Graco 164250 Ball Stop Pin
$17.20
Available to Order
Direct-fit Ball Stop Pin for the Graco T3 Transfer Pump. Helps maintain check-valve seal and consistent feed. Verify your pump is T3 (not T1/T2) before ordering.
- Part: 164250 Ball Stop Pin
- Pump: T3 Transfer Pump (stainless & carbon steel variants)
- Role: Limits ball travel for reliable check action
- Not for: T1 / T2 transfer pumps
- Service Tip: Inspect ball, seat & seals together during replacement
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
Easy Returns
Part Overview & Compatibility
This Graco 164250 Pin—also known as the Ball Stop Pin—is an internal component for the T3 Transfer Pump. If your proportioner is supplied by a T3 pump, this is the correct pin.
Compatible Machines
- Graco T3 Transfer Pump – Stainless Steel variants (e.g., 26A304)
- Graco T3 Transfer Pump – Carbon Steel variants (e.g., 24Z834, 25D296, 24Z987 packages)
- Systems using a T3 Transfer Pump to feed material, including many Reactor spray-foam rigs (E-series, H-series, Reactor 2 / Reactor 3) that are plumbed with T3 supply pumps
What This Part Does
The Ball Stop Pin acts as a mechanical stop for the pump ball inside the fluid section, helping maintain proper check-valve operation and consistent material feed in the T3 Transfer Pump.
Product Details
| Part Number | 164250 |
|---|---|
| Common Name | Ball Stop Pin / Pin |
| Primary Application | Graco T3 Transfer Pump (internal check-valve stop) |
| Typical Systems | Spray-foam / polyurea rigs where a T3 Transfer Pump supplies the proportioner (e.g., many Reactor packages) |
| Notes | Not used on T1/T2 pumps. Verify pump family and parts list before ordering. |
Frequently Asked Questions
The 164250 pin is specified for the T3 Transfer Pump. It is not intended for T1/T2 pumps. Always confirm with your pump’s parts list or manual before purchase.
Many Graco Reactor spray-foam systems (E-series, H-series, Reactor 2/3) are commonly supplied by T3 Transfer Pumps. If your rig has a T3 at the drum, it uses this pin.
Inconsistent feed, loss of prime, or poor check-valve sealing after normal wear. Inspect the ball, seat, seals, and the Ball Stop Pin together during maintenance.
Keep components clean, verify orientation, and torque fasteners per the pump service manual. After assembly, test for proper check-valve function before returning to service.
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