In terms of the waste trap itself the document states that it should be at minimum 40mm in diameter and the depth water in the trap to form an effective seal should be at least 75mm. As the cupboards under kitchen sinks are notorious for storing items that don’t fit anywhere else the first job is to clear some space to work in.

If your sink has a strainer then it may be connected in a similar way to the image below, in which case you can simply replace the 90° joint with a T-joint and screw on 40mm appliance compression nozzle. The next job is to remove the old waste trap. This is a fairly easy task and just involves unscrewing the 2 compression nuts holding it in place.Installing a self sealing vent, because it reduces negative pressure in the waste system, can be used to remove the noises associated with gurgling pipes and basins. It also removes the need for air admittance valves. Positioning Appliances and Waste Outlets In terms of the height, the top of the standpipe should be 100mm under the underside of the worktop. If there is no worktop then the top of the waste pipe should finish at approximately 50mm down from the top of the washing machine or dishwasher. Quite often there is some nasty sludge in there also and you don’t want that getting everywhere either. Installing a washing machine trap to remove waste water for a washing machine or dishwasher does involve a fair bit of work to do it properly, but to avoid any future issues it’s certainly something that needs to be done correctly. Further Help

Ideally any washing machine, dishwasher or similar should be installed as close to a foul drainage point as possible, this is normally around the sink area. We always prefer to use solvent weld or compression fittings when it comes to waste pipes because once it is made, it stays together and there is no chance of any leaky joints. So, in answer to the question of; do you have to install a waste trap? The answer is a definite yes! Tools and Materials Needed for Installing a Waste Trap In this case you can simply drill a hole through the wall and run the appliance waste through it out to the drain or connect to the soil pipe using a strap on boss. With the hole drilled cut a length of pipe to run from the hole to the drain or soil pipe and glue a 90° joint to the end and then slip on 2 pipe clips and position them at around a third of the length of the pipe each. This will ensure the pipe in the next step is the right length to run through the wall.

Tools and Materials Needed for Installing a Waste Trap

Once the waste hose is connected you can tighten up the jubilee clip to make the hose really secure. Jubilee Clip On Washing Machine Waste Pipe this is one situation that pops up frequently, what do you do if you have both a dishwasher and washing machine trying to connect up to a single spigot? Well, I talk about this in more detail here, but I will add the TL;DR below! In some cases like this it may be possible to extend the waste pipe hose on the appliance to reach a little further but this should only be done if the manufacturer allows it and you use the correct extension kit stated by the manufacturers and that it doesn’t exceed a total length once extended of more than 1.5 metres. This is due to the fact that any new pipework that will need to be installed for any wastes can be kept to a minimum, especially if using a combined sink and appliance waste trap as the appliance waste hose is only a set length.

Pop the new waste trap in place, making sure the pipes that it connects to are pushed right down to the collars and move the washers and seals into place and screw up the screw caps nice and tightly. Fortunately waste traps for both machines are the same so in this guide we look at how to install a washing machine trap to deal with washing machine or dishwasher waste water. What is a Waste Trap?Pop 2 pipe clips over the pipe and fix them to the wall using 40mm screws and wall plugs, ensuring the pipes totally vertically level using a spirit level.