Conduits in concrete slab - making it all work

[Benpointer]

52 minutes ago, saveasteading said:

Yes it is that simple. a hole in a block is to difficult, so either shunt it up to touch, or cut a alice off. then you have a gap remaining but can pop a piece of ply over it and infill with hand mixed concrete or some leftover. The ply is left in place for ever.

 

 

For clarity. Grey water is the kitchen and laundry drainage and it goes in with the sewage to the treatment tank.

Rainwater should not go there for several reasons. It dilutes the sewage and pushes it through too quickly, overloads the soakaway, and is wasted whereas it could go elsewhere

Thanks on both counts.  Got it!  Were we live the rainwater is pretty clear and not at all grey but I was not planning on pushing it through the STP.  Thanks for the clarification.

[saveasteading]

7 minutes ago, Benpointer said:

the rainwater is pretty clear and not at all grey

Rainwater is not called grey water even in filthy cities.

 

BTW the grey water and sewage may have bleach in it from your cleaning products, and tablets, which will inhibit the bugs in the digester, so try to minimise it.

[Spinny]

Outside tap(s) ?

Outside socket(s) ? (I even decided to put a cable in for a socket half way down the garden - plug in a pizza oven, hedge cutter, electric lawnmower etc.)

Outside lights that need to be wired through the wall ?

Audio Visual stuff ? (Got the builders to put conduit in so I could run Optical HDMI, cat6, coax and speaker cable under the floor from the planned TV location to a space in the utility for router, distribution amplifier, etc)

Any wired heating thermostats ?

Cat 6 Network points anywhere ?

Secondary waste/drain pipe in case the Mrs wants a new kitchen in 10 years with the sink on the other side ?

Aerial or satellite cable ?

wired video doorbell ?

cables to anywhere for LED strip lighting ?

Edited April 18 by Spinny

[Spinny]

POTS telephone cable ?

[Alan Ambrose]

What kind of duct sizes are people using?

[Bancroft]

On 17/01/2025 at 13:31, Gibdog said:

May I ask what the solar conduit is? Are your panels not on the roof..?

 

And your broadband - is that with Virgin by any chance? Are you using the same duct as electrical cable..?

Apologies - missed your post.

 

Solar conduit is just the cable in from solar panels into the house as we're mounting them on the carport roof rather than the house.

 

Broadband is Openreach.  I haven't spoken with them yet in detail but, talking to others, it seems that fibre and electric can go in the same trench.  Two things to be aware - they still do need to be about 300mm apart and also check that the fibre cable isn't sheathed in anything that is metallic (apparently some are but I can't verify that).

 

 

[saveasteading]

2 minutes ago, Bancroft said:

fibre cable isn't sheathed in anything that is metallic 

I kept the offcut from ours. It is an overhead one. It is a plastic sheath, filled with fibreglass strands enclosing three  hair-like coloured strands of what I assume carry the data.  No metal.

Underground spec may be different.

[garrymartin]

Openreach has a good guide for developers that has all the information you might need https://www.openreach.com/content/dam/openreach/openreach-dam-files/new-dam-(not-in-use-yet)/documents/help-support/New-Sites-Fibre-Handbook-August-2024-online.pdf

[Russell griffiths]

9 hours ago, Alan Ambrose said:

What kind of duct sizes are people using?

Go bigger every time don’t consider anything under 50mm, and 50mm only for a single SWA of say 4-6mm anything bigger will be stiff and awkward to pull through, 50mm rigid for BT or fibre. 
anything bigger stick to 75-90- 100mm ducts.