Automotive Unions and Connectors for Coolant, Fuel and Heater Hoses

Browse our range of high-quality aluminium and nylon unions designed to connect coolant, fuel, and heater hoses. This collection includes straight, 90°, and T-piece connectors in a variety of sizes — perfect for reliable plumbing in engine bays, heating systems and fuel lines.

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Latest Products

Instrument Voltage Stabiliser
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Instrument Voltage Stabiliser

Instrument Voltage Stabiliser
£24.00
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Electric Vacuum Pump Relay
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Electric Vacuum Pump Relay

12 volts.
£9.60
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£9.60
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Classic Style Paper Covered Aluminium Ducting 80mm I.D. - Car Builder SolutionsClassic Style Paper Covered Aluminium Ducting 30-100mm
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Classic Style Paper Covered Aluminium Ducting 30-100mm

SOLD BY THE METRE
£8.40
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G Clamps 50mm to 200mmG Clamps 50mm to 200mm
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G Clamps 50mm to 200mm

G Clamps
£4.20
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Single Relay Plug with Terminals

Single Relay Plug with Terminals

Durable 5-terminal relay plug with 1/4" female crimp terminals for secure connections in automotive/electrical applications. Easy installation, reliable performance.
£3.00
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£3.00
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Brake and Clutch Reservoir Bleeding Adapter

Brake and Clutch Reservoir Bleeding Adapter

RESERVOIR BLEEDING ADAPTER
£19.20
£0.00
£19.20
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3 Piece Locking Clamping Pliers Set For Flexible Hoses3 Piece Locking Clamping Pliers Set For Flexible Hoses

3 Piece Locking Clamping Pliers Set For Flexible Hoses

Will clamp between 6mm and 57mm hose.
£7.20
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£7.20
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3 Watt LED White/Red Rechargeable Headband Lamp

3 Watt LED White/Red Rechargeable Headband Lamp

USB charging cable included Up to 3 hours battery life
£7.80
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£7.80
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Demist Vent 87mm x 14mmDemist Vent 87mm x 14mm

Demist Vent 87mm x 14mm

ABS demist vent, 87mm x 14mm, fits 71mm x 8mm hole. Ideal for boats and caravans. Clears condensation.
£6.00
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Silver Chrome Paint AerosolSilver Chrome Paint Aerosol

Silver Chrome Paint Aerosol

This plated finish paint aerosol delivers a brilliant, very shiny silver finish. Easy to apply and perfect for various projects.
£13.20
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£13.20
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Large Internal Naca Duct Black 270mmLarge Internal Naca Duct Black 270mm

Large Internal Naca Duct Black 270mm

Can be bonded or riveted to body.
£19.20
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£19.20
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Naca Duct Internal Carbon Effect Small

Naca Duct Internal Carbon Effect Small

Can be bonded or riveted to body. 180mm x 145mm x 25mm high
£14.40
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£14.40
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Naca Duct Internal Carbon Effect Large

Naca Duct Internal Carbon Effect Large

Can be bonded or riveted to body. 235mm x 190mm x 45mm high.
£16.80
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£16.80
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360mm LED Interior Strip Light360mm LED Interior Strip Light

360mm LED Interior Strip Light

Overall size. 30mm x 23mm x 11mm high.
£30.00
£0.00
£30.00
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440 Amp Jump Start Posts

440 Amp Jump Start Posts

SOLD AS A PAIR
£24.00
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£24.00
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Fuel Tank Pick Up Pipes
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Fuel Tank Pick Up Pipes

Fuel tank pick up pipes
£24.00
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£24.00
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Smiths GPS Speed Sensor for Electronic SpeedometersSmiths GPS Speed Sensor for Electronic Speedometers

Smiths GPS Speed Sensor for Electronic Speedometers

Smiths GPS Speed Sensor for Electronic Speedometers
£162.00
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£162.00
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Smiths Inductive Speed Sensor for Electronic SpeedometersSmiths Inductive Speed Sensor for Electronic Speedometers

Smiths Inductive Speed Sensor for Electronic Speedometers

Smiths Inductive Speed Sensor for Electronic Speedometers
£86.40
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£86.40
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Copper Brake Pipe 22G 25Ft Roll

Copper Brake Pipe 22G 25Ft Roll

High-quality copper/nickel brake pipe in 3/16". Rated to 215 Bar, ensuring reliable braking performance.
£15.00
£0.00
£15.00
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Copper/Nickel Brake Pipe 22G 25Ft Roll

Copper/Nickel Brake Pipe 22G 25Ft Roll

High-quality copper/nickel brake pipe in 3/16". Rated to 215 Bar, ensuring reliable braking performance.
£21.60
£0.00
£21.60
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Engine Oil

