Graco 15B870 Suction Drain Cup – Essential Fluid‑Handling Component
The Graco 15B870 Suction Drain Cup is a genuine OEM replacement part designed to support proper suction and drainage operations in Graco airless spray systems. This component plays a critical role in ensuring efficient material flow – both when drawing fluid into the pump and when draining residual fluid after use – thereby helping maintain performance, reduce downtime, and minimize contamination risks.
Technical Specifications
| Specification | Value / Detail |
| Part Number | 15B870 |
| Description | Suction/Drain Cup |
| Typical Package Dimensions | ~3.95 in × 4.85 in × 3.75 in (supplier listing) |
| Material / Construction | Durable molded cup fitted for fluid suction or drainage applications in airless equipment |
| OEM Application / Fitment | Used in multiple Graco airless sprayer models to manage suction and drain functions |
Features & Benefits
- Dual‑function design – suitable for both suction (fluid intake) and drainage (fluid removal) operations.
- OEM‑quality component – ensures proper fit and material compatibility with Graco systems.
- Improves maintenance operations – allows easy drainage of residual fluid and helps prevent buildup or contamination.
- Helps maintain pump performance – by enabling proper suction flow from reservoir or hopper, reducing risk of cavitation or feed issues.
- Simple replacement – integrates easily into existing suction/drain assemblies with minimal effort and downtime.
Applications & Usage
The 15B870 Suction Drain Cup is commonly used in professional finishing and coating operations where Graco airless sprayers are employed. Typical uses include:
- Fluid suction from reservoir/hopper into the pump in Graco airless spray systems.
- Draining residual coating, paint, or solvent from the system during cleaning or maintenance.
- Replacement during service intervals when the existing cup shows wear, cracking, or is missing.
- High‑volume finishing applications where reliable feed and drainage support smooth workflow.
Frequently Asked Questions
The cup serves to capture fluid either being drawn into the pump (suction) or being drained out during maintenance, helping maintain system cleanliness and fluid flow integrity.
While aftermarket cups may physically fit, using the genuine Graco 15B870 ensures correct material, dimension, and fitment for optimum performance and reliability in Graco equipment.
If you notice fluid leakage, cup deformation, cracks, or difficulty draining or suctioning fluid, replace the cup to maintain system performance and prevent damage.
