---
title: Plastic and copper plumbing systems - Your questions answered
description: Our Hep2O push-fit plastic plumbing system has many unique features, one being that it can be used in conjunction with copper plumbing systems. 
---

[Wavin UK Blog ](https://blog.wavin.com/en-gb)

# [Plastic and copper plumbing systems - Your questions answered](https://blog.wavin.com/en-gb/plastic-and-copper-plumbing-systems-your-questions-answered)

 Written by [Admin](https://blog.wavin.com/en-gb/author/admin) | Nov 20, 2024 11:00:00 PM

** Our Hep2O push-fit plastic plumbing system has many unique features, one being that it can be used in conjunction with traditional copper plumbing systems.**  We’re often asked how the two systems can work together, so we've pulled together our most frequently asked questions to help you out. 

Do you manufacture a lead to Hep2O adaptor?No. Our suggestion would be to use a leadlock fitting (readily available in builders merchants – use our [Stockist Locator to find your local branch](http://stockist.wavin.co.uk/)), which is a compression fitting to connect lead pipe to copper pipe.

### Can I use Hep2O in soft water areas?

Yes, unlike copper, no matter how soft (acidic) the water is it will not corrode the HepO pipe.

### Are Hep2O 28mm fittings compatible with old 1" copper pipe?

No. To adapt from 1″ copper pipe to 28mm Hep O they need to use a 1″ to 28mm copper adaptor.

### Can I use Hep2O fittings on soft copper?

No, this isn’t possible.

### Can I use Hep2O on an oil boiler?

Most boilers have a control stat that limits the temperature to 82deg c and the limit stat would operate at 95-100deg c.

If the limit stat is above this level (from manufacturers' data) it probably means that the boiler has a high thermal mass and will continue to transfer heat from the heat exchanger to the water even after the boiler has ceased firing (thermal inertia).

### What are the recommendations for lagging Hep2O?

This is exactly as it would be for copper and is dependent on the thermal conductivity in w/(mk) of the insulating material.

For example, externally for a 15mm pipe, this would be 27mm for a material with a conductivity of 0.035 or 100mm with thermal conductivity of 0.07, so refer to the insulation supplier.

### Is Hep2O suitable for use on a Hager cooker or Aga?

No. Due to the uncontrolled temperature, the cooker has the potential to reach excessive temperatures. Copper must be used.

### Does Hep2O form condensation like a copper pipe?

Not to anything like the same degree.

### Does Hep2O require insulating?

Yes, Hep O should be insulated in exactly the same way and to the same thickness as copper.

### Is there a Hep2O fitting available that goes straight onto a thermostatic radiator valve such as a Danfoss?

Hep O will fit directly into most TRVs and pipe support should be used as with compression fittings. You could also convert Hep O to something else (copper, etc.) via compression.

### Can I convert old ¾" imperial copper to 22mm Hep2O?

Yes, simply use the HD3A/22 adaptor.

### What do I need to adapt from old imperial ½" copper to 15mm Hep2O?

An HD1/15 – 15mm straight connector will fit onto the old imperial pipe so you can convert to 15mm HepO.

### Can I use Hep2O to carry oil?

No, regulations state soft copper must be used for this purpose.

### Can I use a 15mm Hep2O barrier pipe as a discharge pipe from a boiler safety valve?

No, this has to be copper.

 

Request a Sample Pack: 

[View full post](https://blog.wavin.com/en-gb/plastic-and-copper-plumbing-systems-your-questions-answered)

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