💧 Gasket, Rainbow RDC, Support Ring, 2-1/8″ID, 3″OD
Made by Pentair, manufacturer part number R172232X.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Pentair |
| Manufacturer part number | R172232X |
| Part Type | Gasket |
| Inside Diameter | 2-1/8″id |
| Outside Diameter | 3″od |
| Catalog description | Gasket, Rainbow RDC, Support Ring, 2-1/8″ID, 3″OD |
Exploded parts diagram: This part is shown as item #12 on the Inline Filter, Pentair Rainbow, RDC Series exploded parts diagram.
🔧 Inline Filter, Pentair Rainbow, RDC Series – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Ro-Kit 251, Rainbow In-Line and Top Load Filters |
| 13 | 16-196-W005K13 |
| 12 | Gasket, Rainbow RDC, Support Ring, 2-1/8"ID, 3"OD ◀ this part |
| 10 | Lock Ring, Pentair Rainbow RDC/RTL/Leaf Traps |
| 9 | Tank Body, Pentair Rainbow RDC |
| 8 | 16-196-W005K8 |
| 7 | 16-196-W005K7 |
| 6 | Gasket, Rainbow RTL/RDC/Bromine, Lid, 2" ID, 2-7/8" OD |
| 5 | 16-196-W005K5 |
| 4 | Bypass Plug, Pentair Rainbow RDC/RTL/DSF, 1-1/2" |
| 3 | O-Ring, 3/8" ID, 1/16" Cross Section, Generic |
| 2 | Air Bleed Valve, Pentair Rainbow RDC/RTL/Bromine |
| 1a | 16-196-W005K1A |
| 1 | 16-196-W005K1 |
🔧 Exploded diagram and parts
This part belongs to the Inline Filter, Pentair Rainbow, RDC Series assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
Complete ro-kit 251s
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
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Ro-Kit 251, Rainbow In-Line and Top Load Filters | RO-KIT 251 | 8 in stock | $8.64 | Add to cart |
Parts that go with this
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
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Silicone, DOW 732, 3oz Tube, Clear | DC-732-CLR-3 | 186 in stock | $17.88 | Add to cart |
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Silicone, DOW 732, 10.1oz Cartridge, Clear | DC-732-CLR-10.3 | 43 in stock | $28.02 | Add to cart |





















