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Bushes, Unions and Bulkhead

An extensive variety of bushes, unions and locknuts available in many BSP and metric thread sizes. These hose fittings are available in stainless, brass and galvanised steel.

Our range of bushes, bulkheads, unions and locknuts includes options in all main British Standard Pipe (BSP) and metric thread sizes across a range of materials including brass, stainless steel, galvanised steel and nickel plated brass.

Shop locknuts, bushes, bulkhead connectors and unions at The Hosemaster today.

  • REF #1912

    BSPP Reducing Bush- Galvanised

    BSPP Reducing Bush- Galvanised

    From
    £2.02 INC VAT
    £1.68 EXC VAT

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  • REF #1920

    BSPP Equal Union - Galvanised

    BSPP Equal Union - Galvanised

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    £11.45 INC VAT
    £9.54 EXC VAT

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  • REF #1910

    BSPT Male / BSPP Female Equal Union - Galvanised

    BSPT Male / BSPP Female Equal Union - Galvanised

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    £8.99 INC VAT
    £7.49 EXC VAT

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  • REF #1819

    BSPP Equal Union - 316 Stainless Steel

    BSPP Equal Union - 316 Stainless Steel

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    £12.54 INC VAT
    £10.45 EXC VAT

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  • REF #1818

    BSPT x BSPP Bush - 316 Stainless Steel

    BSPT x BSPP Bush - 316 Stainless Steel

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    £3.34 INC VAT
    £2.78 EXC VAT

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  • REF #1830

    Lock Nut - 316 Stainless Steel

    Lock Nut - 316 Stainless Steel

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    £2.93 INC VAT
    £2.44 EXC VAT

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  • REF #1372

    UPVC Dark Grey Equal Tank Connector

    UPVC Dark Grey Equal Tank Connector

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    £10.26 INC VAT
    £8.55 EXC VAT

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Pipe bushes, unions and bulkhead fittings

These three fitting types handle different connection problems, but they share a common purpose: adapting or transitioning between thread sizes, pipe ends, or panel penetrations without compromising the integrity of the system.

A bush reduces a larger thread to a smaller one — useful when a port or body is tapped to one size and your line runs in another. Unions allow you to disconnect a pipeline without disturbing either end, which is important on systems that need periodic maintenance or replacement. Bulkhead fittings create a leak-free penetration through a panel or enclosure wall, with a nut and seal holding the fitting in place on each side.

All fittings here are available in brass as standard, with steel options across selected sizes. Thread forms cover BSP and metric to suit both UK-standard and European equipment.

If you need to adapt between thread forms — BSP to metric, for example — the adaptors range covers that. For sealing compound and PTFE tape to complete the installation, those are in the tools and accessories section.

Frequently Asked Questions

What is a pipe bush used for?

A pipe bush reduces a larger threaded port to a smaller thread size. It threads into the larger port and provides a smaller female or male thread on the other side. They are commonly used where a fitting or valve body is tapped larger than the pipe or hose you are connecting.

What is the difference between a union and a coupler?

A union connects two pipe ends and can be disconnected and reconnected without disturbing either pipe. It uses a nut in the centre to compress both ends together. A coupler typically refers to a push-fit or quick-release connection. Unions are the right choice where you need periodic access for maintenance or replacement.

What is a bulkhead fitting?

A bulkhead fitting passes through a hole in a panel or tank wall and creates a sealed connection on both sides. A nut on the back of the panel locks the fitting in place. They are used wherever a pipe or hose needs to penetrate an enclosure, tank, or cabinet.

Do you stock bulkhead fittings for delivery near me?

Yes. We deliver across England and Wales with free delivery on orders over £200. Most orders dispatched the same day for next-day arrival.