Will This Pipework Work OK?

[thomp1983]

Hi all,

I've been fitting the new 110mm pipework for our upstairs bathroom.

Our new toilet is going where the hatched orange bit is and it's outlet will follow the blue line into the 110mm pipework. It then goes through a 110mm 92.5 bend into a small section of 110mm pipe into another 92.5 bend drops approx 200mm then into another 92.5 bend that follows the pink line across my garage ceiling as seen in the second image where it then joins the svp outside. The white 50mm pipe coming in is the handbasin.

I'm not really happy with the 3 92.5 bends being so close to each other but I can't see many other options?

The falls good the only other change I could make I think is to use a couple of 135 degree bends and go to the left of the roof truss and see if it introduces a smoother run. My other thought is to get a long underground rest bend and use that from the 92.5 bend above the strap boss as it will give a gentler curve round the truss before joining the toilet but it will still effectively be 3 turns with a metre or so of each other.

Anyone have any thoughts or am I overthinking it (all the bends and pipework will be supported with brackets once I've settled on the layout.)

Thanks
Chris

 

[denso13]

Bends are fine, will it be vented? Do you have LABC involvement, they will have the final say and sign off.

 

[thomp1983]

Svp is vented out side as below, bco has signed it off, they were only interested in the venting and how it's joined the existing drain.

 

[denso13]

Looks quite long inside only to be vented externally. See how it goes...

 

[thomp1983]

Would it be beneficial to have a short stack to the left of the toilet with an aav on then?

 

[Hugh Jaleak]

Would it be beneficial to have a short stack to the left of the toilet with an aav on then?

Yes.. Air behind water, it's got a long way to go! AAV needs to be above spillover level of the Basin.

 

[thomp1983]

Had a measure up earlier, aav would end up about 400mm higher than the basin so should be plenty.

 

[thomp1983]

Incase anyone's interested this is how it turned out in the end,

The AAV has ended up about 2ft above the basin so shouldn't be any issues there.

There's a decent fall to where it drops down into the garage so I don't forsee any issues and all the pipework is clipped in place so nothing should move.

I know the terracotta fittings are supposed to be for below ground but it's what I could get at the time and they'll be fully in the dark once the decor is finished.

Chris

 

[Madrab]

The UG pipe just isn't UV stable, that's all, if it's indoors then it won't be an issue