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MOBIL Mobil 1 0W-20 Advanced Full Synthetic Engine Oil

Advanced full synthetic 0W20 motor oil. Optimised for fuel economy and long-lasting engine protection in hybrid vehicles.
£13.96
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CASTROL EDGE 0W-30 A5/B5 Engine Oil

Advanced 0W-30 motor oil boosts engine performance and fuel economy. Trusted by experts for ultimate protection and efficiency.
£13.96
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CASTROL EDGE 5W-40 Fully Synthetic Engine Oil

Advanced full synthetic engine oil for maximum performance and protection. Improves fuel economy and exceeds industry standards.
£13.96
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MOBIL Super 1000 X1 15W-40 Engine Oil

High-performance 15W40 motor oil. Provides excellent engine cleanliness, high-temperature protection, and wear protection. Suitable for various vehicles.
£33.95
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CASTROL Magnatec 10W-40 A/B Engine Oil

Advanced engine oil with DUALOCK molecules for non-stop protection and reduced warm-up wear. ACEA A3/B4, API SP.
£9.95
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MOBIL Super 2000 X1 10W-40 Engine Oil

High-performance 10W40 motor oil offering superior engine protection, sludge prevention, and cleanliness. Meets various industry standards.
£7.96
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CASTROL Magnatec 5W-30 A5 Engine Oil

Advanced engine oil with DUALOCK technology for superior protection during warm-up and stop-start driving. Suitable for modern vehicles.
£10.96
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CASTROL GTX 5W-30 RN17 Engine Oil

5W-30 RN17 engine oil. Superior sludge protection and advanced viscosity and thermal breakdown protection. Extends engine life.
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  • A/C Union #6 45 Degree - Car Builder Solutions

    A/C Union #6 45 Degree

    45-degree A/C union for connecting refrigeration/AC lines. Durable, leak-free, ensures efficient system performance.
    £9.60
    £0.00
    £9.60
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  • Brass 1/2" UNF" Male Union For 3/16 Pipe - Car Builder SolutionsBrass 1/2" UNF" Male Union For 3/16 Pipe - Car Builder Solutions

    Brass 1/2" UNF" Male Union For 3/16 Pipe

    A 1/2" UNF male brass brake pipe union for 3/16" copper or copper/nickel pipe. Durable, reliable, and easy to install.
    £1.80
    £0.00
    £1.80
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  • Single M10 x 1 Male Brake Union - Car Builder SolutionsSingle M10 x 1 Male Brake Union - Car Builder Solutions

    Single M10 x 1 Male Brake Union

    Durable plated steel brake union. Suitable for 3/16" copper/nickel lines. 18mm thread, 11mm hex. Reliable braking performance.
    £0.60
    £0.00
    £0.60
    (-0%)
  • Brass Union M10 x 1 Male to M12 x 1 Female - Car Builder Solutions

    Brass Union M10 x 1 Male to M12 x 1 Female

    Concave seat in female end.
    £9.00
    £0.00
    £9.00
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  • In-Line Connector 7/16" UNF Male to 3/8" UNF Male - Car Builder Solutions
    Out Of Stock

    In-Line Connector 7/16" UNF Male to 3/8" UNF Male

    Durable steel in-line connector with 7/16" UNF male and 3/8" UNF male threads. Secure, reliable connection.
    £8.40
    £0.00
    £8.40
    (-0%)
    Out Of Stock
  • Brass M10x1 Half Nut - Car Builder Solutions

    Brass M10x1 Half Nut

    Brass M10x1 half nut for BUBH brake bulkhead union. Durable, easy to install, ensures secure connection. 5mm thick, 7/16" hex.
    £1.20
    £0.00
    £1.20
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  • A/C #8 'O' Ring - Car Builder Solutions

    A/C #8 'O' Ring

    Essential A/C #8 'O' Ring for airtight sealing, ensuring optimal system performance and preventing leaks.
    £2.40
    £0.00
    £2.40
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  • Single 3/8" UNF Male Union - Car Builder SolutionsSingle 3/8" UNF Male Union - Car Builder Solutions

    Single 3/8" UNF Male Union

    Durable plated steel 3/8" UNF male union for 3/16" copper/nickel pipes. 11mm hex, 16mm thread depth ensures easy installation, secure connection.
    £0.60
    £0.00
    £0.60
    (-0%)
  • Steel Brake Bleed Screw M10 x 1 - Car Builder Solutions

    Steel Brake Bleed Screw M10 x 1

    High-quality steel M10 x 1 brake bleed screw, essential for brake maintenance and bleeding procedures.
    £1.20
    £0.00
    £1.20
    (-0%)
  • 3/8" UNF male to 1/8" NPT male union - Car Builder Solutions

