Aco drain outlet to ceramic drain

[efunc]

Hello all,

total novice here with a new Aco installation that I'm trying to connect up, but have hit a snag. It's hard to explain so I'll let some pictures do the talking. The Aco runs in front of my garage doors and the main input to it is the downpipe from the gutter. Here's a pic before the Aco was installed:

Now, this is a picture of the other side of the doors where I've broken the concrete floor a little to allow a 110mm elbow to flow down to the drain in the floor:

So, what you can hopefully see is that there's an old ceramic drain here I was hoping to connect to. However there is an obstruction in the way. It appears to be the top of some sort of trap that rises above, about level with the neck of the drain, and it's part of the same component. As you can see, I've accidentally broken through the top of the trap when clearing away the concrete channel above.

The main issue is that if try to extend the outlet pipe with a 40cm extension section to direct it into the neck of the ceramic drain, then the pipe is forced up about 30 degrees because of the trap. What are my solutions? I can't place the Aco higher, because it's at ground level outside, and I can't do anything much with the ceramic drain. The 3 solutions I can think of:

1 - Cut the top off the ceramic trap, patch it with a resin/mesh/mortar/SBR(?), overlay it with the extension pipe at correct gradient into the drain.

2 - Break a bit more of the concrete floor around trhe gully and create a more effective concrete channel directing water from the plastic outlet, around/over the obstruction down into the drain. The cement needs some additive to make it more waterproof I guess. I then need some kind of grill or cover over it.

3 - Break a bit more of the concrete floor, fit a 68mm reducer on the 110mm outlet and then lay some of this smaller piping to flow around the obstruction, into the drain. Make good the broken neck of the drain and then concrete over the whole thing.

Are there any other products or solutions out there to make this job quick and easy? I want to be the least destructive as possible, but I do want to get rainwater from the Aco to this drain with as little disappearing into the floor of the garage/patio as possible. Any advice welcome as I'm completely new to most of this.

Thanks!

 

[efunc]

Anyone have any thoughts on the simplest solution to this so that I can try to attack it at the weekend? Thanks all!

 

[Hugh Jaleak]

Looks like you've opened a can of worms there, I'd bet that gulley is connected to the house drainage system, so will need to be keep sealed or you'll have the garage stinking of drains. Could do with perhaps another pic from further back showing the existing gulley arrangement and where the Aco drains runs in relation. Gulley will look something like this, you've broken into the outlet section, so the trap sealing it off from the sewer is now compromised.



Personally, would dig back, and expose the drain running away from the gulley, and look to see if I could connect there somehow, if need be, fitting a vertical outlet on the Aco drain, into a 'tick trap' and then connecting that to the existing drainage.

 

[efunc]

Blimey! Thanks for your input. If that's correct I can't really afford to get into anything too big. Presumably I can repair the hole in the trap somehow. I'll take some better pictures tomorrow and put everything else one hold until I understand what's going on

 

[efunc]

I'm wondering if a repair in-situ could be done because the entire patio and the garage floor is concreted making any excavation very difficult. The area of damage is the top of the trap, about the size of a 10p piece, and also the neck of the ceramic pipe we were hoping to connect the aco outlet to. My builder just wants to pour concrete around the pipe from the Aco and claims this will plug the hole in the trap.

Here's a quick video:

Apologies for the upside-down picture!

Aco running in front of garage doors:

Inside of garage floor:

Grating removed, looking down drain towards the aco outlet pipe:

Looking at ceramic drain from the direction of the aco outlet:

 

[Ian H]

You aco and drain are running in opposite directions.

I would take the gully out, CCTV down and find a suitable place to add a junction for a new aco connection.

Most would bodge it onto the top of the trap, it would work but if the drain has foul connected too you will likely get some smells venting from the aco.

Maybe seal the hole and form a concrete channel above it and into the gully.

 

[efunc]

Thanks Ian. This is a bit 'heath robinson' even by my own standards, but I ended up fitting a 110mm to 68mm reducer onto the Aco pipe, cut a length of downpipe and fitted it so it ran over the top of the gully and into the drain. I then filled the void with about 100mm of concrete to fix it all in place and seal the breach in the trap. I used fibreglass roofing trim to shutter around the neck of the ceramic drain to ensure it was fully cemented in a flush.

This is the reducer I had to fit:

The 68mm pipe offset from the centre and the adapter was rotated so the 68mm pipe connects at the top of the 110mm diameter. This is the crux of the problem. It does clear the ceramic trap and also pich down at a suitable angle to flow toward the drain, but there will always be about 30mm of trapped water languishing below the exit to the 68mm pipe. I guess this will evaporate eventually through the Aco grill on a dry day, but still, it's a bit of a bodge for me.

Looking down the channel drain outlet: