FlexEJ Products People

24hr Shipping
On all stock items ordered.
Mon-Thur by 2pm, 10am Fridays

Design & Manufacturing
Full in-house design & manufacture to EN / ASME / PED.

ISO14001 Accreditation
FlexEJ has an accredited Environmental Management System.

FlexEJ Product Range

Pipe Expansion – we manufacture and supply rubber bellows, metal bellows, metal hose, PTFE bellows. Pressure Fabrications – we manufacture pressure vessels, HVAC fabrications, pressure envelopes, packages. From stock, Web Shop, configured, or full manufacture to order. How can we help?

Pipe Expansion, Pressure Fabrications

Application, design and manufacturing

Packaged Plate Heat Exchangers

Custom, Stock and OEM Pipe Expansion Joint Manufacturing


50kW to 1200kW. 100°C The new FlexEJ PhexPak Packaged Plate Heat Exchanger range is designed to work across a vast range of applications, and across multiple sectors. Designed and manufactured in the UK, and utilising only the very best components, this product offers high quality, and real value for money.

Bellows & Expansion Joints

DN12 to DN1000 Expansion Joints


Off the shelf and configurable FlexEJ stocks a wide range of metal and rubber bellows many of which you will find in our Web Shop together with components which we can quickly build up into thousands of different configurations to suit your individual application. Call, email, chat…we are here to help find the best solution for your application.

Pipe Expansion Joint Manufacture

Metal and Rubber Pipe Expansion Joint Manufacturing


Manufacture of bespoke joints to over DN3600 FlexEJ has full in-house design, engineering and manufacture capability for metal and rubber expansion joints. We are PED accredited and will work to your specification and design codes. FlexEJ manufactures for nuclear power plants, pharmaceutical facilities, desalination plants, refineries…all demanding the highest levels of product quality, NDT and documentation.

Pressure Vessels

Manufacture Pressure Vessel Manufacturing


Manufacture to order FlexEJ designs and manufactures pressure vessels at our UK fabrication plant, specialising in units with demanding technical and quality requirements in a wide range of metals including Carbon Steel, Stainless Steel, Chrome Moly (CrMo) and Duplex. We are PED accredited and our welders are qualified under both EN and ASME codes. We offer both build to print and full design with manufacture.

Metal Hose Assemblies

DN6 to DN150 Metal Hose Assemblies


Manufacture to order FlexEJ manufactures high quality metal hose assemblies using Stainless Steel and Nickel Alloy core tube with external braid as required for the pressure – typically single or double. Each assembly can be supplied with a very wide range of end fittings to match your requirements along with internal liners or external jackets if required.

Dosing Pots

3.5L to 25L Dosing Pots


FlexEJ’s own UK manufacture FlexEJ’s dosing pots are manufactured by us in the UK and are available for next day delivery from our Web Shop. If you require something non-standard please get in touch.

Air & Dirt Separators

DN40 to DN200 FlexEJ Air & Dirt Separator


For use in both heating and cooling systems FlexEJ’s air and dirt separators are manufactured by us in the UK and are available for next day delivery from our Web Shop. The range covers most requirements but if you need something non-standard please get in touch.

Low Loss Headers – Hydraulic Separators

DN32 to DN150 Low Loss Headers


Compact, value engineered FlexEJ can manufacture bespoke low loss headers (hydraulic separators) to meet your system needs if our range of standard products is not suitable. The standard range is all UK made in our factory and available for next day delivery from our Web Shop.


Projects and OEM manufacturing partnerships Design and Engineering


Full in-house capabilities FlexEJ has a long history of project execution for large, internationally recognised end-users and contractors. We have robust internal processes to control design, materials and documentation ensuring on time delivery and compliance. Our engineering team can design from scratch to meet your specification or work with existing calculations, concepts or drawings. We also work with a number of OEMs on a long term basis as their manufacturing partner. We very much welcome the opportunity to develop this type of relationship to bring exceptional added value for our customers.


Our new shop location FlexEJ Direct Shop


New, expanded, improved shop FlexEJ’s new Web Shop is now available through this web site and offers a much greater range of products all with 24 hour delivery. HVAC and Elaflex rubber bellows, HVAC metal bellows, Dosing Pots, Air & Dirt Separators, Low Loss Headers plus bolting kits and gaskets all from the Web Shop.

Can't see what you want? Need help?
Call us. Or use Live Chat.

For instant advice. We can custom-design and engineer almost any expansion joint you need for delivery in the UK or worldwide. Call our expert team on +44 (0) 1384 881188 Or email us sales@flexej.co.uk

Frequently Asked Questions

A. Yes. FlexEJ holds a large stock of the most popular sizes and types of Elaflex rubber bellows as well as our HVAC value bellows range. We also hold stock of the most popular metal bellows for HVAC. Many of these items are available on 24hr delivery from our online web shop. We can also manufacture to order. For sales assistance please contact us or use our Live Chat facility.

A. Our Flange Finder contains details for many common flanges. Typically, to be able to make the identification you need to know the bore size or outside diameter and number of bolts. For technical assistance contact us or use our Live Chat facility.

A. Please refer to our guidelines for installation, anchoring & guides. They are available in the Downloads section of this website: Elaflex Rubber Bellows Installation Instructions and FlexEJ Metal Bellows Installation Instructions. For technical assistance please contact us or use our Live Chat facility.

A. FlexEJ Value HVAC and Elaflex rubber bellows are stocked in a number of standard lengths from 105mm to 300mm, a summary of lengths, diameters and types can be found on each product page. We also offer fully engineered rubber bellows which are available in custom lengths to suit the application. You can use our bellows finder to find the most suitable product. For technical assistance please contact us or use our Live Chat facility.

A. Yes, if you have the details we can normally offer an equivalent, our FAQ here gives the information we will need for a full selection. For technical assistance please contact us or use the Live Chat link on this page.

A. To identify an existing expansion joint we need to know: nominal bore, overall length and flange type plus service, temperature, pressure and required movement if known. Try our Flange Finder to help identify the flange and you can send us a picture of the existing part using the Contact us form. For technical assistance please contact us or use the LIVE CHAT link on this page.

A. Yes, our Elaflex ERV-R and ERP rubber bellows have WRAS, DVGW and ACS approval for drinking water, see our Elaflex pages for more information. The Safetech manufactured to order rubber bellows can be supplied with WRAS approved EPDM linings. Our MRCA copper ended metal expansion joints also have WRAS approval. For technical assistance please contact us or use the LIVE CHAT link on this page.

Please visit our full FAQ page to see all our frequently asked questions.