Posted: Wed Oct 15, 2008 4:59 pm
I'm (still!) working on replacing a rainwater soakaway and now need to replace the gully as well.
The pit is dug, I've got the geotextile fabric, and I'm ready to install the few yards of 110mm pipe to the gully that serves the downpipe from the roof. I was originally intending to use the existing clay gully, but it turns out that it was cracked and had been invaded by roots.
This original clay trap is roughly the same shape as it's 110mm plastic equivalent with a square metal grid set into the top. The whole thing was set into a large chunk of concrete. The gully was set against the wall and the other three sides of the square had a six or eight inch concrete upstand that was finished with a smooth mortar or a fine-grain concrete.
None of the modern plastic equivalents seem to have any sort of upstand built into them. The fittings I've found all seem to present the grid at ground level with nothing to surround it like this and this.
I need to have the downpipe from the roof terminate above the gully grid because, historically, a lot of leaves and crap off the roof gets stopped by the grid. If I cut a hole in the grid and feed the downpipe through it, all that rubbish is more likely to get all the way into the soakaway.
Is there a separate hopper fitting that I need, or am I supposed to build an upstand around the gully grid using bricks, blocks or concrete?
Thanks,
Mike
The pit is dug, I've got the geotextile fabric, and I'm ready to install the few yards of 110mm pipe to the gully that serves the downpipe from the roof. I was originally intending to use the existing clay gully, but it turns out that it was cracked and had been invaded by roots.
This original clay trap is roughly the same shape as it's 110mm plastic equivalent with a square metal grid set into the top. The whole thing was set into a large chunk of concrete. The gully was set against the wall and the other three sides of the square had a six or eight inch concrete upstand that was finished with a smooth mortar or a fine-grain concrete.
None of the modern plastic equivalents seem to have any sort of upstand built into them. The fittings I've found all seem to present the grid at ground level with nothing to surround it like this and this.
I need to have the downpipe from the roof terminate above the gully grid because, historically, a lot of leaves and crap off the roof gets stopped by the grid. If I cut a hole in the grid and feed the downpipe through it, all that rubbish is more likely to get all the way into the soakaway.
Is there a separate hopper fitting that I need, or am I supposed to build an upstand around the gully grid using bricks, blocks or concrete?
Thanks,
Mike