P trap on rain down pipes

[Alexphd1]

Just preparing for laying the patio and have came across that there's no P-trap or any trap in any of the rain down pipes. The down pipes right into the grid/hopper then into a elbow then away on a horizontal run (slight run). I always thought we needed a p-trap or bottle.

[Temp]

I don't think we have any either. Our 80mm metal down pipes go via a rubber adaptor into 110mm pipe and a bend. We have a lot of trees that shed leaves into the guttering but and they haven't caused any issues.

 

You can get things like this..

 

https://www.screwfix.com/p/floplast-d94-debris-gully/25121?tc=BT2&ds_kid=92700020953276340&ds_rl=1241687&ds_rl=1245250&ds_rl=1249404&ds_rl=1249799&ds_rl=1245250&ds_rl=1249481&gclid=Cj0KCQjw4s7qBRCzARIsAImcAxaVytNqcb5qpVfHvF3QwruB7T-FnMA0fGLkM3Dqpf-rO7xqhaoy6vUaAguUEALw_wcB&gclsrc=aw.ds

 

Edit: I don't think they have a trap, they are just sealed to stop debris on the ground getting in.

Edited May 7, 2024 by Temp

[Temp]

Are you worried about smells? Are you on soakaway or combined sewer?

Edited May 7, 2024 by Temp

[Alexphd1]

It's into a private soakaway so smells shouldn't be a problem 

[kandgmitchell]

No requirement for a trap if just to a soakaway.