Waste trap or s bend for horizontal discharge?

[bobsyeruncle]

I'm having one of those days where you stare at something for ages but to no avail.

I have one of those 'all in one' shower units that you get off eBay and we had it installed before with no 's bend' or trap as it discharged into an open drain. Still not ideal I know but it was temporary.

Anyway, I'm installing it in the new bathroom an it's going to discharge into the soil stack so I need some form of trap.
The actual discharge from the tray has no trap, just discharges into a horizontal pipe which also has the overflow and discharge from the 'steam unit' with an open compression end for attaching waste pipe

How on earth do I put a trap or p bend in this in such a tight space?

 

[Newboy]

might be worth trying a waterless trap

http://www.plastics-express.co.uk/w...&network=pla&gclid=CPn-lZ_DmcQCFfQatAodRBsACw

Welcome to the world of modern bathroom design!

 

[polesapart]

or this:

http://www.mcalpineplumbing.com/1-188-running-tubular-swivel-p-trap.html