3 Size Pool Winterizing Plug (1", 1.25", 1.5") - Pool Rubber Expansion Plug with Screw, Return Line & Skimmer Plugs for Inground & Above-Ground Pools
Set of three rubber pool winterizing expansion plugs in 1 inch, 1.25 inch, and 1.5 inch sizes with stainless steel screws.
Infographic showing dimensions and size compatibility for 1in, 1.25in, and 1.5in pool winterizing expansion plugs.
Instructional graphic showing how to measure pool pipe diameter for selecting the correct winterizing expansion plug size.
Three rubber pool winterizing expansion plugs with stainless steel screws in 1in, 1.25in, and 1.5in sizes.
Close-up of pool winterizing plug showing high-quality rubber body and stainless steel wing nut bolt construction.
Rubber pool winterizing expansion plug with stainless steel wing nut for return lines and skimmers.
Infographic showing wide application of pool winterizing plugs in swimming pools, kitchen sinks, and bathroom sinks.
Rubber expansion winterizing plug with stainless steel wing nut for inground and above-ground pool return lines.
Set of three rubber pool winterizing expansion plugs in 1 inch, 1.25 inch, and 1.5 inch sizes with stainless steel screws.
Infographic showing dimensions and size compatibility for 1in, 1.25in, and 1.5in pool winterizing expansion plugs.
Instructional graphic showing how to measure pool pipe diameter for selecting the correct winterizing expansion plug size.
Three rubber pool winterizing expansion plugs with stainless steel screws in 1in, 1.25in, and 1.5in sizes.
Close-up of pool winterizing plug showing high-quality rubber body and stainless steel wing nut bolt construction.
Rubber pool winterizing expansion plug with stainless steel wing nut for return lines and skimmers.
Infographic showing wide application of pool winterizing plugs in swimming pools, kitchen sinks, and bathroom sinks.
Rubber expansion winterizing plug with stainless steel wing nut for inground and above-ground pool return lines.

3 Size Pool Winterizing Plug (1", 1.25", 1.5") - Pool Rubber Expansion Plug with Screw, Return Line & Skimmer Plugs for Inground & Above-Ground Pools

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$13.19
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$13.19
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Rubber Pool Plugs (1 Inch, 1.25 Inch, 1.5 Inch)

Key Features

  • Set includes three expansion plugs in common pool plumbing sizes: 1 inch, 1.25 inches, and 1.5 inches.
  • Constructed from durable black rubber for a secure, watertight seal.
  • Features stainless steel hardware (bolt and wing nut) for corrosion resistance.
  • Designed to prevent water from entering pipes during winter, protecting them from freeze damage.
  • Simple hand-tightening mechanism expands the rubber to fit securely inside the pipe.

Replaces / Cross-Reference Part Numbers

  • 1" Plug: Replaces standard size #5 winterizing plugs.
  • 1.25" Plug: Replaces standard size #7 winterizing plugs.
  • 1.5" Plug: Replaces standard size #9 and #10 winterizing plugs.

Compatibility & Fitment

  • Designed for use in standard 1", 1.25", and 1.5" pool fittings.
  • Commonly used to plug skimmer lines, return lines, and automatic cleaner lines.
  • Suitable for winterizing most in-ground and above-ground swimming pools and spas.

When to Replace

  • The rubber is cracked, hardened, or no longer pliable.
  • The plug fails to create or maintain a watertight seal, resulting in leaks.
  • Hardware is rusted, corroded, or the threads are stripped.
  • Visible deformation or damage prevents a proper fit.

Installation Tips

  • Ensure the water level in the pool is below the fitting to be plugged.
  • Clean any debris from the inside of the pipe or fitting opening.
  • Insert the plug into the fitting until it is seated firmly.
  • Hand-tighten the wing nut clockwise. This will compress the rubber, causing it to expand and seal the pipe.
  • Continue tightening until the plug is snug. Do not over-tighten, as this can damage the plug or the pool's plumbing.
  • Verify that no water is leaking past the plug after installation.
3 Size Pool Winterizing Plug (1", 1.25", 1.5") - Pool Rubber Expansion Plug with Screw, Return Line & Skimmer Plugs for Inground & Above-Ground Pools 1
3 Size Pool Winterizing Plug (1", 1.25", 1.5") - Pool Rubber Expansion Plug with Screw, Return Line & Skimmer Plugs for Inground & Above-Ground Pools 2
3 Size Pool Winterizing Plug (1", 1.25", 1.5") - Pool Rubber Expansion Plug with Screw, Return Line & Skimmer Plugs for Inground & Above-Ground Pools 3
EASY TO USE

EASY TO USE

With their threaded design, these swimming pool return tube plugs ensure a secure fit and easy installation, simplifying the process of protecting your pool tubes from breaking in colder temperatures.
DURABLE AND RELIABLE CONSTRUCTION

DURABLE AND RELIABLE CONSTRUCTION

Crafted from high-quality rubber, BlueStars Pool Plugs boast stable and robust performance. The meticulous design ensures resistance to cold weather conditions without slipping or shrinking, offering longevity and reliability for extended use.
BLUESTARS POOL PARTS THE KEY TO YOUR POOL'S LONGEVITY

BLUESTARS POOL PARTS THE KEY TO YOUR POOL'S LONGEVITY

BlueStars pool replacement parts offer strict quality control to give you the best experience, backed by our enduring commitment to excellence!

Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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Package Dimensions
3.31 x 2.8 x 1.61 inches
Item Weight
3.52 ounces
Manufacturer
BlueStars

FAQs

These plugs are typically used to seal pool plumbing openings during winterization, including return lines and some skimmer-related ports. They can be used on both inground and above-ground pools as long as the pipe or fitting opening matches one of the listed plug sizes: 1 inch, 1.25 inch, or 1.5 inch.
Choose the plug size based on the inside diameter of the opening you need to seal. Measure the pool return, suction, or skimmer port carefully before ordering. A winterizing plug works by compressing rubber against the wall of the opening, so correct sizing is important for a watertight seal.
The plug is inserted into the pool opening and then tightened using the stainless steel screw. Tightening compresses the rubber body so it expands outward and seals against the inside of the pipe or fitting. This helps block water from re-entering the line during off-season storage or maintenance.
Replace the plug if the rubber is cracked, flattened, dry-rotted, or no longer expands evenly when tightened. Other signs include persistent leaking around the plug, visible corrosion on the hardware, or difficulty getting the plug to stay firmly seated in the line.
Installation is usually straightforward and only takes a few minutes per opening. In most cases, you just insert the plug into the cleaned port and tighten the screw until the rubber expands snugly. A basic hand tool such as a screwdriver or wrench may be needed depending on the plug's screw head design. Avoid overtightening, which can damage the rubber or fitting.
Before installing, make sure the line has been properly blown out or drained according to your pool winterizing procedure. Also inspect the pipe opening for debris, cracks, rough edges, or old gasket material that could prevent a good seal. A clean, dry opening helps the rubber seat more securely.
The most common causes are age, repeated compression, chemical exposure, UV exposure, and temperature cycling. Rubber can harden or lose elasticity after multiple seasons, which reduces sealing performance. Hardware can also corrode over time if exposed to moisture and pool chemicals.