Services to island

[Sunshine12]

What ducting/pipework do I need to lay in the 100mm concrete slab to get electric, gas & water to a kitchen island in the future?

Thanks

 

[Newboy]

1. Gas will need to be in copper tube wrapped to prevent corrosion ('Denso' tape) - the tube you lay in the screed will be the tube carrying the gas supply not a duct.
2. Water likewise - it's possible to put a duct in a later pull plastic supply pipework through but you will need long radius bends to prevent kinking as it rises up.
3. Electricity - solvent weld 32/40 mm pipe with 92.5°/87.5° bends will be OK.

Have you allowed for waste pipework?

I'd make sure that however you choose to run the services, the trades who will make the connections are happy with the arrangements before you pour the slab.

 

[Hugh Jaleak]

Gas man may not be happy to connect up pipework he has not installed, I would advise you choose a Gas Safe plumber to do the first fix on the gas pipework at least, then he should be happy to connect it up at a later date.