Rubber Coupling Hose Joiner 50/75/100mm Lengths

-30°C to +120 SAEJ20R3 Glycol Rated

RRC005-ASH#1

£2.12

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Address

Silicone Hose UK

HolmeBank Business Park, Station Road
Unit 5
Mirfield WF14 8NA
Vereinigtes Königreich

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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.

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Rubber Coupling Hose Joiner is a durable straight connector designed for joining two lengths of pipework or hose in automotive, marine, agricultural, and industrial systems. Manufactured from high-quality rubber with a smooth internal bore, the joiner provides a secure and reliable link between hoses while maintaining flexibility and vibration resistance. Available in a wide range of lengths from 50 mm up to 950 mm, it offers versatility for both short joiner connections and extended coupling requirements. Its robust construction ensures long service life in coolant, air, and general fluid transfer applications, making it a practical choice for both maintenance and custom installations.

Key Features:

Material: High-grade rubber for durability and resilience.
Construction: Solid rubber coupling with smooth bore for secure sealing.
Lengths Available: 50 mm to 950 mm for a wide range of system requirements.
Flexibility: Allows for vibration absorption and minor misalignment.
Compatibility: Suitable for use with coolant, air, and general fluid systems.
Installation: Simple fitment with standard hose clamps.
Applications: Ideal for automotive, marine, agricultural, and industrial pipework.

The rubber coupling hose joiner is engineered to deliver reliable service in demanding environments. Its solid rubber body resists wear, cracking, and environmental stress, while its flexibility helps absorb vibration and movement within the system. With lengths available from 50 mm to 950 mm, it can be selected for compact joiner applications or longer couplings, offering flexibility across a range of system layouts. Designed for straightforward installation, the joiner integrates easily with reinforced hoses and pipework, making it a cost-effective and long-lasting solution for system repairs, modifications, or custom builds.

Applications include joining coolant and air hoses in automotive systems, linking pipework in marine and agricultural equipment, and providing secure hose connections in industrial machinery. Rubber Coupling Hose Joiners are widely used in maintenance, performance upgrades, and fabrication projects where flexible hose linking is required.

Specifications

Type: Coupling Hose
Colour: Black
Standard: SAEJ20R3

Size Guide

Inside Diametermm
5
6
8
10
13
16
19
22
25
28
30
32
35
38
40
45
48
51
55
60
63
70
76
90
102

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

Material

High-grade rubber

Durability and resilience

Construction

Solid rubber coupling with smooth bore

Secure sealing

Rubber Coupling Hose Joiner 50/75/100mm Lengths

-30°C to +120 SAEJ20R3 Glycol Rated

Joins the run. Rubber throughout.

A smooth-bore rubber coupling for joining two lengths of pipework.

INTERNAL DIAMETERS

5mm to 102mm

LENGTHS

50, 75 or 100mm

MATERIAL

Rubber

BORE

Smooth

BUILT TO

SAE J20 R3

Frequently Asked Questions.

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

Still can't find your answer?

What is a coupling joiner for?

Joining two pipe stubs or two lengths of hose - repairing a split section without replacing a whole moulded hose, extending a coolant run, or adapting between hard pipes on a custom installation.

What sizes and lengths do you supply?

Available in internal diameters from 5mm to 102mm, lengths from 50mm to 100mm. Order by internal diameter to match the outside diameter of the pipe stubs you are joining. If the two stubs are different sizes you need a reducer rather than a straight coupler.

How much pipe should be inside it?

At least 25mm engaged at each end on smaller bores and proportionally more on larger ones, with the clip sitting squarely over the supported section. A 50mm coupler joining two stubs gives roughly 25mm each side, which is the minimum - if you have room, a longer one makes a more secure joint.

What is it rated for?

EPDM rubber built to SAE J20 R3, -30C to +120C, glycol rated for standard antifreeze mixes. It is not suitable for fuel or oil - hydrocarbons attack EPDM.

Rubber or silicone coupler?

Rubber is the like-for-like choice for a standard cooling system, cheaper, and matches the feel of the original hoses. Silicone is the upgrade: much higher temperature capability, it will not perish or harden with age, and it is available in colours.

What clips should I use?

Stainless worm drive clips, one per end, positioned over the pipe stub rather than overhanging it. Nip them firmly without crushing the rubber. On a high-vibration installation or a larger bore, a heavier clip band is worth the upgrade.