How connect washing machine hose waste?

A warm welcome to the Bunnings Workshop community and thank you for your question about connecting a waste hose in your new home.

Can you advise what the diameter of the PVC pipes is?

Generally, they will be 50mm, in which case you can use this Caroma 50mm Garbage Disposal Trap Adaptor With Dishwasher Connection.

You may get lucky, and everything will line up so you can simply unscrew and replace this piece before screwing everything back together.

If this is not the case, you will need a plumber to assist you with modifying and installing new pipes.

Once this tee piece has been changed, you can connect your washing machine's waste hose to the spigot on the new tee piece. Check out How to connect a dishwasher for an easy-to-follow guide.

Let me know what you think and if you have further questions, please don't hesitate to ask.

Jacob

Hi Jacob,

Thanks for your reply and suggestion.

I am not sure which part that I need to measure so I did few measurements.

I took the blue part out (photo 2 in the previous post)

- I can't measure the other end which I need to connect to as I can't see the measure. So I measured the opposite pipe (photo 2)- it is around 43mm

- The connection to the pipe (photo 3) - it is around 48mm

- The pipe which was connected between them is around 34mm (photo 4)

Does the 50cm PVC connection work?

Thanks,

Upon review, this Caroma 50mm Double Bowl Connector is likely a better option as it is stocked in many of our stores whereas the one I previously recommended is a Special-Order item. This means you can take your pipe in-store to compare and ensure they will work together.

It is worth bringing the piece you've removed in-store to compare. I'm sure the Plumbing team at your local store would be happy to help confirm compatibility. Showing them, your photos will also help.

I've indicated the measurements that will be important below.

As long as the thread connections I have highlighted above are the same diameter, it should work fine.

From the connecting pieces you've measured, it seems like the 50mm connector will work.

Let me know if you have any further questions.

Jacob

Thanks. I will give it a try.

Hi Jacob,

I went to Bunnings with the piece. Bunning staff couldn't find the piece that matches my piece. I ended up buying this instead as recommended by Bunnings staff https://www.bunnings.com.au/holman-50mm-s-p-trap-combo-set_p0503457

I changed the pipe and it looks good- like what I need (2 waste holes- photo attached). However, after running the water test from the tap, water just pull out from the two spigots even with a low water run. It does't happen like this with the old trap.

Do you know why the water is pulled out from the two spigots and do you know how to fix this ?

Thanks

When you tested the water, was it coming down from the sink above? Or through the discharge hoses that are attached to the spigots?

These spigots often come closed requiring you to drill them out for use. If the water is coming from the hoses, then this is likely the issue. If this is the case, you'll have to drill down through the spigot to open them up. Check out step 4 in How to connect a dishwasher.

If the water is coming up and out of the spigots, I suspect the top spigot is more likely the issue. A hose on the outside of the spigot with a clamp will create a better seal than one that is inserted in the spigot. If you can change the top hose so it sits over the spigot and can be tightened with a screw clamp, then this will likely solve the issue.

If either of these solutions don't fix the issue, you may need to speak with a plumber for their assistance.

Let me know what you think and if you have further questions, please don't hesitate to ask.

Jacob

Hi Jacob,

When I tested the water, it was coming down from the sink above with the sink tap running.

The set that I bought, it has already had wholes on that two spigots. It came with a plug, I took the plug out and there is a hole on each spigot for me to connect to the dryer and washer. I used the clamp for washer, but the dryer hose fits inside the spigot so I can't use a clamp.

The water pulled out from two spigots.

I think the pipe from the P shape doesn't push the water up to drain quickly enough (even on the slow water run). That is why the water fills up to the spigots and escapes from there. That is strange as this doesn't happen to my old P shape pipe with one spigot. I swapped back to my old pipe and the water flowed ok. Can this be product's fault?

Thanks,

EricL

Hello @Tamdaolam

I just want to be sure you drilled the spigots with a large drill bit, yes? Sometimes if the drain hole in the spigot is not drilled properly water will either drain slowly or it will return. In regards to the dryers drain hose an adapter must be purchased to reduce the size so that you can clamp the dryers drain hose.

Please double check and let me know if the spigot is properly drilled.

If you need further assistance, please let me know.

Eric

Hi Eric,

Luckily I don't need to drill the hole for the spigots on the product that I bought as it has hole in there already. I only need to unplug the cap and it is ready to connect so the whole shouldn't be the issue.

When the sink tap turns on, the water fills the pipe from the bottom up. The first washer spigot is struggle first (even with a clamp), then the dryer spigot next.

EricL

Hi @Tamdaolam

That is very strange indeed, I don't understand why you are getting flow back from the spouts, it should work smoothly. The only reason that comes to mind is that the waste pump of your machine is too strong, and the waste connection can't cope.

I suggest engaging the services of a licensed plumber as they will know where to position your dryer outlet.

If you need further assistance, please let us know.

Eric

Hi Eric,

I haven't run the test for the washing machine or the dryer yet so the issue shouldn't be from the waste pump of my machine right. This issue occurs simply when I run the water from the sink tap to the pipe and water pull out from the spigots. It is really strange.

Thanks for all the assistance.