💧 Sight Glass, Waterco 2″ Top/Side Mount Valves
Made by Waterco, manufacturer part number 621381.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Waterco |
| Manufacturer part number | 621381 |
| Mounting Style | Side Mount, Top Mount |
| Plumbing Connection Size | 2″ |
| Valve Part Type | Sight Glass |
| Catalog description | Sight Glass, Waterco 2″ Top/Side Mount Valves |
Exploded parts diagrams: This part is shown as item #14 on the Waterco Side Mount Multiport Valve, 2″, 2290590; item #14 on the Waterco Top Mount Multiport Valve – 2″ Model exploded parts diagrams.
🔧 Waterco Side Mount Multiport Valve, 2", 2290590 – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Multiport Valve, Waterco Side Mount, 1-1/2", 6 Position |
| – | Multiport Valve, Waterco Side Mount, 2", 6 Position |
| 16A | 26-252-W003K16A |
| 16 | Half Union, 2", with O-Ring |
| 15 | Nut, Waterco SupaTuf/HydroStorm/SupaStream, 1/4-20 |
| 14 | Sight Glass, Waterco 2" Top/Side Mount Valves ◀ this part |
| 13 | 27-252-1190 |
| 12 | Air Release, Waterco Filter/Valve, with O-Ring |
| 11 | Gasket, Waterco 2" Top/Side Mount, 6-13/16"OD, 5 Spokes |
| 10 | Rotor, Waterco 2" Top/Side Mount Valves |
| 9 | 26-252-W003K9 |
| 8 | Spring, Waterco 2" Top/Side Mount Valves |
| 6 | O-Ring, Waterco Top/Side Mount, Cover, 7-1/4"ID, 1/8"OD |
| 5 | Cover, Waterco 2" Top/Side Mount Valves |
| 4 | Bolt, Waterco 1-1/2" and 2" Top/Side Mount Valves |
| 3 | 26-252-W003K3 |
| 2 | 27-252-1128 |
| 1 | 26-252-W003K1 |
🔧 Exploded diagram and parts
This part belongs to the Waterco Side Mount Multiport Valve, 2", 2290590 assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 4 | ![]() |
Bolt, Waterco 1-1/2" and 2" Top/Side Mount Valves | 621464 | Available to order | $3.78 | |
| 6 | ![]() |
O-Ring, Waterco Top/Side Mount, Cover, 7-1/4"ID, 1/8"OD | 30C3105 | Available to order | $18.53 | |
| 8 | ![]() |
Spring, Waterco 2" Top/Side Mount Valves | 621181 | 3 in stock | $47.68 | Add to cart |
| 9 | ![]() |
O-Ring, Waterco 2" Top/Side Mount Valves, Spring | WC621201 | Available to order | $2.10 | |
| 10 | ![]() |
Rotor, Waterco 2" Top/Side Mount Valves | 621231 | Available to order | $76.58 | |
| 11 | ![]() |
Gasket, Waterco 2" Top/Side Mount, 6-13/16"OD, 5 Spokes | 621261 | 7 in stock | $64.14 | Add to cart |
| 12 | ![]() |
Air Release, Waterco Filter/Valve, with O-Ring | 620221 | 28 in stock | $15.35 | Add to cart |
| 16 | ![]() |
Half Union, 2", with O-Ring | 634024BLK | 10 in stock | $34.69 | Add to cart |
Complete multiport valves
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
![]() |
Multiport Valve, Waterco Side Mount, 2", 6 Position | 2290590 | 5 in stock | $247.70 |
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|---|---|---|---|---|---|
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Silicone Based Lubricant 1oz 00150 | 00150 | 343 in stock | $5.26 | Add to cart |
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Tool, Pool Tool, O-Ring Pick | 134 | 18 in stock | $11.23 | Add to cart |



















