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specialist knowledge.  

specialist products.

​delivered NEXT DAY.

flexible ISOFLOW pre-insulated pipe.  fewer joints, faster install.

/ISOFLOW pre-insulated heating pipeHEATING

ISOFLOW quadruple pre-insulated pipe for heating and hot waterQUADRUPLE

ISOFLOW pre-insulated hot water pipe, WRAS approvedHOT WATER (DHW) WRAS

ISOFLOW pre-insulated cold water pipe, WRAS approvedPOTABLE COLD WRAS

 
Clamp type fittings for pre-insulated pipeFITTINGS


Accessories for pre-insulated pipeANCILLARIES

QUICK QUOTE REQUEST FORM:

Please include diameter, length and type of pipe required (if known), along with the application e.g. remote ASHP.  

If we require further info we will contact you to ensure you receive a quotation for the correct product.


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Thankyou, your enquiry has been received and we will return a quotation shortly.  

If we require further info we will contact you to ensure you receive a quote for the correct product.

How flexible is ISOFLOW pre-insulated pipe?

Very.  Take our super insulated 32mm double in a 160mm duct - it has a 500mm bend radius that's easy to achieve with one pair of hands.  Designed specifically to reduce bend radius meaning the pipe is simply curved out of the ground - no underground elbows required.  Refer to tech specs for the bend radius for your specific product.

Does the system comply?

ISOFLOW pipe is manufactured in accordance with BS EN 15632 Parts 1 and 3, and our cold and DHW potable pipe is WRAS approved. Insulation thickness requirements for heat-loss compliance (BS 5422 / Part L) vary by pipe size and application

What's the lead time?

Most sizes 25mm to 63mm are available for next day delivery if ordered before midday.  Above 63mm approx. one week, please call to check the specific product you require.

How good is the heat retention?

Excellent.  Take our 32mm double in a 160mm duct - only 7.7watts per metre heat loss at typical ASHP flow/return temps of 45C/35C.

Do the fittings require special tools?

No.  Our clamp type fittings use a stainless steel bolt - a spanner or socket set is all you need.

FAQs

ORDER ONLINE           CONTACT/QUOTE REQUEST FORM
Can we buy direct?

Yes.  Purchase via the website or give us a call to discuss your requirements and we will send you a quotation.

Pre-Insulated Pipe Systems UK | Flowsupplies

Flowsupplies are specialist suppliers of pre-insulated pipe systems for the efficient distribution of heating, hot and cold water in underground pipe networks. Our solutions are designed to reduce heat loss, improve energy efficiency, and simplify installation through flexible pipe systems and a comprehensive product range.

Key Benefits of Isoflow Pre-Insulated Pipe Systems:

  • Flexible pre-insulated pipe for easier installation and fewer underground joints

  • Next day delivery on cut-to-length pre-insulated pipe from stock

  • Wide range of pipes, fittings and ancillary components for complete system compatibility

  • Durable, high-performance systems manufactured to BS EN 15632 standards

  • Advanced manufacturing ensures consistent product quality and reliability

Whether you’re an installer, M&E contractor, housing developer or construction company, Flowsupplies provides reliable pre-insulated pipe solutions backed by expert advice and fast delivery across the UK.