Graco 164782 Packing O-Ring 2-1/16 x 2-1/4 Nominal
$67.50
Available to Order
Genuine Graco 164782 Packing O-Ring (nominal 2-1/16" × 2-1/4") for sealing the pump’s fluid/displacement section. Check your IPL to confirm fit before ordering.
- Maintains pressure and prevents fluid bypass
- Typical PTFE/Teflon-type chemical resistance
- OEM dimensions for reliable sealing
Fits these pump families when specified in the IPL:
- Monark 5:1
- Viscount I
- President 10:1
- Premier 74:1
- C Series 224349
- A Series 256712
Quantity
Genuine OEM Part
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Part Overview & Key Details
Compatible Machines
This Graco packings O-ring is used in the displacement/fluid section of the pump on the following families. Always confirm with your model’s IPL before ordering.
- Graco Monark 5:1 airless feed pump series
- Graco Viscount I (and related Viscount series) pumps
- Graco President 10:1 pump series
- Graco Premier 74:1 pump series
- Graco C Series 224349 displacement pump assembly
- Graco A Series 256712 severe-duty stainless pump assembly
What is it?
The Graco 164782 is a Packing O-Ring (nominal 2-1/16" × 2-1/4") commonly used to seal interfaces within the pump’s fluid/displacement section. Proper sealing prevents bypass, pressure loss, and leakage under airless operating pressures.
Technical Specifications
| Part Number | 164782 |
|---|---|
| Description | Packing O-Ring, nominal 2-1/16" × 2-1/4" |
| Typical Location | Fluid/displacement (pump) section — sealing gland/throat/outlet interfaces |
| Typical Material | PTFE/Teflon-type sealing element (verify against your IPL for exact spec) |
| Known Pump Families | Monark 5:1, Viscount I, President 10:1, Premier 74:1, C Series 224349, A Series 256712 |
| Verification | Confirm by model/serial and the Graco Illustrated Parts List (IPL) for your machine |
Why choose the Graco 164782 O-Ring?
- Correct Fitment for listed Graco pump families when specified in the IPL
- Pressure Retention helps maintain steady spray pressure and pattern quality
- Chemical Resistance typical of PTFE-type seals for common coatings
- OEM Reliability — consistent dimensions and material for repeatable sealing
Fitment & Installation Notes
- Verify pump ratio/family and part location in your IPL before purchase.
- Inspect mating surfaces; clean and lightly lubricate if the IPL/procedure calls for it.
- Replace companion packings/gaskets if worn to ensure a complete seal.
- After installation, pressure-test with compatible fluid and check for leaks.
Frequently Asked Questions
Locate your unit’s Illustrated Parts List (IPL). If the diagram/bill of materials calls out 164782 at the sealing position, it’s the correct part. If a different size/material is listed, follow the IPL exactly to avoid leaks or pressure loss.
Inspect and clean grooves/mating surfaces. If specified, apply a light compatible lubricant to prevent twisting or pinching. Seat the O-ring evenly, torque hardware to spec, then pressure-test with compatible fluid and check for seepage before production use.
Substitutions are not recommended unless the Graco IPL or a documented service bulletin permits it. Incorrect size/material can cause premature failure, pattern instability, or leakage.
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