Driveway foul and rain water trap

Secret_Sipper · 2 Jul 2019

I'd appreciate some advise from someone that knows far more with modern ways of doing this.

I will be getting my driveway block paved in a few weeks time and would like to renew the existing plastic waste pipe from the downstairs toilet sink that currently is as the photo. It's been painted so many times, I'm not sure it knows what colour it used to be!

I understand I'll probably still need the trap to stop vermin getting up the waste pipe but does this need to be accessable via a grill or can this have a inspection cover?

If anyone could point me in the right direction to what I need to do before the drives done, I'd be very grateful.

Hugh Jaleak · 3 Jul 2019

Couple of options, you dont have to have an external trap, provided the internal trap under the basin is of the required seal depth, (76mm). One is, get rid of the gulley, run the drain up to the house wall, fit a bend and then a waste adaptor, and connect the waste directly to the drain. Or alternatively, replace the gulley with a 'Bottle Gulley', connect waste via side boss or back inlet, then remove the grid and replace with a sealed lid.

I would also be inclined to look at rejigging the rainwater gulley arrangement at the same time, depending on the flow from the downpipe in times of rainfall. You will need to retain a gulley to accept the flow from the Aco drain, but I'd be inclined to look at connecting the downpipe via a back inlet, and remove any possibility of splashing up the house wall and subsequent damage to the brickwork.

Hugh Jaleak · 3 Jul 2019

Duplicate post.

Secret_Sipper · 3 Jul 2019

Thanks for taking the time to post up.

The downstairs toilet is really small with a small sink, so it has a small pedestal trap fitted, I'm assuming I would have to keep the outside trap.
I'd be fine with keeping it however I find due to the grille being exposed that I need to get my hand down there twice a year to ensure its clear or sediment/mud/leaves etc gets in there. Could i put a cover/lid over it to stop/lessen this?

I've literally only renewed the downpipe 2 months ago having to tee into it for the porch guttering which was already there but with a flat roof, not a pitched like it is. It doesnt tend to splash up but now I know from your advice I'll give it some thought into changing it.

Thanks again.

Hugh Jaleak · 3 Jul 2019

If you want to keep the existing gulley, you can fabricate a suitable lid/cover yourself, or if you prefer, change for a new plastic type once the old driveway is removed, Osma do a do a screwed down lid for their Bottle Gulley, although Osma products aren't cheap....

To be honest, if sediment and leaves are your only issue, I'd leave the drains as is, make yourself a cover out of a bit of steel plate or something and spend £42 on a Wickes wet & dry vacuum, then just hoover the gulley out as required. https://www.wickes.co.uk/Wickes-Wet+Dry-Vacuum-with-Blower-20L---1250W/p/215735

As an aside, painting exterior plastic pipes with gloss paint is the best thing you can do to prolong the life of the pipework. The paint offers protection against the UV in sunlight, which degrades the plastic over time and makes it go brittle.

dilalio · 4 Jul 2019

Also, can't tell from details given, but have you considered the dpc of your exterior walls with the finished ground level of your proposed new driveway? Your bricks look very porous and can't see any dpc visible or engineering bricks to dpc level! The aco drain looks to have been provided to protect the door from water ingress but this is just as important for your walls!

Secret_Sipper · 4 Jul 2019

The DPC is there above the 2nd brick but the current drive/concrete affair the previous owner had conjured up raised it a brick higher at the front door.
This was picked up on the survey and I've asked if aco or similar drains can be put along the front of the house as its lower than the top of the drive and currently pools abit under the front window.

Ian H · 4 Jul 2019

What about a plastic gully closer to the wall?

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Driveway foul and rain water trap

Similar threads