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Compression Fittings

Compression pipe fittings for use with hot and cold systems in home and industrial applications, preferred by installers for use on copper and plastic pipes.

A compression fitting is a fitting used in plumbing to join two tubes together. As the name suggests, a compression fitting is composed of an outer compression nut and an inner compressor ring or ferrule.

Well, you’ll find all of those components and everything else related to compression fitting here.

Whether you’re working on a hot or cold system or in a domestic or industrial context, The Hosemaster’s range of compression fittings will have something for you.

Shop compression fittings at The Hosemaster now.

  • REF #2537

    Metric Internal Tube Support

    Metric Internal Tube Support

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  • REF #1548

    Male Metric Studs

    Male Metric Studs

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  • REF #1549

    Female Metric Studs

    Female Metric Studs

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    £3.21 EXC VAT

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  • REF #1321

    Metric Compression Hosetail

    Metric Compression Hosetail

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    £13.46 INC VAT
    £11.22 EXC VAT

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  • REF #1573

    Metric Brass Barrel Olives

    Metric Brass Barrel Olives

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  • REF #1550

    Straight Metric Connectors

    Straight Metric Connectors

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  • REF #1551

    Male Stud Metric Elbows

    Male Stud Metric Elbows

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  • REF #1564

    Metric Reducing Coupling

    Metric Reducing Coupling

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  • REF #1558

    Brass Metric Olives

    Brass Metric Olives

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  • REF #1557

    Nickel Plated Metric Nuts

    Nickel Plated Metric Nuts

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  • REF #1464

    Imperial Compression Olive

    Imperial Compression Olive

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  • REF #1586

    Imperial Reducing Coupling

    Imperial Reducing Coupling

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    £10.87 EXC VAT

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  • REF #1584

    Imperial Equal Ended Coupling

    Imperial Equal Ended Coupling

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    £9.30 EXC VAT

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  • REF #1598

    Imperial Universal Compression Olive

    Imperial Universal Compression Olive

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    £0.47 EXC VAT

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  • REF #1582

    Imperial Female Stud Coupling

    Imperial Female Stud Coupling

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    £10.84 INC VAT
    £9.03 EXC VAT

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  • REF #9103

    Metric Bulkhead

    Metric Bulkhead

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Compression fittings for copper and plastic pipe

A compression fitting makes a leak-free joint without heat, solder or adhesive. The fitting body compresses a soft ring — the olive — against the pipe outer diameter as the nut is tightened, creating a mechanical seal that holds under working pressure.

They are the practical choice for most copper and plastic pipe installations where a permanent soldered joint would be more trouble than it's worth — maintenance runs, accessible pipework, and installations where you may need to dismantle and reassemble the joint in future.

The key dimension is the pipe OD. Compression fittings are sized to the outer diameter of the pipe you are working with, not the bore. Common sizes in UK domestic and light commercial work are 15mm and 22mm copper; industrial and heating applications also use 28mm and above.

For plastic pipe, confirm the pipe is suitable for compression fittings — not all types are, particularly softer plastics that can distort under compression. Insert supports are available where the pipe wall is too thin to hold its shape without reinforcement.

The range covers straight couplers, elbows, tees and stop ends across standard sizes.

Frequently Asked Questions

Do compression fittings work on plastic pipe?

Yes, on most types. Plastic pipe with sufficient wall stiffness — semi-rigid polyethylene, MDPE, and most barrier pipe — works with standard compression fittings. Very soft plastics may need a brass insert support inside the pipe end to maintain the circular section under compression.

What is an olive in a compression fitting?

The olive is the soft metal ring that sits between the fitting body and the nut. As the nut is tightened, the olive is compressed against the pipe OD and the fitting body, forming the seal. It is a single-use component — once a joint has been made and the olive deformed, use a new olive if you need to remake the joint.

Can I reuse a compression fitting?

The fitting body and nut can be reused if undamaged. The olive should be replaced, as it deforms permanently when first compressed. Reusing an old olive risks a weak or leaking joint.

Do you deliver compression fittings near me?

Yes. We deliver across England and Wales with free delivery on orders over £200. Single fittings and small quantities are welcome — no minimum order.