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Flexible Steel Conduit Diameter?

AncientMariner
Is the quoted diameter for flexible steel conduit the internal or external diameter? Or is it a sort of nominal diameter which cannot be measured?


Simply I am looking to protect a MDPE water supply pipe beneath a suspended floor from whatever may live under there - putting a Lidl endoscope through a hole found a dead rat..


What has come to mind is flexible steel conduit, MDPE water pipe is 25mm outside diameter, so would certainly fit inside 40 mm flexible steel conduit, but would it go through 32 mm conduit?  It is only the last 2 or 3 metres which will need protecting. The ends will be sealed, especially in the case of if I had to use 40mm.

Thanks.


Clive

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    I would have preferred 32mm flex conduit, but may have been tight over 25mm OD MDPF, certainly if we were usuing 20mm OD MDPF, then no problem.


    Interestingly in my search for some cheap flex conduit, I found some on eBay from a supplier 40mm OD 5 metre at £51.56p free delivery. On trying Google, found Amazon offering 40mm OD 5 metre at £37.88 again with free delivery, or next day for £10.00 extra. 


    Strange thing though was that both were from the same supplier, Trallo. I went for the free delivery expecting to receive it this coming Saturday or Monday and it arrived DPD this afternoon!  So well pleased.


    Clive
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  • 0
    I would have preferred 32mm flex conduit, but may have been tight over 25mm OD MDPF, certainly if we were usuing 20mm OD MDPF, then no problem.


    Interestingly in my search for some cheap flex conduit, I found some on eBay from a supplier 40mm OD 5 metre at £51.56p free delivery. On trying Google, found Amazon offering 40mm OD 5 metre at £37.88 again with free delivery, or next day for £10.00 extra. 


    Strange thing though was that both were from the same supplier, Trallo. I went for the free delivery expecting to receive it this coming Saturday or Monday and it arrived DPD this afternoon!  So well pleased.


    Clive
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