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waste trap

In modern plumbing, a drain-waste-vent (or DWV) is part of a system that allows air to enter a plumbing system to maintain proper air pressure to enable the removal of sewage and greywater from a dwelling. Waste is produced at fixtures such as toilets, sinks, and showers. As the water runs down, proper venting is required to avoid a vacuum from being created. As the water runs down air must be allowed into the waste pipe either through a roof vent, or the "drain waste vent" (DWV).

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  1. P

    Gasket/O-ring kitchen sink waste trap

    My parents have a leak from kitchen sink. My dad removed waste trap and since refitted it leaks, but there wasn’t any kind of seal on it, I got a rubber/plastic gasket that seems To fit the trap but with it, I can’t get it to screw and lock back on (has lugs so locks after quarter turn. But...
  2. E

    Anyone know what kind of shower trap/flange this is?

  3. dave100

    Advice on replacing solvent weld shower waste pipe into concrete floor

    Hello there! I hope your weekend has started well. TL/DR: Should I replace 90-degree bend with a smaller type to increase the fall from the shower tray? I am replacing a bathtub with a 1500 X 800 Sonas shower tray which I will place on 4-inch blocks, probably with some 18mm marine ply on top...
  4. J

    Shower trap query, drains smell

    Hi, I have recently bought a house where there is a constant drains smell in the downstairs wet room. I suspect that the trap is not sealing but I can't find how to seal this particular trap. I wonder if there is something missing that would seal it. The trap and drains are clear. Any help would...
  5. S

    Shower tray orientation

    To make fitting of the trap pipework simpler, I’m considering turning the rectangular tray around such that the trap would be positioned behind the user i.e. the water would flow away from the shower. Is there any reason why I can’t do this / it’s unadvisable?
  6. S

    Hi-Flow Shower Trap Pipework Check

    I’m currently considering how best to do the pipework from the shower trap (90mm, 1.5”) and I just wanted some input from you guys and which is the best option, as shown in the attached photos? Never done this kind of thing before and I am a little bit concerned that my pipework may not be able...
  7. D

    Fitting Mcalpine waste trap

    Am replacing a rubbishy old waste trap and have bought the McAlpine 1.5-2 sink kit with 40mm pipes. Problem is that the end which connects to the outside pipe is neither in line with it nor close to it (several cm away). What can I use to connect it - I was looking at the McAlpine FLEXCON4...
  8. S

    URGENT Is this right? - Washing machine

    Hi all, I’m having a problem with my washing machine and any help would greatly be appreciated! I moved into my new build ground floor flat just over a year ago and I’ve always had a problem with my washing machine not working correctly and leaving my clothes with a damp/stagnant water smell...
  9. T

    Help locating a rectangular waste trap for kitchen sink?

    Hi all, I am hoping someone can advise on this.....bought a 1.5 bowl sink a while ago from B&Q but never got around to fitting it. Now decided to fit it in my utility room but upon having a look at it the smaller of the two bowls appears to have a rectangular slotted waste exit in the bottom as...
  10. N

    Smelly Washing Waste Trap when Toilet Flushed

    Good morning I have a washing machine now installed in the cellar and the waste pipe is connected to a pipe that is connected to the main waste pipe that goes down to the sewer but now when the toilet upstairs is flushed a rotten egg smell is coming for the washing machine trap ...
  11. A

    Sink waste trap gurgling/noise

    Hi there, I’m hoping someone can help me with my plumbing issue. I have had a new kitchen installed and as part of that a new Vellamo double sink. My fitter has connected a new waste trap to the sinks however when I run the water from the tap I can hear gurgling noise from the strainer and...
  12. M

    Shower waste trap help

    Hi all, Am a sparks and a member on what i think is the partner site to this (Electriciansforum?) No too clued up on plumbing, first post and of course its a problem! For whatever reason, the threaded bush part of my shower trap has cracked. There is no access from below, and to get full...
  13. D

    Washing machine, dishwasher and single waste trap spiggot

    Hi, I've recently moved into a house with this waste trap (pictured) with twin spigots. As you can see the spigot on the left is already in use with the boiler of all things (?) so I'd rather not mess with that. The washing machine is now installed (after I took this picture) and uses the...
  14. M

    Shower tray waste trap

    Hi - Have joined the forum to ask the experts if they can identify this shower tray trap? I want to replace it but can't find it on the web Can you point me in the right direction please with an idea of the make and model? Thank you!
  15. J

    IKEA waste trap only one spigot/nipple?

    Hi folks, I'm fitting an IKEA kitchen and currently on with the sink. The trap they've provided, which seems to be required as the waste strain screws into the waste below, only has one spigot/option for a white good. There doesn't seem to be any other way to tap into this trap to allow for two...
  16. G

    help appreciated on best design option for kitchen sink/appliance waste trap

    Hi all I'm building a new kitchen and I'm at the stage of planning out changes to the waste connections for a new sink. I'd appreciate some advice on best practice for the sink trap connections to the current 40mm waste supply. The new sink is deeper than the old one, but I reckon a p trap...
  17. W

    kitchen waste trap

    Hi I have attached a pic above as a friend of mine her waste is leaking. As I am only learning the trade I was thinking if I put a 1 and half bowl waste p shape trap in this should solve the problem. I know I may have to re drill out for the waste outlet as it's fairly high up in the cupboard...
  18. P

    Shower waste trap

    I have a shower cabin and the waste trap has cracked and some bits have broken off hence it has started leaking. I tried to find a replacement but it seems to be a non standard size. The hole in the shower tray is 80mm - where the hell can you buy a replacement trap from of that size? Its...
  19. A

    Waste Fitting Waste trap question

    Can anyone explain how to add a waste trap to this sink please. The sink is stone and the only access is from below (shown). There is no plug. Thanks
  20. R

    shallow shower waste trap with HepVo valve?

    we are thinking of connecting the bath, shower and basin waste to underground drain that is connected to the pan waste. all are 40mm solvent weld pipes and concealed in walls and underground. we have been told to get a shallow top access waste for shower as we will NOT be using a riser kit for...
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