Fiting a shower waste without a trap

[f49h]

Hi All
I am creating an ensuite bathroom abd have to fit a macerator(i know i Know) the instructions require the shower waste be fitted without a trap (i assume it is for the flow rate of rh waste water) Any ideas on where to find this. I have been lookong at Mcalpine fast flow traps, would this be sufficent.

Thanks in advance

 

[Aquarius]

Which Make/model macerator?

 

[f49h]

Which Make/model macerator?

Stuart Turner wasteflow WC3