3M Purification / CUNO High-Flow Filter Replacement
3M Purification (formerly CUNO) offers several high-flow filter series: the 740B/K series with 6.5" OD and the HF series with a standard 6" OD for broad housing compatibility. R+F FilterElements supplies dimensionally matched replacement elements for both lines.
R+F FilterElements is an independent supplier of compatible replacement elements. 3M Purification / CUNO brand names and part numbers are used for identification only — these are not original 3M Purification / CUNO products.
Series
OEM Numbers
| OEM | Length | Micron Rating | Media | Status | |
|---|---|---|---|---|---|
| 740B30PP001A1 | 30" | 1 µm | PP | Verified | View replacement → |
| 740B30PP001D1 | 30" | 1 µm | PP | Verified | View replacement → |
| 740B40PP002C1 | 40" | 2 µm | PP | Verified | View replacement → |
| 740B40PP005D1 | 40" | 5 µm | PP | Verified | View replacement → |
| 740B40PP010D1 | 40" | 10 µm | PP | Verified | View replacement → |
| 740B40PP025D1 | 40" | 25 µm | PP | Verified | View replacement → |
| 740B40PP040B1 | 40" | 40 µm | PP | Verified | View replacement → |
| 740B40PP070D1 | 40" | 70 µm | PP | Verified | View replacement → |
| 740K40PP005C1 | 40" | 5 µm | PP | Verified | View replacement → |
| 740K40PP010D1 | 40" | 10 µm | PP | Verified | View replacement → |
| HF40PP001A01 | 40" | 1 µm | PP | Verified | View replacement → |
| HF40PP005A01 | 40" | 5 µm | PP | Verified | View replacement → |
| HF40PP010A01 | 40" | 10 µm | PP | Verified | View replacement → |
| HF40PP040A01 | 40" | 40 µm | PP | Verified | View replacement → |
| HF60PP001A01 | 60" | 1 µm | PP | Verified | View replacement → |
| HF60PP005A01 | 60" | 5 µm | PP | Verified | View replacement → |
| HF60PP010A01 | 60" | 10 µm | PP | Verified | View replacement → |
Frequently Asked Questions
Is the 3M 740B series compatible with standard 6" housings?
No, the 740B/K series has a 6.5" OD and does NOT fit standard 6" housings. Please verify housing compatibility.
Does R+F offer replacements for the 3M HF series?
Yes, the 3M HF series (6" OD) is fully compatible with our standard high-flow filter elements.
Request a matching replacement
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