Donaldson P550909 vs Baldwin B2-HPG: Oil Filter Compatibility
Compare Donaldson P550909 and Baldwin B2-HPG oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a 3/4-16 thread.
Quick verdict
Both use a 3/4-16 thread.
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
Donaldson P550909 and Baldwin B2-HPG specifications
How matching is scored| Specification | Donaldson P550909 | Baldwin B2-HPG |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 72 mm | 71.4 mm |
| Gasket ID | 62 mm | 62.7 mm |
| Can OD | 93 mm | 93.7 mm |
| Height | 176 mm | 137.3 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 8 |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.6 mm (Donaldson P550909: 72 mm, Baldwin B2-HPG: 71.4 mm).
Gasket ID differs by 0.7 mm (Donaldson P550909: 62 mm, Baldwin B2-HPG: 62.7 mm).
Donaldson P550909 is 38.7 mm taller (Donaldson P550909: 176 mm, Baldwin B2-HPG: 137.3 mm) -- check clearance before substituting.
Can OD differs by 0.7 mm (Donaldson P550909: 93 mm, Baldwin B2-HPG: 93.7 mm).
Bypass valve presence differs: Baldwin B2-HPG has one, Donaldson P550909 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.