The Pentair Threaded Plug 2 in. (R22011) is the OEM replacement winterizing plug for the Pentair Vac-Mate Vacuum/Skimmer, designed to seal the 2-inch pipe thread opening during seasonal winterization.
What It Does
This polyurethane threaded plug seals the 2-inch pipe thread port on the Vac-Mate Vacuum/Skimmer when the system is taken offline for winter. A properly seated winterizing plug prevents water from entering the plumbing lines, protecting against freeze damage during cold-weather shutdowns. Match the part number on your existing plug before ordering to confirm correct thread size and fit.
Specifications
| Pentair Part Number | R22011 |
| Part Name | Threaded Plug 2 in. |
| Also Known As | Model 852 Winterizing Plug |
| Material | Polyurethane |
| Connection Size | 2 in. pipe thread |
| Quantity Included | 1 (Each) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | Vac-Mate Vacuum/Skimmer | R211100 | Threaded plug 2 in. |
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment’s manual or on the original part itself before ordering.
Pro Tip
Polyurethane plugs can take a permanent set over multiple seasons if the existing plug shows cracking, compression deformation, or no longer threads in snugly, replace it before closing the system. A plug that fails to seal fully defeats the purpose of winterization. Confirm the 2 in. pipe thread size against the port on your Vac-Mate before ordering; the Vac-Mate also uses a separate inlet plug for the suction port, which is a different part.
