

SprayTech part 704-552A is a piston assembly designed to drive fluid movement within the pump system of compatible airless sprayers. This component plays a central role in generating pressure, ensuring consistent material flow, and supporting efficient operation. It helps maintain stable performance, smooth cycling, and reliable output. This part restores proper pump function and dependable operation on compatible units.
| Part Number | 704-552A |
|---|---|
| Part Description | Piston Assembly |
| Brand | SprayTech |
| Fits | Impact 640 I and IA; Impact 540 Airless Sprayer operation; Impact 440 service; Impact 440 operation; Impact 410; Helix LP; Advantage 500; Advantage 400 |
| Condition | New |
The SprayTech 704-552A Piston Assembly is a key component within the pump system, responsible for generating the pressure needed to move coating material through the sprayer. On compatible units such as the Impact series, Advantage models, and Helix LP, this assembly converts mechanical motion into the reciprocating action required for fluid movement. Proper piston operation ensures consistent spray output, stable pressure, and efficient system performance. The piston assembly works in coordination with seals, packings, and valves to maintain a controlled flow of material and prevent leakage during operation. Over time, piston assemblies may experience wear, scoring, or seal degradation due to continuous use, high-pressure conditions, and exposure to abrasive coatings. These issues can lead to pressure loss, uneven spray patterns, or reduced efficiency. Replacing the piston assembly restores proper pump function, improves pressure stability, and helps maintain reliable performance under both standard and demanding working conditions.
A worn or damaged piston assembly may result in pressure loss, inconsistent spray output, or reduced system efficiency. Replacing this component helps restore proper operation and consistent performance.
| Pressure generation | Creates the force needed to move coating material |
|---|---|
| Fluid movement | Drives material through the pump and spray system |
| System efficiency | Supports smooth and consistent operation |
| Pressure loss | Reduced or unstable spray pressure |
|---|---|
| Uneven spray | Irregular coating pattern during use |
| Seal wear | Leakage or degraded sealing performance |
| Component damage | Visible wear or scoring on piston surfaces |
Part 704-552A is compatible with the following models:
| Model | Component |
|---|---|
| Impact 640 I and IA | Piston assembly |
| Impact 540 Airless Sprayer operation | Piston assembly |
| Impact 440 service | Piston assembly |
| Impact 440 operation | Piston assembly |
| Impact 410 | Piston assembly |
| Helix LP | Piston assembly |
| Advantage 500 | Piston assembly |
| Advantage 400 | Piston assembly |
Transfer motion to drive the piston assembly
Maintain pressure and prevent leakage
Regulate fluid movement within the pump system