Basin waste advice

[gshdet]

Hi,

Please can someone check this will be ok to do?

I have a chrome trap on my basin and am using a 32mm compression fitting that goes through the wall and is solvent welded the other side to a 32mm tee with a access plug. The 32mm pipe will then go vertically down roughly 18cm and then go into a 32mm to 40mm reducer and then the 40mm pipe will go vertically down another 18cm and then bend horizontally along the wall through another wall then bend horizontally again with another access plug and then bend into the soil stack. This length is roughly 2 metres and a sink waste will join near the soil stack that is why i have converted to 40mm.

Does this sound ok? I am unsure of the vertical drop and the position of the reducer into 40mm. Is there a better way to do this?

I have added an image trying to show what i am planning.

Thank you for any help.

 

[EPH]

Looks ideal.

 

[Ch4 plumbing]

Just to confirm the trap is chrome and the pipe from the trap through the wall is chrome?
then the elbow from the chrome pipe in the wall is compression yes? I only ask because you can't use solvent weld fittings and solvent weld on chrome pipe.