists A121G25 (FILTREC) as a comparison number for WD13015. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.

Interchange levels: full catalog-confirmed drop-in · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

Full chart: Filtrec cross reference chart →

How the A121G25 model number is decoded

G25Filtrec internal media grade code (glassfiber, 22 µm).

Typical equipment & applications

Filtrec aftermarket replacement hydraulic/lube filter element (A family), form-fit-function cross-referenced in Filtrec's official Cross Navigator.

Selection pitfalls — read before you substitute

“10 µm nominal” and “12 µm at β1000” can describe the very same media — one is reported at β≥200, the other at β≥1000 per ISO 16889. Compare ratings at the same Beta test point, not just the printed micron number.

Frequently asked questions

What are the dimensions of the A121G25 filter element?

The published envelope is 129 mm OD × 229 mm length (5.079 × 9.016 in). Confirm against the housing drawing before ordering.

What micron rating does A121G25 use?

This element is rated 22 µm absolute — β22(c)≥1000. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

What replaces the A121G25 filter element?

10 catalog-confirmed full match(es) (7SL130K25P, 9455251465, A05A25G…); 2 partial match(es) requiring parameter review

Is a same-envelope aftermarket element always a drop-in replacement?

No. Matching OD and length only proves the cartridge fits the bowl. End-cap style, seal compound, micron/Beta rating, collapse pressure and bypass configuration must also match; the table above tags every equivalent as full, partial or verify for exactly this reason.

Same-envelope elements from other brands

View full interchange →

These 11 catalog element(s) share the 129×229 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

A121C10/2 Filtrec · 10 µm A121C25/13 Filtrec · 25 µm A121C25/2 Filtrec · 25 µm A121G10 Filtrec · 12 µm HF29157 Fleetguard HF35455 Fleetguard · 10.1 µm HF6081 Fleetguard HF6179 Fleetguard 51256 WIX Filters · 6 µm 51493 WIX Filters · 25 µm

Other models in the Filtrec elements series

All 9874 (list page 1/20) →

A105C05 96×60 mm · 5 µm A105C10 96×60 mm · 10 µm A105C25 96×60 mm · 25 µm A105G03 96×60 mm · 5 µm A105G06 96×60 mm · 7 µm A105G10 96×60 mm · 12 µm A105G25 96×60 mm · 22 µm A105T125 96×60 mm · 125 µm A105T250 96×60 mm · 250 µm A105T60 96×60 mm · 60 µm

Reviewed & verified by the ElementRef engineering desk against Filtrec S.p.A. on 2026-10-03. Read our editorial & correction policy.