💧 Piston Assembly, Waterway 2-1/2″ Slide Valve
Made by Waterway, manufacturer part number 500-1600.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Waterway |
| Manufacturer part number | 500-1600 |
| Plumbing Connection Size | 2-1/2″s |
| Valve Part Type | 2 Port |
| Catalog description | Piston Assembly, Waterway 2-1/2″ Slide Valve |
Exploded parts diagram: This part is shown as item #1 on the Waterway 2-1/2″ PVC Slide Valve exploded parts diagram.
🔧 Waterway 2-1/2" PVC Slide Valve – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| 10 | 26-270-W009K10 |
| 9 | 90-Elbow, 2" Spigot x 2" Spigot |
| 8 | O-Ring, 2-3/4" ID, 1/8" Cross Section, Generic |
| 7 | Reducer, Waterway, 2-1/2" to 2" |
| 6 | Reducer, Waterway, 2" to 1-1/2" |
| 5 | Gasket, Waterway Push/Pull, Piston, 7/16"ID, 2-9/16"OD |
| 4 | O-Ring, 2-1/4" ID, 1/8" Cross Section, Generic |
| 3 | 90-423-7206 |
| 2 | Union Nut, Waterway 2-1/2" Slide Valve, 2" |
| 1a | Handle, Waterway 2-1/2" Slide Valve, with Pin |
| 1 | Piston Assembly, Waterway 2-1/2" Slide Valve ◀ this part |
🔧 Exploded diagram and parts
This part belongs to the Waterway 2-1/2" PVC Slide Valve assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 6 | ![]() |
Reducer, Waterway, 2" to 1-1/2" | 421-4071 | Available to order | $3.28 | |
| 7 | ![]() |
Reducer, Waterway, 2-1/2" to 2" | 421-4201 | 11 in stock | $8.82 | Add to cart |
| 9 | ![]() |
90-Elbow, 2" Spigot x 2" Spigot | 411-5081 | Available to order | $6.21 |
Parts that go with this
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
![]() |
Silicone Based Lubricant 1oz 00150 | 00150 | 343 in stock | $5.26 | Add to cart |
![]() |
O-Ring Chart, Aladdin | MG1 | 17 in stock | $83.58 | Add to cart |









