Blocked waste pipes

Discussion in 'Tech/Mech General' started by goneoff, Nov 29, 2009.

  1. goneoff

    goneoff Funster

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    I am new to owning a motorhome I have a Rapido 997M. The drain from the shower to the waste tank is blocked and emptying the hand basin in the bathroom is ridiculously slow. Question: can I use a strong chemical drain clearer to sort this out or could I do some damage in the process, or can someone suggest another method. Thanks
     
    Last edited: Nov 29, 2009
  2. CHRI$

    CHRI$ Funster

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    it might not be blocked,it might be air locked.
    try filling the basin and draining off the tank as the basin emties if it suddenly go's away you have an air lock.
    alot of motorhome suffer with slow draining sink's and showers, mine does.

    chris
     
  3. scotjimland

    scotjimland Funster Life Member

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    A kettle of boiling water sometimes works wonders.. if not hit it with any proprietary drain cleaner..

    jim
     
  4. vindiboy

    vindiboy Funster

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    I find with my van that draining is positional, my van drains best if it is slightly left hand down and nose high, maybe yours is the same, blocked pipes can be cleared with air pressure, try a sink plunger , fill the shower tray or sink with water and plunger the outlet, do it carefully though as you are dealing with fragile plastic usually, try a drop of bleach down the pipes too, or a propriety drain cleaner again take care as its plastic you are dealing with. Does your van have water traps under the sinks and shower?are they blocked?:thumb::thumb:
     
  5. vindiboy

    vindiboy Funster

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    Another method of clearing a blocked pipe in the Van you may like to try is ,get a length of curtain wire, you know the plastic coated wire that you hang net curtains on and thread this carefully through the blocked pipe as far as you can get it, this should start a flow that you could follow up with bleach or something ?:thumb::thumb::thumb:
     
  6. spongy

    spongy Read Only Funster

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    spongy


    I also have a rapido 966m my shower is ridiculously slow to empty and there does'nt appear to be any access to the trap. Not sure about using a chemical cleaner as they can react with plastic. Mine is going in to the dealer tommorrow to get the problem sorted ( hopefully) I will post later to let you know the result. Great motorhome though
     
  7. Nojazz

    Nojazz Read Only Funster

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    Go to your local musical instrument shop and buy a cleaner for trumpets and brass instruments. It comes as a long flexible cable with two small soft brushes, one each end. Does the job on blocked sinks!!!!!


    Nojazz
     
  8. spongy

    spongy Read Only Funster

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    spongy



    i have enough trumpets in our bathroom
     
  9. Spacerunner

    Spacerunner Read Only Funster

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    Check if your hand basin has a trap underneath. If so remove and clean. Although you most probably cant get to the shower drain trap the state of the basin trap will give you a good idea of the state of the shower drain.
     
  10. scotjimland

    scotjimland Funster Life Member

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    proprietary drain cleaners are caustic based which doesn't attack plastic.. in fact, many come in plastic containers .. and 99% of domestic drains are plastic

    however, caustic mixed with water heats up so care is needed not to melt the pipes.. use as instructed and it's perfectly safe.
     
  11. lufcdave7

    lufcdave7 Read Only Funster

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    The pipe work might not be blocked. We had a similar problem, the fault was too much waste pipe hanging in the waste tank. Having gained access through the trap we discovered that the pipe entered the waste tank at the top, fell to the bottom of the tank then curled up about six inches. The result was that once the waste tank was half full the weight of waste water stopped any further draining. We cut back the pipe inside the tank leaving approximately 4/5 inches, now the water drains really fast!
     
  12. Decmac

    Decmac Read Only Funster

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    Blocked pipes

    No, do NOT try to free it with boiling water . . . it can do damage to the pipes as they are not as strong as household pipes. My manual says never to try this, even if you are trying to get rid of smells. Just try a cleaner, preferably one recommended for motorhomes.:RollEyes:
     
  13. vindiboy

    vindiboy Funster

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    Be a bit careful with boiling water into your pipes and shower trays etc. thermal shock and all that.:Eeek::Eeek:
     
  14. scotjimland

    scotjimland Funster Life Member

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    don't do as I do, :Doh:

    .... I forgot I have an RV with proper domestic waste piping .
     
  15. wasp

    wasp Funster

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    Use a plunger carefully, I`ve got one that looks like a bike pump with a suction cup on the end and you just pump it ,and everything goes,:thumb: hope that helps :thumb::thumb::thumb:
     
  16. goneoff

    goneoff Funster

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    Blocked drain

    Hi Thanks for taking the time to respond, will be interested to know how you get on and the price they charge.
     
  17. Blisters

    Blisters Read Only Funster

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    As some one who deals in industrial chemical,s i.e strong acids n bases, i can tell you that if you use a strong caustic, it will attack certain plastics, by stripping them of the oils that keep them supple, and they become hard and brittle,

    you are better off with a strong acid like Sulphuric acid ( this is available from builders merchant's) however if you use this it needs to be added little but often, i.e and egg cup full every hour for about 3 hours, if you pour to much in it gets extremely hot and this will mis'shape the pipes NEVER MIX THIS PRODUCT WITH BLEACH, IT PRODUCES MUSTARD GAS

    The safest method is Biologically, try filling the system with warm water and adding a couple of scoupes of biological washing powder, drive rounnd for a few mins to aggitate, and leave over night, drain and rinse thoroughly, this should remove grease fat and hair

    Also if it is blocked uo to the point that it backs up, there is a compressed gas aerosol with a rubber bung on the end, these work purely on pressure but work well, don't know where you get them from, but maybe to strong in a van
     
  18. Jaws

    Jaws Funster Life Member

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    After trying a pucka drain rodding spring ( like an industrial strength curtain wire ), plungers, taking as much apart as poss and just about every other clever thing I could, I finally toom my better half's advice and used Mr Muscle drain unblocker

    Took a full 24 hours and a couple of doses ( it was sllllllloooooowly passing by whatever the blockage was ) but suddenly it all cleared and now the hand basin whooshes away as fast as the water can get down the plug !! ( well almost, but yo know what I mean ! :BigGrin: )

    That was when we first got the van.. Happy to report no further issues whatsover
     
  19. goneoff

    goneoff Funster

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    Really helpful many thanks
     
  20. goneoff

    goneoff Funster

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    Many thanks
     
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