Hi all,

Wanna ask, for the floor drain of the washing machine, normally how do you finish it? Currently I just ask the contractor to extend the drain pipe a few inches above the floor, like the picture below. So later I can just put the hose into this pipe.


But I also come across with this type of floor trap, with an adaptor for the hose. Just wondering, if this type will be a better option?


Thanks

This is what I'm using for more than a year now, 1 for washing machine and another for my air cond drain pipe



This post has been edited by stormaker: Apr 12 2023, 02:08 PM

The hose need return air just like you pour water from a bottle. The air need to enter the bottle so that water can flow out easily.

Since you have a fixed PVC inlet, I'd suggest that you use something like Y connector. One for water to go into drain and left the other one opened for air to come in.

I think your method is better, though I think it could be too short. You can buy the backflow prevention valve from Taobao.

About the one integrated to the flow trap, I think it is a solution for apartments. In China, many property owners converted their balconies into laundry areas. So, the floor traps with adaptors are hot selling products.

thanks for the info. actually mine haven't done yet, the picture is from google. now considering which one to do since the contractor is going to do the tiling soon

The one with the floor trap will be a better option. There is technical reason to it.

The direct discharge is without any trap. There is no water seal to prevent the foul smell or vermin ( cockroaches / insect ) to go back to the washing machine. Your washing machine will be exposed to the risk.

The option with the floor trap has the water seal inside the floor trap. The water seal can prevent the foul smell & vermin to enter the washing machine.

great, that's what i read also about the smell. but with the adaptor, i'm not sure if it will fit the standard hose from the washing machine or not

thanks for the info. actually mine haven't done yet, the picture is from google.

for my idea if just using the pipe, the pipe will be slightly bigger and i will just slot in the washing machine hose into the pipe, there will still be gaps around the pipe and hose for the air to go in

the name already adaptor = to adapt.

If the size cannot fit, look for a connector from the hardware. There should be a connector which can connect properly.

thanks, do you just plug in this piece into the pipe?

ya will check out a bit on this, else different brands will have difference size/type then maybe can't find it locally too

99.9% you can find a match. Discharge hose is not a high tech product, no manufacturer will purposely create the odd sizes to trouble consumer, they will opt for the standard sizes available in the market.

Yes, and it's at the back of the washing machine, corner of washing area, so I'm not worry that someone will knock it from out of place since it's not accessible ,eventhough it's not secure tightly.

This post has been edited by stormaker: Apr 12 2023, 03:19 PM

Mine had issue when the pipe was too high. Water can't discharge and resulted to machine not functioning properly. Only resolved when it's lowered.

This post has been edited by Xccess: Apr 17 2023, 01:16 AM

Hi.

I really need advice here. Having problem deciding the plumbing and connector to floor drain at my yard. I need to discharge water from 2 outlets (from sink and washing machine) to 1 floor drain (existing drainage). Layout plan at yard as attached picture.

Current plan, to use H-type connector (like the attached picture) with the water seal (self sealing). I prefer to have water seal due to the functionality of blocking the smell and vermin like u mentioned here. The thing is i’m not sure if this plan is the best for the water flow as i have seen a lot of sharing that with the water seal the water from washing machine tends to overflow the floor drain.

Also not sure if 2 outlets to 1 floor drain is the best option for the long term use. Someone commented that most probably the grease water from sink will flow to the washing machine


Layout plan at yard




H-type connector for sink and washing machine outlets



This post has been edited by Bijisss: Oct 17 2023, 07:26 PM

the water seal will depends on the downpipe size of the existing drain. if it's a big one like 4" diameter or bigger then it should be ok. if it's smaller then will have a risk of overflowing

Thanks for highlighting this. I need to check on the downpipe size first.

It is a valid concern. The connector was at your unit level without any mechanism to prevent back flow. If installed with poor gradient, there connector will always contains the waste water inside. There is risk this waste water will be back flowed into the washing machine.

The kitchen waste water, better hack the floor, direct connect into the floor trap instead of using the connector.

I have limitation - no floor hacking is allowed. from what i can see, connector is the only way.

After reading your comment, I have discussed with my contractor, and we have decided to change to F-type connector instead of H-type - washing machine outlet will be connected to the upper part of the connector. It also has been confirmed that the floor is sloped to the floor drain, so hopefully no overflow issue.

Thanks so much for your pointers, really appreciate it.

Just to update, i think i will change plan based on your suggestion, i wont use connector, instead i will add slab at washing machine area and the 2 outlets will be concealed by cement. With this plan the 2 outlets will be extended directly into the floor drain.