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http://www.hometime.com/projects/howto/plumbing/pc2plm2.htm
Plastic pipe joints are connected with glue that actually melts the pieces together. The joints for both PVC and ABS are glued the same way, but the types aren’t interchangeable and only a special fitting can connect them together.
http://www.remodel.com/ResourceCenter/Encyclopedia/Encyclopedia.asp?pgnum=1147
http://www.pmmag.com/CDA/ArticleInformation/features/BNP__Features__Item/0,2379,4068,00.html
. Note that some people use multipurpose glue to adapt from PVC to ABS but, it is not code to do so in most areas, nor do we recommend you using multi purpose glue to go from ABS to PVC. If your pipes are ABS then you use use no-hub couplings to adapt. http://www.plumbingworld.com/eldervalve.html
PVC DRAIN PIPE AND FITTINGS 002445 4″ 4″ PVC/ABS ADAPTER SLEEVE 5.99/EA http://www.pbs-one.com/priceguide/PBS_PB.html
ADAPTER COUPLING 125mm 100mm (5 4ABS) GXG (ADAPTS PVC SPIGOT TO IPS (ABS) SPIGOT) http://www.blairsupply.com/Products/section8.htm
Manufacturers make transition cement for this purpose:
http://www.spwarehouse.com/oateych.htm http://www.portplastics.com/plastics/access/adhesive/ http://www.oatey.com/products/cements/30925.html http://www.herchem.com/SpecShts/SSPlasPxy.htm http://www.bramec.com/pages/13067.htm
Homeowners have done this: http://www.terrylove.com/wwwboard/messages/13959.html
There are questions of which tube and fittings are to be joined where for structural strength.
