Extension - Waste Pipe location advice. Extending Your Waste Pipes and Rainwater Goods for external wall insulation. You can see that the flexible waste pipe is a little too long now. A straight pipe that is too long can be cut, but one that is too short must be extended. Whether you're working with PVC, ABS or cast iron, Mission couplings are essential for fitting a section of pipe into an existing run of waste line or vent. The main task of toilet waste pipes is to carry out the flush water into the drain. We'll fix that next. We are extending our house on the side and rear. Extending PVC pipe is often done via an outer coupling, as this sort of attachment will not restrict the flow of water through the pipeline. Center the mission coupling over the third joint and tighten the bands firmly. PVC Schedule-40 pipe is used to vent waste lines for toilets and drain lines for sinks and washing machines. Drill 3/4-inch holes to accommodate 1/2-inch pipe. I need to extend the underfloor waste pipe to the next room for a new kitchen. If you are plumbing the drain under a sink using a kit, the straight pipe may not be long enough to reach the waste drain in the wall. Extending waste pipe for washing machine. A toilet waste pipe is a necessary product and may often require changing as you mature in a particular house. WaterBoy75 Member. As I am digging up the floor and re-doing the bathroom is like to confirm the best practice for connecting to the underfloor pipe. Use a level or other long straightedge to mark for straight runs from stud to stud, and use a combination square to mark for the center of studs. When carrying out External wall insulation, it is obvious that any pipework and plumbing on the wall will probably have to be extended to accommodate the new insulation, which can be several inches thick. All pipe of this variety that is the same nominal size, or trade size, has the same diameter. Srey2 New Member. Joined: Sep 21, 2009 Location: new york. The main task of toilet waste pipes is to carry out the flush water into the drain. Whichever end fits the connector connect to washing machine waste pipe with jubilee clips , other end cut off and fit to 17mm pipe outlet with Jubilee clip, The bit in the middle of your picture ( Half Round) is the support if you were to fit to an open standpipe waste fitting. Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Srey2, Sep 21, 2009. Discussion in 'Plumbers' Talk' started by WaterBoy75, Apr 4, 2018. Hello, My washing machine is a couple of cupboards down from the sink, and it doesn't have its own separate waste pipe. Current waste pipe is currently on the side of the property going into the garage... saniflo waste pipe can be connected to the waste pipe under the bath. Extending PVC Toilet waste pipe. Attach the P Trap A drain kit is designed for a typical drain, and some drain situations are not typical. 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