Waste pipe drop required through wall

[diy_dunce]

Hi,

I'm attempting to install a shower into my downstairs cloakroom. The first fix of pipes has been done by my local plumber, leaving me to deal with the rest.

I'm using a mcalpine shower waste, that has a 135 degree multifit which I then need to create some pipework to take away the water. In order to take the water away, it looks like I need to fit another 135 degree pipe to flatten out the pipe before I take it through the cavity wall and into the gully outside. Is it ok to have a flat run through the wall, or should I try to get some kind of drop through all parts of the pipework?

 

[PrenticeBoyofDerry]

Ideally you want some fall, so water does not settle nor does hair, grease, grime or soapy stuff etc.. Or you could end up with problems

 

[diy_dunce]

Great - thank you - I'll try to get a shallow drop ( I guess in reality I won't be able to drill a dead straight whole through the wall in any case )

 

[rob_j20]

The hose through the wall should be level but you go bigger, for a 40mm waste you drill a 52mm hole.