Cuitting channels into concrete slab for plumbing and electrics

[DerMitchie]

We are having to cut out channels in our existing kitchen floor slab for a new kitchen island.

I will need to place an electric feed for the sockets; cold feed, hot feed and a gas pipe. I will also have to re-do some drainage so will dig out for that and re-cover.

So I guess I'm keen on tips/suggestions with regards to

1. depth of channel(s)
2. Plumbing: can I bury pushfit/speedfit type plastic pipes/connectors in concrete for hot/cold - do they need to be lagged/insulated?
3. Gas: The plumber will place that pipe and connect etc. Any advice?
4. Electrics: What type of ducting should I use, if any? It's just one ring main.
5. Screed: What mix/material should I use?
6. DPM - is this required? Not sure if one is there as it's an old extension.

 

[sxturbo]

1. depth of channel(s) - whatever depth you need
2. Plumbing: can I bury pushfit/speedfit type plastic pipes/connectors in concrete for hot/cold - do they need to be lagged/insulated? copper, and lagged
3. Gas: The plumber will place that pipe and connect etc. Any advice? make sure the calcs are done correctly to determine pipe diameter from gas meter, it may require upgrading to 28mm

6. DPM - is this required? Not sure if one is there as it's an old extension. my house was built in early 70's and has dpm, so i imagine it will, whatever you damage you must replace

 

[DerMitchie]

1. depth of channel(s) - whatever depth you need
2. Plumbing: can I bury pushfit/speedfit type plastic pipes/connectors in concrete for hot/cold - do they need to be lagged/insulated? copper, and lagged
3. Gas: The plumber will place that pipe and connect etc. Any advice? make sure the calcs are done correctly to determine pipe diameter from gas meter, it may require upgrading to 28mm

6. DPM - is this required? Not sure if one is there as it's an old extension. my house was built in early 70's and has dpm, so i imagine it will, whatever you damage you must replace

Just out of interest, why Copper and not plastic? In my previous property the builder used plastic.

 

[Agile]

From memory, plastic gas pipe should not be used inside a property because it would melt and let the gas out if there was a fire!

 

[baldykev]

I would only use plastic for hot and cold supply's if no joints are under screed.