Speck Pump Volute Adapter – Professional Series
Model: 2500223433
We supply this specialized Speck pump volute adapter, designed specifically for the 21-80 series pumps.
Product Overview
This precision-engineered adapter is designed to provide a secure connection for Speck 21-80 series pump volutes, offering versatile plumbing options with its dual-threaded configuration.
Key Features
- Compatible with all Speck 21-80 pump models
- Female pipe thread (FPT) on both ends
- Professional-grade construction
- Dual-size threading: 2-3/4″ to 3″ FPT
- Designed for commercial applications
- Precision-machined for optimal fit
Technical Excellence
This adapter is manufactured to exacting specifications, ensuring perfect alignment and secure connections for commercial pool and spa applications. The dual-sized threading offers installation flexibility while maintaining the integrity of your pump’s performance.
Specifications Table
| Specification | Detail |
|---|---|
| Model Number | 2500223433 |
| Compatibility | All Speck 21-80 Models |
| Type | Volute Adapter |
| Inlet Size | 2-3/4″ FPT |
| Outlet Size | 3″ FPT |
| Application | Commercial Pumps |
| Connection Type | Female Pipe Thread |
| Material | Commercial Grade |
Exploded parts diagrams: This part is shown as item #4b on the Speck Pumps Model 21-80/30 G Water Feature Pump; item #4b on the Speck Pumps Model 21-80 G Water Feature Pump; item #4b on the Speck Pumps Model 21-80 GS Water Feature Pump; item #26a on the Speck Pumps Model 21-80 BS Water Feature Pump exploded parts diagrams.
🔧 Speck Pumps Model 21-80/30 G Water Feature Pump – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
Installation Compatibility
This adapter is specifically designed for integration with Speck 21-80 series pumps. Its threaded connections ensure a secure fit and proper alignment with existing plumbing systems, making it ideal for both new installations and system upgrades.
Technical Application
The adapter serves as a crucial component in commercial pump installations where pipe size transitions are necessary. Its robust construction ensures reliable performance in demanding commercial environments while maintaining proper flow characteristics.
Quality Assurance Note
Each adapter is manufactured to meet strict quality control standards, ensuring consistent performance and reliability in commercial applications.
Note: Professional installation is recommended to ensure proper fit and function within your pump system.
🔧 Exploded diagram and parts
This part belongs to the Speck Pumps Model 21-80/30 G Water Feature Pump assembly. Everything listed below is something we stock for it, and the numbers match the diagram.





































