Baldwin Filters
Baldwin Filters B7221 HVAC Control Spin-On 3/4" Thread
Spin-on oil filter with 3/4"-16 thread, 23-micron rating and built-in bypass valve
- ColorTransparent
- 23 micron rating captures fine contaminants
- 8 psid bypass valve maintains flow under pressure
- Anti-drainback valve prevents dry starts
- 3/4"-16 thread fits Lister-Petter LPA3A engines
- Compact 2-9/16" height suits tight installations
Product identity
The Baldwin Filters B7221 is a spin-on HVAC control filter with a 3/4"-16 thread designed for equipment running a Lister-Petter LPA3A engine. It targets technicians and fleet operators who need a direct-fit replacement for scheduled lube service.
Build quality and daily use
The transparent housing shows a 23 micron element, an 8 psid front-end bypass valve and an anti-drainback valve, all built into a spin-on canister measuring 2-9/16" in height and 3-11/16" in diameter. The 3/4" thread allows quick hand installation during routine maintenance.
Upgrade context
This filter replaces the original equipment spin-on unit on Lister-Petter LPA3A power plants; the jump is worth it when the old canister reaches its service interval or shows pressure-drop symptoms. It does not suit engines with different thread pitches or micron requirements.
Highlights
- 23 micron rating captures fine contaminants
- 8 psid bypass valve maintains flow under pressure
- Anti-drainback valve prevents dry starts
- 3/4"-16 thread fits Lister-Petter LPA3A engines
- Compact 2-9/16" height suits tight installations
Specifications
| Brand | BALDWIN FILTERS |
|---|---|
| Color | Transparent |
Questions about this item
What does the 3/4"-16 thread size mean for compatibility?
The 3/4"-16 thread size matches the mounting port on equipment using the Lister-Petter LPA3A engine, ensuring a direct fit without adapters.
What clearance is needed for the 2-9/16" height and 3-11/16" diameter?
You need at least 2-9/16 inches of vertical clearance and a 3-11/16 inch diameter opening to accommodate the spin-on canister body.
How do you install the spin-on filter and which step is often missed?
Lubricate the gasket with clean oil, thread the filter on by hand until the gasket contacts the base, then tighten an additional three-quarters to one full turn; the missed step is pre-lubricating the gasket.
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