Premium Reducing Slip Adapter – 2-1/2″ to 2″ | 642-3680
Product Overview
As a retailer of hot tub spare parts, I’m offering this professional-grade straight reducing adapter that transitions from 2-1/2″ to 2″ slip connections. This component provides a smooth reduction in pipe size for your plumbing system.
Technical Specifications
| Specification | Detail |
|---|---|
| Model Number | 642-3680 |
| Large End | 2-1/2 inch slip |
| Small End | 2 inch slip |
| Style | Straight reducer |
| Material | Chemical-resistant thermoplastic |
| Type | Slip x slip |
| Design | Straight reduction |
Exploded parts diagram: This part is shown on the Waterway 5″ Ultra Flo Suction Fitting exploded parts diagram.
🔧 Waterway 5" Ultra Flo Suction Fitting – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Vacuum Break Fitting, Suction, 2-1/2"s x 2-1/2"spg, 90 Ell |
| – | Vacuum Break Fitting,Suction,2-1/2"spg x 2"s x 3/4"sb,90 Ell |
| – | 90 Elbow, 2-1/2" Slip x 2" Spigot |
| – | Adapter, 2-1/2" Slip x 2" Slip, Straight ◀ this part |
| 6 | Nut, Waterway 5" Super Hi-Flo Wall Fitting, 2" or 2-1/2" |
| 5 | Gasket, Waterway Super Hi-Flow Suction Fitting |
| 4 | Wall Fitting, WW 5" Ultra Flo, 2-3/8"hs, 2"s |
| 3 | 54-270-W015K3 |
| 2 | Screw, Waterway Ultra Flo Cover |
| 1 | 54-270-W015K1 |
Key Features
- Smooth size reduction
- Precision slip connections
- Professional-grade construction
- Chemical and UV-resistant materials
- Optimized flow transition
Installation Benefits
- Direct size reduction
- Easy slip connections
- Professional finish
- Reliable sealing
- Streamlined flow pattern
Applications
- Main line transitions
- Equipment connections
- Pump installations
- System modifications
- Flow optimization