    3/8" UNF Male To 1/8" NPT Male Union

    Connects 3/8" UNF male to 1/8" NPT male fittings for secure fluid or gas transfer in automotive and plumbing.
    £4.20
    £0.00
    £4.20
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  • A/C #10 'O' Ring - Car Builder Solutions

    A/C #10 'O' Ring

    Essential A/C #10 'O' Ring. Provides reliable sealing, preventing leaks. Durable and easy to install.
    £2.40
    £0.00
    £2.40
    (-0%)
  • A/C #6 'O' Ring - Car Builder Solutions

    A/C #6 'O' Ring

    Essential A/C #6 'O' Ring for preventing leaks and ensuring efficient cooling performance. Easy installation and durable.
    £2.40
    £0.00
    £2.40
    (-0%)
  • 7/16" unf to 10mm Fluid Fill Union - Car Builder Solutions

    7/16" UNF to 10mm Fluid Fill Union

    Brass 7/16" UNF to 10mm fluid fill union for master cylinders without reservoirs, ensuring a secure connection.
    £7.80
    £0.00
    £7.80
    (-0%)
  • Brass T Piece 7/16" UNF - Car Builder Solutions

    Brass T Piece 7/16" UNF

    Durable brass T piece connector with 7/16" UNF threads, concave seats, and easy installation. Ideal for plumbing and automotive use.
    £9.60
    £0.00
    £9.60
    (-0%)
  • ac-union-10-straight-car-builder-solutions

    A/C Union #10 Straight

    The A/C Union #10 Straight is designed for secure, leak-free connections in air conditioning systems, ensuring reliable performance.
    £9.60
    £0.00
    £9.60
    (-0%)
  • Stainless Steel 3/8" UNF Male 'T' Block With Mounting Tab - Car Builder Solutions

    Stainless Steel 3/8" UNF Male 'T' Block With Mounting Tab

    Durable stainless steel T-block with 3/8" UNF male thread and mounting tab. Ideal for various applications.
    £16.80
    £0.00
    £16.80
    (-0%)
  • A/C Union #10 45 Degree - Car Builder Solutions

    A/C Union #10 45 Degree

    45-degree A/C union for #10 tubing, ensuring a secure, leak-free connection in refrigeration systems.
    £10.80
    £0.00
    £10.80
    (-0%)
  • A/C Union #8 45 Degree - Car Builder Solutions

    A/C Union #8 45 Degree

    45-degree A/C union fitting for secure, leak-free connections in refrigeration and air conditioning systems.
    £10.80
    £0.00
    £10.80
    (-0%)
  • Brass Brake Bleed Screw 3/8" UNF - Car Builder Solutions

    Brass Brake Bleed Screw 3/8" UNF

    High-quality brass brake bleed screw, 3/8" UNF thread, ensures reliable brake system performance. Easy installation.
    £4.80
    £0.00
    £4.80
    (-0%)
  • Brass 7/16" UNF Male Blanking Plug - Car Builder Solutions

    Brass 7/16" UNF Male Blanking Plug

    Solid brass blanking plug for 7/16" UNF female ports. Prevents leaks, easy installation with 13mm hex. Ideal for hydraulic/pneumatic systems.
    £3.00
    £0.00
    £3.00
    (-0%)
  • Brass Adapter 3/8" UNF Male to M10 x 1 Male - Car Builder Solutions

    Brass Adapter 3/8" UNF Male to M10 x 1 Male

    32mm long.
    £4.80
    £0.00
    £4.80
    (-0%)
  • A/C #10 Charging Port - Car Builder Solutions

    A/C #10 Charging Port

    Durable and reliable A/C #10 Charging Port for efficient refrigerant transfer and optimal cooling performance.
    £24.00
    £0.00
    £24.00
    (-0%)
  • ac-union-8-straight-car-builder-solutions

    A/C Union #8 Straight

    Reliable A/C union connector for #8 lines, ensuring secure, leak-free connections and optimal system performance.
    £8.40
    £0.00
    £8.40
    (-0%)
  • In-Line Connector M10 Male to M10 Male - Car Builder Solutions

    In-Line Connector M10 Male to M10 Male

    Durable brass M10 male to M10 male connector, 34mm long with 11mm hex, ensures secure and reliable connections.
    £3.60
    £0.00
    £3.60
    (-0%)
  • A/C Union #10 Tight Angle 90 Degree - Car Builder Solutions

    A/C Union #10 Tight Angle 90 Degree

    90-degree A/C union fitting for tight spaces. #10 size, includes 'O' ring for leak-free seal. Durable and easy to install.
    £20.40
    £0.00
    £20.40
    (-0%)

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