Tapered Expansion Plug - 25mm

Tapered Expansion Plug — 25mm is a rubber expanding plug designed to seal or block off pool pipes quickly and securely. The tapered design (not straight) creates a tight fit inside pressure pipe, and tightens further when the wing-nut is twisted — no tools required.

Specifications

• Size: 25mm
• Fits pipe internal diameter: 22mm–35mm
• Type: Tapered rubber expansion plug with wing-nut
• SKU: MXP225

Common Uses

• Sealing the main drain in a pool skimmer box
• Blocking pipes when servicing equipment below water level
• Isolating a pipe to test whether it is the source of pool water loss

Frequently Asked Questions

What pipe size does the 25mm expansion plug fit?

The 25mm tapered expansion plug fits pipe internal diameters of approximately 22mm to 35mm.

What is the difference between a tapered and straight expansion plug?

A tapered plug is wider at one end and narrows toward the other, allowing it to fit a range of pipe sizes and create a tighter seal as the wing-nut is tightened. A straight plug is a fixed diameter and must match the pipe exactly.

How do I use a rubber expansion plug in a pool pipe?

Insert the plug into the pipe opening, then twist the wing-nut clockwise. This compresses and expands the rubber, creating a watertight seal against the pipe wall. To remove, simply loosen the wing-nut and pull the plug out.

Can I use this plug to find a pool leak?

Yes — expansion plugs are commonly used to isolate individual pipes (such as the main drain or return lines) to determine whether a specific pipe is the source of water loss. Plug the pipe, monitor water level, and compare.

Is this plug suitable for use under water?

Yes. Rubber expansion plugs can be used in submerged applications such as sealing a main drain at the bottom of the pool during servicing.