grey waste water pipe

Discussion in 'Motorhome Chat' started by ShiftZZ, Sep 21, 2016.

  1. ShiftZZ

    ShiftZZ Funster Life Member

    Joined:
    Feb 19, 2008
    Messages:
    19,821
    Likes Received:
    35,886
    Location:
    Leicestershire
    What is the standard size?
     
  2. DavidG58

    DavidG58 Funster

    Joined:
    Feb 24, 2013
    Messages:
    6,282
    Likes Received:
    12,117
    Location:
    Bolsover, Derbyshire
    I bet there is a formula for it somewhere

    length x bends / ambient temperature (y)

    but then factor in

    the UK makers optimism (far too narrow)

    European makers realism (nearly big enough)

    The US over spec (massive)

    o_O I don't there is a standard size, other than mostly 'too narrow' :)
     
    • Like Like x 1
  3. laneside

    laneside Funster

    Joined:
    Aug 14, 2009
    Messages:
    3,490
    Likes Received:
    5,289
    Location:
    Oradour sur Vayres
    Dave if you have my sort of luck, about 1cm. bigger or smaller than the first bit you buy.
     
    • Like Like x 1
    • Funny Funny x 1
  4. Geo

    Geo Trader - Funster

    Joined:
    Jul 29, 2007
    Messages:
    9,527
    Likes Received:
    5,581
    Location:
    Mansfield,Notts
    Normal convoluted waste pipe is available in two sizes 23.5mm (standard ) internal dia and 28.5 internal dia (Newer Caravans)
    also a smooth internal surface available at 20mm internal dia
    Gray solid pipe and push fitting etc are sold as 28mm
    So to answer your question fully
    20-23.5 -28-28.5 are all standard waste pipe sizes in Caravans and Motor Homes
    Geo
     
    • Informative Informative x 2
    • Like Like x 1
  5. GJH

    GJH Funster Life Member

    Joined:
    Aug 20, 2007
    Messages:
    27,237
    Likes Received:
    34,449
    Location:
    Acklam, Teesside, originally Glossop
    Depends on the make and whether it is rigid/convoluted.

    Can you measure the end of the existing pipe?
     
  6. DuxDeluxe

    DuxDeluxe Funster Life Member

    Joined:
    Jul 10, 2008
    Messages:
    9,360
    Likes Received:
    25,076
    Location:
    Planet Zog
    It will be of the highest quality, whatever the size, considering it is affixed to a Rapido.
     
    • Like Like x 1
  7. icantremember

    icantremember Funster

    Joined:
    Sep 2, 2010
    Messages:
    5,059
    Likes Received:
    7,107
    Location:
    Nr Watton in Norfolk
    Ours is 40mm so there!:tounge:
     
    • Like Like x 1
  8. DuxDeluxe

    DuxDeluxe Funster Life Member

    Joined:
    Jul 10, 2008
    Messages:
    9,360
    Likes Received:
    25,076
    Location:
    Planet Zog
    Typical Posh Hymer owner....... :p and I bet your grey waste dumping is electrically controlled for when there is a Burstner behind you.......;)


    Mine's rigid but only 28.5 mm
     
    • Funny Funny x 2
    • Like Like x 1
    • Useful Useful x 1
  9. icantremember

    icantremember Funster

    Joined:
    Sep 2, 2010
    Messages:
    5,059
    Likes Received:
    7,107
    Location:
    Nr Watton in Norfolk
    Of course ... and particularly Pilotes.:wink:
     
    • Funny Funny x 2
  10. Bailey58

    Bailey58 Funster Life Member

    Joined:
    Jun 23, 2010
    Messages:
    6,363
    Likes Received:
    9,638
    Location:
    Norfolk and Toftir.
    I'm surprised nobody's come up with this old spec yet.


    1. All pipe is to be made of a long hole surrounded by metal or plastic centred around the hole.

    2. All pipe is to be hollow throughout the entire length - do not use holes of different length to the pipe.

    3. The ID (Inside Diameter) of all pipe must not exceed the OD (Outside Diameter) - otherwise the hole will be on the outside.

    4. All pipe is to be supplied with nothing in the hole, so that water, steam or other stuff can be put inside at a later date.

    5. All pipe should be supplied without rust; this can be more readily applied at the job site.
    NOTE: Some vendors are now able to supply pre-rusted pipes. If available in your area, this product is recommended, as it will save a great deal of time at the job site.

    6. All pipe over 500ft (150m) in length should have the words "LONG PIPE" clearly painted on each side and end, so that the contractor knows it's a long pipe.

    7. Pipe over 2 miles (3.2km) in length must also have the words "LONG PIPE" painted in the middle, so the contractor will not have to walk the entire length of the pipe to determine whether or not it is a long pipe or a short pipe.

