Pentair Admiral S20 Concrete Pool Skimmer, 2″ Slip Ports, Circular Weir, with Equalizer (White) | 84420505
The Pentair 84420505 is a heavy-duty Admiral S20 skimmer designed for concrete (gunite/plaster) pools and spas. This model features 2″ slip (socket) plumbing ports, an exclusive circular weir, and an integral equalizer for installations that require an equalizer connection (commonly used for commercial/NSF-style applications and low-water protection designs).
Key Features
For concrete pools & spas: built for standard concrete pool construction and skimming performance.
2″ slip ports: socket connections for 2″ PVC plumbing (match your plumbing layout before ordering).
Circular weir: promotes steady surface draw and helps pull floating debris into the basket.
Equalizer-equipped: supports equalizer line setups intended to reduce pump air draw during low-water conditions (installation-dependent).
Reinforced PVC base: designed for durability and long-term stability in pool decks.
Lock-down lid style: secure cover design for safer, cleaner equipment access.
Lid extension collars: supports height adjustments for deck finish changes (as needed by the install).
Specifications
Manufacturer: Pentair
Part Number: 84420505
Skimmer Series: Admiral S20
Application: Concrete pools & spas
Weir Type: Circular weir
Equalizer: Yes
Port Size: 2″ slip (socket)
Color: White
Why Replace the Skimmer Body
Cracked skimmer throat/body causing water loss behind the deck
Broken or stripped lid/cover interface
Damaged port area, leaks at fittings, or failed equalizer connection
Major renovation or remodel requiring a new skimmer body
Installation Notes
Concrete-only: confirm you are replacing a concrete skimmer (vinyl/fiberglass skimmers are different).
Match plumbing: this model uses 2″ slip connections; verify suction line size and layout.
Equalizer setups vary: only use the equalizer connection if your design/codes require it and plumbing is present.
Professional installation is strongly recommended for deck/plaster work and leak-free bonding/plumbing.
