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How to install a new drainpipe?

Simeon1
Finding My Feet

How to install a new drainpipe?

Hi All,

Any advice would be great on how to install a new pvc drainpipe. (See below images) I have removed an old metal drainpipe which has rusted and would like to replace with a new PVC option.

Can I just use an adapter to connect the rectangular gutter drop section with a new circular PVC pipe? If so what adaptor should I use?

Measurements of metal gutter drop is 95x45mm (height 65mm).

Thanks

Screenshot 2025-09-14 at 10.16.03 am.pngScreenshot 2025-09-14 at 10.16.15 am.png

EricL
Bunnings Team Member
Bunnings Team Member

Re: Help with installing a new drainpipe

Hello @Simeon1 

 

Just a friendly reminder that any plumbing work to be carried out must be done by a licensed plumber for safety and compliance.

 

Generally speaking, a Holman 100 x 80 x 90mm PVC Stormwater Downpipe Adaptor is used to covert from a rectangular downpipe to a circular one. It would be better to install a loose adapter such as this one so that there will be no chance of getting an airlock at the top. I recommend looking at using standard 90mm PVC pipe in combination with Kinetic 90mm DWV Pipe Saddle Clips. Please make sure to use Protek 125ml Type N Blue Cement Solvent to lock all the PVC parts together.

 

If you need further assistance, please let us know.

 

Eric

 

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