20mm mdpe hot water under patio? Yes or no ?

[Dickymint]

Hi everyone
Whilst having an extension built 15 years ago I ran x2 20mm mdpe pipes under the patio to run hot and cold from my existing system to the extension. The time has come to utilize the extension and I would like to start preparing the services in the extension.

I have read that mdpe pipe is not suitable for hot supply. The run is approx 4m under the patio and would return to copper within 300mm of entering the extension. Am I doomed to fail for such a short run or any other suggestions would be welcomed.
thanks dickymint

 

[ShaunCorbs]

Did you insulated the pipe work?

 

[PETE 123]

can rats and mice chew pipes.

 

[Dickymint]

Did you insulated the pipe work?

No the pipe isn’t insulated. another option I thought of was to feed 10mm copper down the mdpe pipe which would be a haste and not sure I could achieve it either. I could just put the mdpe joints on and pressure test It?

 

[ShaunCorbs]

Waste of time putting a hot service in as the ground will absorb most of the heat

 

[Dickymint]

can rats and mice chew pipes.

No they can’t get access to the pipes

 

[king of pipes]

Abandon the hot supply and fit a electric water heater in the extension utilising the cold supply .

 

[Dickymint]

Abandon the hot supply and fit a electric water heater in the extension utilising the cold supply .

Thanks king of pipes I think I will go for the heater option. Thanks

 

[king of pipes]

Probably the best way forward Dicky 😉 regard kop