With over a decade of experience in manufacturing cast iron radiators, we’ve assembled tens of thousands of units for homes across the UK and beyond. One of the most important—and often overlooked—details when ordering a cast iron radiator is choosing the correct connection type.
Cast iron radiator end caps are not interchangeable. This is because they feature both left-hand and right-hand threaded connections, so the setup must match your specific plumbing requirements. Below, we explain the three most common types of radiator connections:
1. BBOE – Bottom Bottom Opposite Ends
This is the standard UK configuration and stands for Bottom Bottom Opposite Ends. It means:
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The flow valve is positioned at the bottom on one end.
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The lockshield valve is installed at the opposite bottom end.
Unless you specify otherwise, all of our radiators are assembled in this BBOE format. If you're unsure what you need, this is likely the setup you’re looking for.
📌 Important: If your system does not require BBOE connections, let us know at the time of ordering to avoid delays or compatibility issues.
2. TBSE – Top Bottom Same End
Common across Europe, TBSE stands for Top Bottom Same End. In this configuration:
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Both the flow and return connections are on the same end, one at the top and one at the bottom.
If your installation requires TBSE connections, please contact us on 01723 321 000 before placing your order. This setup requires a different set of end caps to ensure proper function and sealing.
3. TBOE – Top Bottom Opposite Ends
Another option is TBOE, or Top Bottom Opposite Ends. As the name suggests:
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The inlet is positioned at the top on one end.
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The outlet is positioned at the bottom on the opposite end.
While less common in the UK, some systems are configured this way for specific heating requirements or design preferences. Again, this must be specified in advance so we can assemble the radiator accordingly.
Why Connection Type Matters
Choosing the correct radiator connection type ensures your heating system performs efficiently and avoids costly delays or modifications during installation. If you're unsure which configuration is right for your setup, our team is always happy to help.
📞 Need advice? Call us on 01723 321 333 or email info@periodstyle.co.uk
