Gas Pipe under the floor

evilgoose

Hello,
I'm doing work on my house and I'm thinking that in the future I'd like to put a gas fire in my front room. the gas meter is (currently) under the stairs in the hall.

I'm having to redo the hall floor and it's likely that I'd have to redo the floor in the front room at some point. (its a solid floor, which the top screed of about 15mm is cracked in places an sounding hollow). As I've got to do the floor I wondered about laying a conduit in a channel and then covering with the repaired floor. I thought a gas pipe could then be passed through this to install gas in the future.

Is this feasible? allowed?
If so, how deep would it need to be? (from top of pipe to the floor surface)
I've seen vented channel mentioned but not sure what this means?

thanks,

Pssst

Ventilation may need to be required for a purpose made duct. I dont believe that what you are proposing would constitute a duct.

It is perfectly acceptable to lay some kind of recess to accept a pipe. This might be preformed plastic channel or a wooden channel. Depth-in this circumstance the minimum depth would be sufficient to accommodate the pipe and allow for the duct/channel material to sit flush to the floor surface

bryanb

Why not lay in the gas pipe? It will probably be very difficult to push a pipe through in one piece later. Check the measurements and the space available to get the pipe in..

evilgoose

I'm affraid funds are tight, so the front room is been put on the back burner. I was going to lay the conduit (I was thinking about using 32mm drain pipe?) under the hall floor now to save lifting it again in the future. (I need to get the floor done asap for other work)
Then once the front room is started link into this conduit to continue through to the fireplace.

I had wondered about pushing through the pipe afterwards, but was thinking that the 32mm would accomodate the pipe and some flexibility for installation? (15mm gas pipe + yellow pvc coating)

bryanb

My point was, Can you get the length of the gas pipe (straight) in the room / Hall to push it in?

evilgoose

Agreed I think it'll be tight. I've seen copper pipes which are 'coiled' can more flexible, rather than a long straight length, can these be used with gas fires?

From what I've read, they recommend as few joins as possible and then only soldered ones?
Had wondered it the pipe could be pushed through then the next piece soldered on and pushed through.
the hall is about 1m wide, the under stair space 1m wide and the front room is 4m wide.

bryanb

evilgoose wrote: »

Agreed I think it'll be tight. I've seen copper pipes which are 'coiled' can more flexible, rather than a long straight length, can these be used with gas fires?

From what I've read, they recommend as few joins as possible and then only soldered ones?
Has wondered it the pipe could be pushed through then the next piece soldered on and pushed through.
the hall is about 1m wide, the under floor space 1m wide and the front room is 4m wide.

Coiled copper pipe (10mm) was used by the corgi who installed my gas stove last year. Only for the last bit through the side wall of the fireplace and under the marble slab.

adaze

Not sure if this would be allowed, but could you not put a single 22mm gas pipe through the conduit, leaving it exposed at each end so the plumber can connect up when you get the work done?

Pssst

Canht you just create a boxed channel laid in the floor,lay your floor,leaving the channel open and then fit the pipe in the channel and board the top of the channel? This would provide a useful duct for other uses,eg cabelling etc?