Schier GB-50 Hydromechanical Grease Interceptor User Manual

1. Product Overview

The Schier GB-50 is a high-flow, 50 GPM hydromechanical grease interceptor designed for efficient grease and solids separation in commercial and industrial applications. It features best-in-class certified grease capacity and significant kitchen solids waste capacity. This unit offers versatile installation options, including above-grade or below-grade, and indoor or outdoor placement.

Key features include:

• 4" FPT inlet/outlet with 4" plain end adapters, single inlet, and triple outlet for flexible plumbing.
• Maximum operating temperature: 150º F continuous.
• Capacities: Liquid: 65 gal., Grease: 439.5 lbs. (60 gal.) @50 GPM, Solids: 13 gal.
• Designed exclusively for gravity drainage applications; not suitable for pressure applications.
• Integral air relief, anti-siphon, and sampling access points.
• Engineered inlet and outlet diffusers with removable inspection ports for easy cleaning and pipe inspection.
• Adjustable cover adapter provides up to 4" of additional height for installation flexibility.
• The cover placement ensures full access to the tank for proper maintenance.

Figure 1: Front view of the Schier GB-50 Hydromechanical Grease Interceptor. This image shows the main body of the interceptor, highlighting its robust construction and the prominent "GB-50" model designation.

2. Setup and Installation

The GB-50 grease interceptor is designed for flexible installation in various environments. It can be installed either above ground (on the ground surface) or buried below ground. For below-grade installations, the unit is compatible with an FCR2 riser (sold separately) to bring the system to grade level. It is suitable for both indoor and outdoor use.

2.1. Site Preparation

• Ensure the installation site is level and stable to support the weight of the unit when full.
• Verify adequate space for installation, maintenance access, and future pump-out operations.
• Confirm that the plumbing connections (inlet and outlet) align with the unit's 4" FPT ports.

2.2. Plumbing Connections

The unit features a single inlet and triple outlet configuration, providing flexibility for plumbing layouts. Use the provided 4" plain end adapters for connection. An unused outlet can be utilized for remote pump-out with PP3 compatibility.

• Connect the incoming wastewater line to the designated inlet port.
• Connect the outgoing treated water line to one of the outlet ports.
• Ensure all connections are watertight and secure to prevent leaks.
• Ventilation is not typically required unless mandated by local codes.

Figure 2: Dimensions of the Schier GB-50 Grease Interceptor. This image provides critical measurements for installation planning, including height, width, and length, as well as the height to the inlet and the adjustable cover adapter's additional height capability.

3. Operating Instructions

The Schier GB-50 is designed for passive operation in gravity drainage systems. It separates grease, oils, and solids from wastewater through a hydromechanical process.

• Gravity Drainage Only: This unit is strictly for gravity drainage applications. Do not connect it to or use it in pressure applications, as this can damage the unit and void the warranty.
• Temperature Limits: Ensure the incoming wastewater temperature does not continuously exceed 150º F (65º C). Exceeding this temperature can compromise the unit's performance and integrity.
• Flow Rate: The interceptor is rated for a flow rate of 50 GPM (Gallons Per Minute). Operating within this flow rate ensures optimal separation efficiency.

Once installed and connected, the unit operates continuously as wastewater flows through it, allowing grease and solids to separate and accumulate within the tank.

4. Maintenance

Regular maintenance is crucial to ensure the long-term efficiency and proper functioning of your Schier GB-50 grease interceptor. The frequency of maintenance will depend on the volume and type of waste processed.

4.1. Grease and Solids Removal

• Access: The cover placement provides full access to the tank interior for thorough cleaning.
• Inspection: Periodically inspect the grease and solids levels. The unit has a grease capacity of 439.5 lbs (60 gal.) and a solids capacity of 13 gal.
• Pumping: When grease and solids accumulate to their maximum capacity, the unit must be pumped out by a qualified waste management service. Do not attempt to dispose of collected grease and solids through standard plumbing.

4.2. Cleaning Diffusers and Inspection Ports

The engineered inlet and outlet diffusers, along with their inspection ports, are removable for cleaning and inspection of the connected piping.

• Remove the inspection port covers and diffusers as needed to clear any blockages or buildup.
• Clean the diffusers thoroughly to ensure unrestricted flow and optimal separation.
• Reinstall all components securely after cleaning.

5. Troubleshooting

If you encounter issues with your Schier GB-50 grease interceptor, consider the following common problems and solutions:

• Slow Drainage or Backups:
  • Cause: Over-accumulation of grease or solids.
  • Solution: The unit requires pumping out. Increase the frequency of maintenance if this occurs often.
  • Cause: Blockage in inlet/outlet piping or diffusers.
  • Solution: Inspect and clean the removable diffusers and associated piping.
• Odor Issues:
  • Cause: Infrequent cleaning leading to stagnant waste.
  • Solution: Pump out and thoroughly clean the interceptor. Ensure proper ventilation if required by local codes.
  • Cause: Issues with plumbing traps or vents.
  • Solution: Consult a plumber to inspect the building's drainage system.
• Water Leaks:
  • Cause: Loose or improperly sealed connections.
  • Solution: Inspect all inlet and outlet connections, as well as the cover seal, and tighten or reseal as necessary.
  • Cause: Damage to the unit.
  • Solution: If the unit itself is damaged, contact Schier or a qualified professional for assessment and repair/replacement.

For persistent issues not resolved by these steps, it is recommended to contact a qualified plumbing professional or the manufacturer's support.

6. Specifications

7. Warranty and Support

Warranty information for the Schier GB-50 Hydromechanical Grease Interceptor is typically provided by the manufacturer at the time of purchase or can be found on the official Schier website. Please retain your proof of purchase for warranty claims.

For technical support, replacement parts, or further assistance, please contact Schier directly through their official customer service channels. Always refer to your specific model number (4025-017-01) when seeking support.