    8. All pipe over 6ft (1.83m) in diameter must have the words "LARGE PIPE" painted on it, so the contractor will not mistake it for small pipe.

    9. Flanges must be used on all pipe. Flanges must have holes for bolts, quite separate from the big hole in the middle.

    10. When ordering 90 or 30 degree elbows, be sure to specify left-hand or right-hand, otherwise you will end up going the wrong way.

    11. Be sure to specify to your vendor whether you want level, uphill or downhill pipe. If you use downhill pipes for going uphill, the water will flow the wrong way.

    12. All couplings should have either right-hand or left-hand threads, but do not mix the threads otherwise, as the coupling is being screwed on one pipe, it is being unscrewed fron the other.

    13. All pipes shorter than 1/8in (3mm) are very uneconomical in use, requiring many joints. They are generally known as washers.

    14. Joints in pipes for piping water must be water-tight. Those in pipes for compressed air, however, need only be air-tight.

    15. Lengths of pipes may be welded or soldered together. This method is not recommended for concrete or earthenware pipes.

    16. Other commodities are often confused with pipes. These include: conduit, tube, tunnel and drain. Use only genuine pipes.

    17. Scottish Regiments in the Army use Army pipes in unusual ways. These are not approved of in engineering circles.
     
    • Funny Funny x 12
    • Like Like x 1
  11. GJH

    GJH Funster Life Member

    Joined:
    Aug 20, 2007
    Messages:
    27,237
    Likes Received:
    34,449
    Location:
    Acklam, Teesside, originally Glossop
    Only if it has been pinched from a Burstner :D
    So is ours, on our highest quality Burstner :D
     
    • Like Like x 1
  12. Ninovan

    Ninovan Funster

    Joined:
    Oct 27, 2013
    Messages:
    271
    Likes Received:
    165
    Location:
    Salisbury, Wiltshire
    So is ours! :D
     
    • Like Like x 1
  13. Lenny HB

    Lenny HB Funster

    Joined:
    Oct 18, 2007
    Messages:
    5,246
    Likes Received:
    5,043
    Location:
    West Sussex
    Another Hymer owner with a BIG 40mm one, and the new van we will probable buy has the electric dump valve operated from the drivers seat.:D

    Those poor Carthago owners like @Robert Clark only have little 32mm ones.:)
     
    • Funny Funny x 3
  14. Reallyretired

    Reallyretired Funster

    Joined:
    Apr 27, 2008
    Messages:
    5,706
    Likes Received:
    3,211
    Location:
    Eastbourne East Sussex
    I think mine is 40mm on my RAPIDO. There is a size of convoluted tubing that fits cause I've got some, came from Chichester caravans but no doubt elsewhere too.
     
  15. DuxDeluxe

    DuxDeluxe Funster Life Member

    Joined:
    Jul 10, 2008
    Messages:
    9,360
    Likes Received:
    25,076
    Location:
    Planet Zog
    I measure ours. The end is about three feet from the tank. Is that any help?
     
    • Like Like x 2
    • Funny Funny x 1
  16. PeteH

    PeteH Funster

    Joined:
    Nov 22, 2007
    Messages:
    1,761
    Likes Received:
    2,176
    Location:
    East Yorkshire
    40mm (or 1.57403149606299 Inches in old money)
     
    • Like Like x 1
  17. Johns_Cross_Motorhomes

    Johns_Cross_Motorhomes Trader - Motorhome & Accessory Sales

    Joined:
    Jan 5, 2008
    Messages:
    9,247
    Likes Received:
    5,198
    Location:
    East Sussex 01-580-881288
    • Funny Funny x 1
  18. RowleyBirkinQC

    RowleyBirkinQC Funster

    Joined:
    Sep 20, 2014
    Messages:
    626
    Likes Received:
    1,278
    Location:
    Dazed & Confused
    No clue, it's bendy and came from AT website. When appropriate, it has fitted all punctured plastic bags stuffed with grass thus far...
     
  19. Robert Clark

    Robert Clark Funster Life Member

    Joined:
    Jul 12, 2014
    Messages:
    5,608
    Likes Received:
    9,779
    Location:
    East Sussex
    My tube may be narrower than yours but I have air suspension, which tilts me man backwards so that I can empty my tank quicker than a racehorse on Viagra
     
    • Funny Funny x 1
  20. DuxDeluxe

    DuxDeluxe Funster Life Member

    Joined:
    Jul 10, 2008
    Messages:
    9,360
    Likes Received:
    25,076
    Location:
    Planet Zog
    Boasting again.......;)
     
    • Funny Funny x 2
Loading...

Share This Page