Rubber Ultraflex Fuel Filler Neck Hose

E5/E10 Compatible Flexible Wrapped Finish

FFH038-ASH#0.25

£7.03

Delivery/Collection

Collect from Silicone Hose UK

Orders can be collected once you receive your ready-to-collect email.

Address

Silicone Hose UK

HolmeBank Business Park, Station Road
Unit 5
Mirfield WF14 8NA
United Kingdom

Get Directions

Opening hours

Monday	07:00 – 19:00
Tuesday	07:00 – 19:00
Wednesday	07:00 – 18:00
Thursday	07:00 – 18:00
Friday	07:00 – 17:00
Saturday	07:00 – 13:00
Sunday	Closed

Bank holidays may affect our opening hours and delivery times.

Returns

It's OK to change your mind
Return within 30 days for a full refund*. Learn More

Shop safely

Secure your shopping experience with various safe and trusted payment methods.

Shop safely with us

Rubber Fuel Filler Hose is a heavy-duty, oil- and fuel-resistant hose designed for transferring petrol, diesel, and other petroleum-based fuels in automotive, marine, and industrial applications. Constructed with a durable NBR (Nitrile Buna Rubber) inner tube, reinforced with a spiral steel wire helix, and protected by a tough CR (Chloroprene Rubber) outer layer, the hose provides outstanding strength, flexibility, and resistance to fuels, oils, and environmental conditions. Built to SAE-30R7 standards, it ensures reliable performance in demanding fuel handling systems. With an operating temperature range of -30°C to +85°C (and peaks up to +100°C), Rubber Fuel Filler Hose delivers long-lasting service in both static and dynamic installations.

Key Features:

Inner Layer: NBR (Nitrile Buna Rubber) for excellent fuel and oil resistance.
Reinforcement: Spiral steel wire helix for crush resistance and structural stability.
Outer Layer: CR (Chloroprene Rubber) for weathering, abrasion, and ozone resistance.
Operating Temperature: -30°C to +85°C (peak +100°C).
Working Pressure: 10 bar across available sizes.
Burst Pressure: 30 bar (3:1 safety factor).
Internal Diameter Range: 38 mm to 57 mm.
Wall Thickness: 5 mm to 6 mm depending on size.
Bending Radius: 200 mm to 280 mm depending on diameter.
Standard: SAE-30R7 compliant.

The Nitrile rubber inner tube ensures safe compatibility with petrol, diesel, and fuel blends, while the spiral steel helix reinforcement prevents collapse and kinking under suction or bending. The tough Chloroprene outer layer provides resistance to ozone, abrasion, and weathering, extending hose life in harsh working conditions. With a 3:1 safety margin between working and burst pressure, the hose is engineered for reliability and safety in critical fuel handling systems. Its flexibility allows for easy installation in confined engine bays and marine compartments.

Applications include automotive fuel filler necks, marine fuel systems, generator fuel connections, construction machinery, agricultural equipment, and general-purpose fuel transfer. Rubber Fuel Filler Hose is the ideal solution where strength, durability, and resistance to fuels and oils are essential for safe and efficient operation.

Specifications

Type: Fuel Filler Neck Hose
Material: Rubber
Colour: Black
Standard: SAEJ30R6
Working Pressure: 10bar
Bursting Pressure: 30bar
Coil Length: 1m

Size Guide

Inside Diametermm	Outside Diametermm	Wall Thicknessmm	Bending Radiusmm	Coil Weightkg
38	50	6	200	0.9
51	61	5	240	1.2
57	67	5	280	1.4

Measurements are nominal and may vary slightly.

How to measure ID

Measure the pipe, not the old hose

Heat and age make a used hose swell and go out of round. Take your reading across the metal outlet the hose slides onto — that measurement is your ID.

Use vernier calipers

Set the outer jaws across the widest point of the pipe. A tape measure round a curve reads low by a millimetre or two — enough to buy the wrong size.

Take three readings, keep the largest

Rotate 60° between each. If they disagree the pipe is oval; size to the biggest figure so the hose still seals.

Round to the nearest listed bore

Never go up: a bore wider than the fitting will not grip, whatever the hose is made of. If you land between listed sizes take the smaller bore, and secure it with a clip.

Order by ID, always. Every hose on this site is listed by internal diameter. OD is given for clearance only — it changes with wall thickness and ply count, so it is never the ordering size. On reducers, quote both ends, largest first.

Construction

1 · Outer cover

CR (Chloroprene Rubber)

Weathering, abrasion, and ozone resistance

2 · Reinforcement

Spiral steel wire helix

Crush resistance and structural stability · 10 bar across available sizes · 30 bar (3:1 safety factor)

3 · Inner liner

NBR (Nitrile Buna Rubber)

Excellent fuel and oil resistance · -30°C to +85°C (peak +100°C)

Conforms to SAE-30R7.

Rubber Ultraflex Fuel Filler Neck Hose

E5/E10 Compatible Flexible Wrapped Finish

Fuel rated. Properly certified.

Nitrile and fuel-resistant rubber, built to a published standard.

INTERNAL DIAMETERS

38mm to 57mm

RATED

−30°C to +85°C

WORKING PRESSURE

10 bar across all sizes

BUILT TO

SAE J30 R6

SOLD BY

The metre

Frequently Asked Questions.

Answers to the questions we’re asked most about sizing, fitment and performance.

Still can't find your answer?

What is it used for?

Connecting a vehicle's filler neck to the fuel tank. It is a large-bore hose with a steel wire helix so it will not collapse or kink as it curves round the bodywork.

What size and length do I order?

Order by internal diameter, matched to the outside diameter of the pipe stub or spigot it slides over. Measure the pipe with vernier callipers rather than the old hose, which stretches in service and reads large. Available in internal diameters from 38mm to 57mm, lengths from 0.25 Metre to 1 Metre. Full coils work out considerably better value per metre than cut lengths.

What standard is it built to?

It is manufactured to SAE J30 R6. Buying to a recognised standard matters here - it means the construction, pressure rating and performance have been benchmarked rather than simply described.

Is it compatible with E5 and E10 petrol?

Yes - the nitrile-based compound is formulated for modern ethanol-blended fuels as well as diesel and oils. Ethanol attacks unsuitable rubber from the inside, so an older line can look perfectly sound externally while breaking down internally and shedding debris into the fuel system.

How do I know when it needs replacing?

Squeeze it. Hard and brittle, or spongy and swollen, both mean it is done. Look for surface cracking when you flex it and crusty residue or staining round the clips, which indicates seepage. Replace on condition rather than waiting for a failure.

How should it be secured?

Proper hose clips, one at each end, positioned squarely over the barb or spigot. Support long runs with rubber-lined P-clips so the hose cannot chafe against a bracket, panel or wiring loom, and keep it clear of exhaust components.