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Can I connect a PVC Soil Pipe to a Cast Iron stack?

This is a common question. Many of our customers want to replace their old Cast Iron Soil Pipe with a new PVC system, but without the hassle of digging up the concrete to replace the drain connection. The answer is to cut off the cast iron at ground level, and make the connection with the specialy designed SP140 connector. 

The rubberised fins push inside the old pipe to make an airtight seal, and the new PVC soil pipe fits straight into the integral socket - job done! The SP140 is available in both Black and Grey options.

If your cast iron pipe is too small in diameter to accept the SP140 (this is rare but can happen), remove the fins and then try to push it in. If it fits without fins you will need to seal the joint with silicon sealant and ideally sand and cement.

 

SP140PVC Soil Pipe to Cast Iron Stack

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