17'' Pool Skimmer Guard & Plug Winterization Plug for 1 1/2" and 2'' Threaded Skimmers - Suitable for Above and Inground Pool - 2 Pack

17" Universal Pool Skimmer Winterization Guard & Plug

Key Features

• Dual-Threaded Versatility: Features a specialized stepped-thread base that fits both 1.5-inch and 2-inch internal skimmer threads, eliminating the need for separate adapters and ensuring a watertight seal across different pool brands.
• Ice Expansion Protection: Engineered as a "sacrificial" collapsible tube that absorbs the intense pressure of freezing water. If the water inside your skimmer freezes, the guard compresses to prevent the rigid plastic skimmer housing from cracking.
• Heavy-Duty HDPE Construction: Manufactured from high-density, UV-stabilized polyethylene designed to withstand sub-zero temperatures and chemical exposure without becoming brittle or losing its structural integrity.
• Integrated O-Ring Seal: Equipped with a precision-molded rubber gasket at the base to provide an airtight and watertight barrier, preventing pool water from leaking into the underground plumbing lines during the off-season.
• Extra-Long 17" Reach: The extended height ensures the top of the guard remains above the water line in most standard skimmers, providing a convenient handle for tool-free installation and removal in the spring.

Replaces / Cross-Reference Part Numbers

• Industry Standards: Gizzmo (Standard & Super), Big Gizzmo, Skimmer Guard.
• Manufacturer Equivalents: Hayward SP1022C, Pentair 516112, Swimline 8939.

Compatibility & Fitment

This winterization plug is designed to work with the majority of residential pool filtration systems in North America. Key fitment details include:

• Inground Pools: Fits standard Hayward, Pentair, and Jandy skimmer assemblies with threaded bottom ports.
• Above Ground Pools: Compatible with wide-mouth and standard skimmers utilizing 1.5" or 2" plumbing.
• Thread Compatibility: Works with NPT (National Pipe Thread) internal threads found in most PVC and ABS skimmer bodies.
• Note: While universal, verify your skimmer depth. This 17" model is ideal for deep-well skimmers; for very shallow above-ground units, a shorter 9" version may be required for the lid to close properly.

When to Replace

• Cracked or Compressed Body: If the guard did its job last winter and is now permanently "squashed" or has visible stress fractures, it must be replaced to provide protection for the next freeze.
• Stripped Threads: The plastic threads at the base are flattened or cross-threaded, making it impossible to create a watertight seal in the skimmer port.
• Missing or Dry-Rotted Gasket: The rubber O-ring is cracked, flat, or missing, which allows water to seep into your pipes and potentially cause underground freeze damage.
• Lost or Brittle Top Cap: The plastic has become "chalky" or brittle due to UV exposure, which can lead to the unit snapping off during removal.
• Water in the Lines: If you notice your plumbing lines are not staying dry during the winter, the plug has failed to maintain its seal.

Installation Tips

• Safety First: Ensure the pool water is lowered below the skimmer mouth and all lines have been "blown out" with a shop vac or compressor before installing the plug.
• Teflon Tape is Your Friend (PRO TIP): Wrap the threads of the guard 3–5 times with white Teflon tape (PTFE) before screwing it in. This ensures an airtight seal and makes it much easier to unscrew in the spring.
• Don't Overtighten: Screw the guard in by hand until it is snug. Using a wrench or "muscling" it can crack the skimmer's internal threads, which is a very expensive repair.
• The "Blow-Back" Check: After tightening, give the lines one final air purge. If you see bubbles coming from the guard's base, it isn't tight enough or needs more Teflon tape.
• Lid Clearance: If the 17" guard prevents your skimmer lid from sitting flush, you can safely trim the very top of the plastic tube (above the water line) as long as you don't compromise the airtight chamber.