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waste pipe

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

    Cast iron bath/basin waste pipe fitting size?

    Hi, Helping a friend, his soil stack is cast iron. The bath and basin wastes (all removed now) went into individual entries on the stack. These are iron pipes, with what looks like a female internal thread into which there is some sort of metal reducer with what is maybe a compression fitting...
  2. K

    Multi-fit connection for 38mm chrome waste pipe?

    Hi all, I'm in the process of fitting my freestanding bath. The supplied waste chrome pipe that runs into the floor is an unusual diameter - 38mm (European?). The bath came with a PVC multi-fit coupler to connect this chrome pipe to standard plastic waste pipe but its to long once I get under...
  3. K

    Waste pipe connection for freestanding bath

    Hi all, I'm currently in the middle of first fixing the waste pipe for my freestanding bath. I've created a mock version out of plastic to determine where the waste enters down through the floor - see photo. I was just wondering is there any minimum length the pipe has to run after the trap...
  4. J

    running toilet waste pipe inside stud wall.

    Renovating an upstairs bathroom. Void between floor boards and ceiling below is too narrow to hide the waste pipe from a wall hanging toilet. My plan is to build stud wall with sufficient width to hide the 100mm toilet waste pipe into the existing stack. In practice this means extending the...
  5. P

    Washing machine Waste Pipe Attached To Machine

    I'm looking to install my new washing machine. The waste pipe was clipped round the back of the machine during transit. It popped out of some of the clips with ease, but one clip seems sealed. I need the extra length, so ideally need to unclip it from the clip shown in the photos below. Is...
  6. J

    Neighbour's Waste Pipe

    Hi Looking to 'crowd-source' some public opinion on this one. I bought a studio apartment on 30th September 2022 and I'm currently working with contractors to refurbish it. I'm 39 and it is my only property (I'm no property tycoon). Next door's bathroom is on the other side of the wall to my...
  7. S

    I don’t know what to tell my landlord about the toilet?

    Hello everyone. I am solo tenant living in a flat. The bathroom is a horror show. Black mould on tiles. Water has previously come in from the flat above, requiring the ceiling to be replastrered. The fixtures and fittings are very old. But I have made do. The toilet is starting to worry...
  8. S

    Sink waste pipe unable to get water tight

    Hi, Noticed a leak in my sink and the pipe collapsed down for the P trap. So I was going to replace it all. However, i've been stuck because this starting part from the sink isn't forming a good water tight seal. The rest of the pipes kind of insert into each other nicel and have a grove in the...
  9. O

    Long Sink/dishwasher waste pipe

    Morning all, A diy'er here. I'm installing a new kitchen in a room on the opposite side of the house and need run the sink and dishwasher waste under the floor to the opposite side and go out where the existing kitchen is, around 9m. The driveway and garage are outside the wall in the new...
  10. I

    1"½ waste pipe going uphill?

    I need to connect a 1"½ kitchen waste pipe to a drain but it will have to go at a slight uphill. I have never had to deal with this before and I like advice on what best to use and model. I am aware that a macerator pump can be used? any help welcome t. T
  11. J

    Toilet waste pipe under floor

    Hi guys after a bit of advice .... An old close coupled pan will be replaced with a new close coupled pan. With the waste line been quite far from the wall, the old one was attached to the waste using a really long flexi pan connector , bent at an awkward angle backwards then up through the...
  12. B

    Bath waste pipe install?

    I’ve removed a shower tray & have installed a bath. I’ve got the trap ready to go on but how do I go about connecting pipework up to this? Obviously I will unscrew that old shower waste off.
  13. 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...
    • dave100
    • Thread
    • advice concrete concrete floor floor flow rate pipe replacing shower shower waste solvent solvent weld waste waste pipe waste pipe joints waste trap weld
    • Replies: 11
    • Forum: UK Plumbing Forum | Plumbing Advice
  14. B

    Neighbour's Waste Pipe Runs Under my Backyard

    Sorry this is a bit long but I need to explain the scenario. My neighbour's soil pipe runs underneath the backyard of my house (where my son, his wife and his 6 year-old daughter now live). It then joins our soil pipe and goes on to the main sewer. They are both 3-storey 5-bedroomed terraced...
  15. V

    How to open up toilet waste pipe please

    How to open this toilet pipe please? I need to retrieve a key I dropped down here. I think its sitting in the grooves of the flexible pipe. Will this pipe unscrew easily, I can probably untwist it OK. But then after is it easy to reconnect and ensure its water tight? Any advice gratefully...
  16. D

    Waste pipe connection from basin

    I have a bathroom basin that had a flexible waste pipe leading from the sink into a fixed waste water pipe. The Flexi-pipe had perished away and I can not find a replacement to fix onto the basin to the waste pipe. I have tried numerous flex pipes but none fit onto both.
Im probably being stupid...
  17. G

    Waste pipe too high to fit toilet unit.

    I am in the process of replacing my wc and sink from close coupled/ free standing with built in sink and wc . The old toilet waste fed into an internal stack pipe - out the back of the wc thro 90 degree coupler into a large waste pipe approx 30"which connected to stack pipe running in a box in...
  18. A

    NIBE f205 waste water constantly flowing down the waste pipe

    Out Heating system is losing water constantly. I believe it's overflowing from somewhere and is flowing into the waste water funnel and from there straight into the waste pipe. Apart from receiving a very large water bill it's preventing the system from reaching the 50 degrees idol temperature...
  19. N

    Kitchen waste pipe replacement costs

    Hi, a plumber has been out to my rental property as my tenant reported a blockage causing water to flow back from the washing machine into the dish washer. Both were disconnected and their drainage hoses cleared out but the plumber advises that there is more of a blockage further down the waste...
    • Nadine
    • Thread
    • america costs kitchen pipe replacement usa waste waste pipe
    • Replies: 3
    • Forum: USA
  20. P

    Leaking sink waste pipe replacement?

    Hi, the waste pipe under the sink is leaking at the push fit connection. Is there an easy way to seal, or should I replace with a compression fitting? Leak in yellow circle in grey pipe. Thanks
    • Pedro888
    • Thread
    • america leaking pipe replacement sink usa waste waste pipe
    • Replies: 1
    • Forum: USA
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