ElementRef

MANN-FILTER · HD / WD Hydraulic · inline line

HD725/1 filter element: specifications & equivalents

The HD725/1 is a MANN-FILTER inline-line hydraulic filter element, sized 69 × 175 mm OD × length (ID 34 mm). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 69 × 175 mm
Inside diameter 34 mm
Line type inline
Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-09-28. Confidence score 0.92.

Dimensions and comparison numbers are taken from the MANN-FILTER online catalog API. Beta rating, collapse pressure and seal material vary by execution — verify against the current MANN data sheet before ordering.

Specification table

ParameterValue
Filter type inline line
Outside diameter OD 69 mm
Inside diameter ID 34 mm
Length 175 mm
End caps open-ended cartridge element
Integral bypass valve none (housing/valve-dependent)
Manufacturer part no. HD725/1_MANN-FILTER
Source catalog MANN+HUMMEL / MANN-FILTER: MANN-FILTER online product catalog GraphQL API (mann-filter.com, store pcat_mf_en_store_en)
Last verified2026-09-28

Sources: MANN+HUMMEL / MANN-FILTER — MANN-FILTER online product catalog GraphQL API (mann-filter.com, store pcat_mf_en_store_en) — accessed 2026-09-27.

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

Dimensions & series range

Outside diameter69 mm (2.717 in)
Inside diameter34 mm (1.339 in)
Overall length175 mm (6.890 in)

All 69×175 mm interchange elements →

Cross references & equivalents

No catalog-verified cross references yet. This model is in the manual verification queue — request a verified equivalent.

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.

How the HD725/1 model number is decoded

  • HD725/1MANN-FILTER hydraulic cartridge element part number.
  • 175 mmElement height (H).
  • 69 mmOuter diameter (A).
  • 34 mmInner diameter (B).

Typical equipment & applications

  • Replacement element for OEM hydraulic filter housings

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.
  • Nitrile (NBR) seals are standard for mineral hydraulic oil but fail early in some phosphate-ester fluids and at sustained high temperature; verify seal compound against the fluid data sheet (fluorocarbon/Viton executions may be required).
  • End-cap geometry and the number/position of O-rings block interchange even when OD and length match — visually compare end caps before fitting, especially with aftermarket cartridges.

Frequently asked questions

What are the dimensions of the HD725/1 filter element?
The published envelope is 69 mm OD × 175 mm length with a 34 mm inside diameter (2.717 × 6.890 in × 1.339 in ID). Confirm against the housing drawing before ordering.
What replaces the HD725/1 filter element?
Cross references are being verified for this model — use the inquiry form and the engineering desk will confirm equivalents.
How do I read the HD725/1 part number?
See the designation decoder above: each segment of HD7251 encodes size, line type, filtration grade and media/collapse execution.
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.
How often should a hydraulic return-line element be replaced?
Replace at the housing manufacturer’s recommended differential-pressure setting (commonly signalled by a clogging indicator), or on a time-based service interval when no indicator is fitted — never wait for bypass to open continuously, because unfiltered oil then reaches the valves.

Same-envelope elements from other brands

View full interchange →

These 56 catalog element(s) share the 69×175 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

HF29050 Fleetguard HF29135 Fleetguard · 200 µm HF6871 Fleetguard · 6 µm HF6872 Fleetguard · 10 µm HF6873 Fleetguard · 17 µm 0240 D 001 BN4HC HYDAC · 1 µm 0240 D 003 BH4HC HYDAC · 3 µm 0240 D 003 BH4HC /-V HYDAC · 3 µm 0240 D 003 BN/AM HYDAC · 3 µm 0240 D 003 ECO/N HYDAC · 3 µm

Other models in the HD / WD Hydraulic series

All 880 →
HD10001 103×482 mm HD10002 99×177 mm HD10004 99×141 mm HD10006 99×155 mm HD10007 99×218 mm HD10008 99×218 mm HD10011X 99×210 mm HD10012X 99×330 mm HD10013 100×438 mm HD10014 99×155 mm

Reviewed & verified by the ElementRef engineering desk against MANN+HUMMEL / MANN-FILTER on 2026-09-28. Read our editorial & correction policy.