Choose Your Variant
| Variant | SKU | Connection | Compatible With |
|---|---|---|---|
| Slip Pump Head | B251 | Slip — push straight in, no rotation | Pos-T-Vac slip-connection cylinders (older systems) |
| Twist Pump Head | B226 | Twist-lock — rotate to lock, superior seal | Pos-T-Vac twist-lock cylinders (current systems) |
Not sure which variant your system uses? Check your cylinder: if it pushes straight in, order Slip (B251). If it rotates and locks, order Twist (B226). Still unsure — call us: 866-218-0902.
Specifications
| Specification | Detail |
|---|---|
| Operation | Push-button automatic — 2 AA battery motor |
| Batteries | 2 AA batteries (not included — have batteries ready) |
| Safety Valve | Quick-release safety valve — press to immediately release vacuum pressure |
| Connection Options | Slip (B251) or Twist (B226) — see variant table above |
| Compatible System | Pos-T-Vac Automatic 2000 (BOS-2000-2) |
| Sold As | Pump head only — cylinder not included |
| Manufacturer | Timm Medical / Pos-T-Vac |
When to Replace Your Pump Head
- Battery motor fails to create vacuum or runs noticeably weaker than when new despite fresh batteries
- Safety release valve no longer functions correctly — fails to release pressure or releases unintentionally
- Pump head physically damaged — cracked housing, broken button, or damaged battery compartment
- Motor runs but maximum vacuum is lower than expected — internal seal may be compromised
- Your cylinder is still in good condition — replacing only the pump head is significantly more economical than replacing the complete Automatic 2000 system
Slip vs. Twist — Full Comparison
| Feature | Slip (B251) | Twist (B226) |
|---|---|---|
| Connection Method | Push straight in — friction fit | Rotate and lock — mechanical seal |
| Vacuum Seal Quality | Standard — friction dependent | Superior — locked joint resists flex under vacuum |
| Compatible Cylinders | Slip cylinders only | Twist-lock cylinders only |
| System Generation | Older Pos-T-Vac systems | Current Pos-T-Vac systems |
| Interchangeable? | No — slip and twist cylinders are not interchangeable | |
Pos-T-Vac Battery Pump Head Lineup
| Pump Head | Batteries | Connection | Best For |
|---|---|---|---|
| BOS-2000-2 Slip (This — B251) | 2 AA | Slip | Replacing head on older slip-connection system |
| BOS-2000-2 Twist (This — B226) | 2 AA | Twist | Replacing head on current twist-lock system |
| BOS-2000-3 (3-cell) | 3 AA | Twist | Upgrading to maximum motor power |
FAQs
Do AA batteries come included?
No — 2 AA batteries are required and not included. Have batteries ready before installation so the head is ready to use immediately.
How do I know if I need the slip or twist variant?
Twist (B226): your cylinder rotates and clicks into a locked position on the pump head. Slip (B251): your cylinder pushes straight in without rotating. Check your existing setup before ordering — the two are not interchangeable. If unsure, call us with your device model number: 866-218-0902.
Can I upgrade from a slip to a twist system with this purchase?
No — the pump head and cylinder must match. A twist pump head requires a twist cylinder; a slip pump head requires a slip cylinder. To switch connection types, you would need to replace both the pump head and the cylinder. Call us to discuss: 866-218-0902.
Is this compatible with the Automatic 3000 (BOS-3)?
No — the BOS-2000-2 replacement head is the 2-cell version for the Automatic 2000 system. For the Automatic 3000 (BOS-3), see the BOS-2000-3 3-cell pump head.
Does replacing the pump head void my system warranty?
No — using the OEM Timm Medical replacement pump head (B251 or B226) is the manufacturer-recommended repair. The replacement head itself carries its own warranty. Contact Timm Medical for specific warranty questions on your system.
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