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Posted: Mon Mar 26, 2018 6:51 pm
by danped
Hi,
I'm putting some slot drainage channel at the edge of my patio before laying the flags. I have a run of about 6 of them before then a p trap and then a length of pipe into some existing drainage. I am a bit concerned that the p trap will be entirely underground and I'll have no access to unblock the drain at any point, it there any issue with this or is there something I should do to allow access?
Thanks,
Dan
Posted: Tue Mar 27, 2018 12:08 pm
by Tony McC
The P-trap sits directly beneath the slot drain, so you could use a compatible slot drain access cover to give you that access to the outlet and, thereby, the surface side of the P-trap.
Then, if you make the pipework from the P-trap conncet to the existing drainage line via an access cover or inspection chamber, you have access *back* to the P-trap from the sewer side.
Does that make sense?
Posted: Tue Mar 27, 2018 11:08 pm
by danped
Thanks, that makes sense, but I dont think there is a slot drain access cover for the Bielbet Slot Drain: http://www.drainageshop.co.uk/category-6110.html
Posted: Wed Mar 28, 2018 9:32 am
by Tony McC
I'm not familiar with that range, but I wouldn't be installing *any* linear system to whiuch I had no access for necessary maintenance. How do they expect you to clear out silt and detritus if there is no access section?
At least when you use 'standard' channel drainage, you can lift off the gratings to get access, but that's simply not practical with slot drainage systems, which is why access sections are absolutely essential.
Posted: Thu Mar 29, 2018 7:15 am
by danped
Ah. Is this a slot drain access cover? link
Posted: Thu Mar 29, 2018 8:24 am
by seanandruby
Why will the p trap be buried? Can't you use a raising piece? Yes that unit is ok for slot drain but i would like to see a bit deeper sump to collect silt etc: you can cut the bottom on those to add more depth. Also you will need an end adaptor to convert to 100/150 pipe.
Posted: Thu Mar 29, 2018 9:00 am
by danped
Thanks so I'll need:
slot drain -> end adapter -> slot drain access cover -> p trap -> access point on the other side -> connection to sw drain
That said, that access point seems oversized to me it is 25cm x 25cm.
Posted: Thu Mar 29, 2018 11:19 am
by seanandruby
Well you could use an aco sump, not as wide but deeper, about 600ml. They take a silt catcher bucket. Your teap at 250, halve it and 125ml either side. You need to be able to get your hand/rod in there that's why it's calked access chamber.
Posted: Thu Mar 29, 2018 12:29 pm
by danped
I think a raising piece would solve my problem but I can't find one with a 110mm inlet. ???
Posted: Thu Mar 29, 2018 3:37 pm
by danped
An in line bottle gulley was the answer rather than a p trap! Although I had seen these I hadn't appreciated they also have an air trap in them. Thanks for the help.