Steel Pipe Stopper 100mm

Professional 100mm steel pipe stopper designed for blanking off pipelines, drains, and sewers during maintenance or pressure testing. Featuring a robust steel chassis, an expanding rubber seal, and a central bypass nipple, it delivers a secure, leak-proof seal for standard 4-inch pipework.

Heavy Duty Zinc Plated Steel Frame: Built with a rugged steel central stem and plates that resist mechanical deformation and corrosion in damp trench environments.
Expandable Natural Rubber Perimeter Ring: Features a high-grip rubber sealing rim that expands uniformly against the inner pipe wall to form a gas and watertight block.
Threaded Steel Nominal Bypass Nipple: Outfitted with a central hollow half-inch thread and removable sealing cap to allow controlled water drainage or air testing connections.
Mechanical Wing Nut Locking Assembly: Employs a smooth twin-lip compression nut that tightens manually to compress the plates and expand the plug quickly without complex tool setups.

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FAQs

Why choose a 100mm steel pipe stopper for domestic and commercial drainage?

A 100mm steel pipe stopper is the standard size for sealing, isolating, or pressure-testing standard 4-inch soil pipes, gully lines, and domestic drainage systems.

How does a 100mm mechanical steel stopper ensure an airtight seal?

Tightening the central wing nut compresses a durable rubber ring between two zinc-plated steel plates, forcing the seal outwards against the inner pipe wall.

Is a 100mm steel mechanical stopper suitable for air and water pressure testing?

Yes, when fitted with a center outlet, it enables connection to manometers or pumps to carry out official air and water tests required for building regulations sign-off.

How resistant is a steel pipe stopper to site wear and chemicals?

Built with heavy-duty zinc-plated steel plates and chemical-resistant rubber, it resists corrosion, rust, and degradation from wastewater or aggressive ground conditions.

What is the difference between a solid and bypass 100mm steel stopper?

A solid stopper acts as a permanent or temporary blanking plug, while a bypass stopper features a threaded outlet to allow water flow or test fluid insertion.

Are 100mm steel pipe stoppers available to hire for temporary site handovers?

Yes, we stock 100mm steel stoppers alongside our complete drain testing range in our nationwide hire fleet, available for fast delivery to your site.