Filtrec · Filtrec elements · inline line

R221G25 filter element: specifications & equivalents

Q: What are the dimensions of the R221G25 filter element?

The published envelope is 70 mm OD × 130 mm length with a 35 mm inside diameter (2.756 × 5.118 in × 1.378 in ID). Confirm against the housing drawing before ordering.

Q: What micron rating does R221G25 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 R221G25 is a Filtrec inline-line hydraulic filter element, built with glassfiber media, sized 70 × 130 mm OD × length (ID 35 mm), rated at 22 µm absolute (β22(c)≥1000). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 70 × 130 mm

Inside diameter 35 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	70 mm
Inside diameter ID	35 mm
Length	130 mm
Integral bypass valve	none (housing/valve-dependent)
Manufacturer part no.	R221G25
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	70 mm (2.756 in)
Inside diameter	35 mm (1.378 in)
Overall length	130 mm (5.118 in)

All 70×130 mm interchange elements →

Cross references & equivalents

Equivalent model	Brand	Match level	Note
↔ C10003 page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps DONALDSON C100.03 to FILTREC R221G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ CU100A25N	MP Filtri	full	Filtrec's official Cross Navigator maps MP FILTRI CU100A25N to FILTREC R221G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ 51167	WIX Filters	partial	Filtrec's official Cross Navigator maps FILTER MART 51167 to FILTREC R221G25 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade. Rated micron differs (7 vs 22 µm) — verify efficiency class and collapse/seal for the housing 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 R221G25 model number is decoded

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

Typical equipment & applications

Filtrec aftermarket replacement hydraulic/lube filter element (R 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 R221G25 filter element?

The published envelope is 70 mm OD × 130 mm length with a 35 mm inside diameter (2.756 × 5.118 in × 1.378 in ID). Confirm against the housing drawing before ordering.

What micron rating does R221G25 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 R221G25 filter element?

2 catalog-confirmed full match(es) (C10003, CU100A25N); 1 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 19 catalog element(s) share the 70×130 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

R221C10 Filtrec · 10 µm R221C25 Filtrec · 25 µm R221G10 Filtrec · 12 µm R221T10 Filtrec · 10 µm R221T125 Filtrec · 125 µm R221T25 Filtrec · 25 µm R221T60 Filtrec · 60 µm S121C10 Filtrec · 10 µm S121C25 Filtrec · 25 µm S121G03 Filtrec · 5 µm

Other models in the Filtrec elements series

All 9874 (list page 9/20) →

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.