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Shower waste fall

Discuss Shower waste fall at UK Plumbers Forums; Good evening all , i wonder if any kind pros could give some advice on the pipe fall from my shower tray.i am in the process of fitting 800x1000 offset ...
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    Default Shower waste fall

    Good evening all , i wonder if any kind pros could give some advice on the pipe fall from my shower tray.i am in the process of fitting 800x1000 offset quadrent tray on easy plumb base tray is 40mm profile. The total length of pipe is 3.5 meters i am using 50mm solvent weld pipe,there will be two swept elbow bends in the run the first below the tray the second on the outside of the house.2.4meters of the pipe is inside the bathroom with the remaining 1.1 meters outside, the shower is fitted in a first floor bathroom and the wast is 90mm 24liters min,the first 300mm of pipe from the wast is 40 mm before it canges to 50mm, the shower its self is fed by a condenser boiler via a bar mixer.my only worry so far is that the first 2.4 meters of pipe inside the house will be at a minimum fall of 18mm per meter will this be enough over the distance to prevent the tray getting too full,since the remainder of the pipe is outside this is not an issue as i can get a good fall on this last meter or so. I can raise the tray a little more if i must but am reluctant to do so as it is already a good bit to high for the supplied panel though with a thick beade of silicone top and bottom i can deal with this.advise on if my fall will be ok would be appreciatedmany thanks.
    Ant.

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    Default Re: Shower waste fall

    Sounds good to me, - nearly the depth of the pipe in a couple of metres.
    You state 18mm per metre fall is the minimum, so try to get it slightly more if you can, but whatever you do - make sure the pipe is supported and consistently falling the entire length of fall. If clipping the waste to a joist, screw a clip on every 300mm or close to that IMO
    Last edited by Best; 03-01-2017 at 03:11 AM.

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    Default Re: Shower waste fall

    Thanks best for kindly taking time to reply to my post i will try and get all i can in fall, i guess i must make some sort of compromise between pipe fall and the tray skirt fitting ,as i say the tray is already higher than the skirt and will require some swanky silicone work to fill the gaps so thats kind of why i went with minimum fall from regs of 18per meter, if this is enough then fine but i will have another go at it but may only gain another mil per meter overall.
    Once again thanks

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    Default Re: Shower waste fall

    If the supplied skirting for the tray is to short use a piece of white facia board instead you can then cut it to the Required height without the need for large silicone beads
    If i dont need a hammer i dont want the job

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    Default Re: Shower waste fall

    Yes that may look better than fat beads of silicone so thank you destroyer for the idea, i do know that stuff bends however what would be the best way to fix facia board as i suspect it wouldent be as simple as the original velcro strips since there would be stresses involved as needs to fit the 50cm radius of the quadrant.
    Cheers

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    Default Re: Shower waste fall

    I've used silicone and a couple of screws with the white screw caps before now. The screws hold it in place while the silicone sets, you don't need a lot, then if it needs servicing in future, just cut through silicone and undo screws.
    That fascia board is about £4 for 4m of the 100mm wide one and looks spot on when used in the way you'll be doing it. A bit like a skirting board at the bottom of the original shower panel.
    If bending it I like to leave it pre bent for a day or so before hand so it doesn't spring back so much.

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    Default Re: Shower waste fall

    Thanks for all this good info and also for your reply jc plumb,i have nothing to screw it too so i imagine some timber is fitted before hand is that correct, as this is now looking the way to go since the tray is now 20mm higher than the original skirt and may finish up more if i manage to improve on my 18mm per meter fall.
    Thanks.

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    Default Re: Shower waste fall

    Yes you'll need to secure some wood behind, only needed where you'll be screwing.

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    Default Re: Shower waste fall

    So finished adjusting height of my eastbrook tray tonight, after checking the final fall on the 50mm pipe with a level and packing shims it works out at 20mm of fall per meter of pipe,this is over about 2.5 meters i cant do any better so hope this fall is enough to clear the tray without the floor getting wet.
    Does this sound ok.

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