Forum Discussion

noteven's avatar
noteven
Explorer III
Jul 19, 2015

Identifying holding tank material

The grey water tank in our Carriage 5th wheel is dripping at a previously repaired spot right at the outlet connection. The previous repair appears to be a hardish white material finger applied to the area. It has been holding for many tank cycles but started to drip last trip. I would like to remove this patch and weld the leak.

The tank is hard black plastic with a faint "orange peel" appearance, and is a bit glossy. Does this identify whether it is ABS or polyethylene?

If no can tell this way, I would have to remove more cover / insulation to see if I can discover a label or part number...

Thanks

8 Replies

  • ktmrfs's avatar
    ktmrfs
    Explorer III
    Jul 22, 2015
    And, if you need to build the area up, get a piece of ABS (pipe etc.) use a course wood rasp to make a pile of ABS filing. Then mix it with either MEK or Acetone into a very thick paste and quickly build that up over the repair area.
  • noteven's avatar
    noteven
    Explorer III
    Jul 21, 2015
    Yes I am drying the area then going to remove the current prev owner patch...by the nature of that patch I think I might have a chance with some ABS supplies I have on hand.

    Thanks
  • DaHose's avatar
    DaHose
    Explorer
    Jul 20, 2015
    Agree with ktmrfs. ABS glue is MEK with ABS dissolved in it. Might be all you need.

    Jose
  • ktmrfs's avatar
    ktmrfs
    Explorer III
    Jul 20, 2015
    description sound like ABS. And ABS is really easy to repair with a solvent weld. in fact if the hole is small hardware store ABS thick bodied black cement may be all it takes.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,358 PostsLatest Activity: Feb 05, 2026