Part number 704-612 is a genuine crush washer used in a wide range of airless sprayers including Airless Sprayer 440IX/540IX/640IX, Advantage, Helix, Impact, Impact X, PowrLiner, and RentSpray models. This one-time-use sealing washer deforms under compression to create a leak-tight seal between mating components such as fittings, plugs, and pump connections. It prevents fluid leakage, maintains pressure, and ensures reliable operation. A worn or reused crush washer can cause drips, pressure loss, or air ingestion. This genuine replacement restores proper sealing.
| Part Number | 704-612 |
|---|---|
| Part Description | Crush Washer |
| Brand |
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| Fits |
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| Condition | New |
The 704-612 Crush Washer is a genuine OEM sealing component designed for a wide variety of airless sprayers. This precision-formed metal washer is engineered to deform plastically when tightened, creating a permanent, leak-proof seal between mating components such as hydraulic fittings, drain plugs, pump connections, and pressure switches.
Unlike standard flat washers, crush washers are designed for one-time use. When compressed, the washer material flows into microscopic imperfections in the mating surfaces, forming a perfect seal that can withstand high pressures and temperature cycling. They are commonly used in high-pressure fluid systems where reliable sealing is critical to prevent leaks and maintain system pressure.
Over time, crush washers can become work-hardened, cracked, or lose their ability to seal properly if reused. A leaking crush washer can cause fluid loss, pressure drop, air ingestion, and messy drips. Replacing a worn or previously used crush washer with this genuine part ensures a proper seal and reliable operation.
| Leak prevention | Deforms under compression to create a permanent, leak-tight seal |
|---|---|
| Pressure containment | Withstands high system pressures without extruding or failing |
| Surface compensation | Flows into surface imperfections to ensure complete sealing |
| One-time use | Designed for single installation only; cannot be reused |
| After any disassembly | Always replace crush washer whenever fitting is loosened or removed |
|---|---|
| Visible leakage | Fluid seeps from sealed joint during operation |
| Work hardening | Washer feels hard and no longer deforms under compression |
| Cracking / damage | Visible cracks or deformation that compromises sealing ability |
Part 704-612 is compatible with the following sprayer models. Always verify your machine's parts diagram to confirm correct fitment.
| Brand / Model | Component |
|---|---|
| Airless Sprayer 440IX | Crush Washer |
| Airless Sprayer 540IX | Crush Washer |
| Airless Sprayer 640IX | Crush Washer |
| Advantage 400 | Crush Washer |
| Advantage 500 | Crush Washer |
| Helix (Model No. 0138040) | Crush Washer |
| Helix (Model No. 0138065) | Crush Washer |
| Impact 340 | Crush Washer |
| Impact 400 | Crush Washer |
| Impact 410 | Crush Washer |
| Impact 440 | Crush Washer |
| Impact 640 I | Crush Washer |
| Impact 640 IA | Crush Washer |
| Impact X 410 | Crush Washer |
| Impact X 440 | Crush Washer |
| Impact X 540I | Crush Washer |
| PowrLiner 1800M | Crush Washer |
| PowrLiner 2800M | Crush Washer |
| RentSpray 450 | Crush Washer |
| RentSpray 650 | Crush Washer |
| RentSpray 500 | Crush Washer |
| RentSpray 600 | Crush Washer |
When replacing a crush washer, it's good practice to inspect these related components, as they are often serviced at the same time.
Inspect the mating fitting or plug for damage, corrosion, or stripped threads that could affect sealing.
Other seals in the same fluid circuit may also be worn. Consider replacing them during service.
Inspect the surfaces where the crush washer seats for nicks, scratches, or debris that could cause leaks.
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