Moving Washing Machine - Waste Pipe

[Aberdeen1981]

Posted this in the appliance Forum but think it may be more applicable here:

As part of a kitchen refit, I'm planning on moving the washing machine from it's posistion beside the sink to the opposite wall.

The waste inlet is currently right under the sink so I wonder if anyone can advise if it's as simple as running an extended waste pipe round the edge of the walls and feeding it into the same waste inlet?

Grateful for any advice. If you need any more info then please ask.

Many thanks.

 

[Diyisfun]

It is as simple as that but you need a fall on the pipe.
The plumbers will ask how long in the new run of pipe.
Im a diyer

 

[Legion]

Waste is pumped, no need for a fall but not sure on the length you can go to when extending the pipe, best check MIs or phone manufacturer. Are you talking about extendending the hose waste? because that would be best option.

 

[Aberdeen1981]

Yeah, I'm planning on running a longer bit of waste hose around the walls and into the current waste inlet under the sink.

Would there be an issue if the waste pipe travelled upward at any point? Or as it's pumped would that be ok?

Length of pipe is likely to be around 5m.

 

[Richard C]

Waste is pumped, no need for a fall but not sure on the length you can go to when extending the pipe, best check MIs or phone manufacturer. Are you talking about extendending the hose waste? because that would be best option.

Of course you need a fall on a waste run, it should be between 18 & 90mm per metre; I’m also pretty sure that both Building Control & the appliance manufacturer would rather disagree with that.

The maximum length of 40mm unvented waste run is just 3m so you will need either an anti vac trap or another means of venting the waste run or the trap will siphon &, under certain circumstances, you may even siphon the water from your appliance.

 

[Legion]

Waste is pumped, no need for a fall but not sure on the length you can go to when extending the pipe, best check MIs or phone manufacturer. Are you talking about extendending the hose waste? because that would be best option.

Of course you need a fall on a waste run, it should be between 18 & 90mm per metre; I’m also pretty sure that both Building Control & the appliance manufacturer would rather disagree with that.

The maximum length of 40mm unvented waste run is just 3m so you will need either an anti vac trap or another means of venting the waste run or the trap will siphon &, under certain circumstances, you may even siphon the water from your appliance.

Its not a waste pipe he`s running, he`s planning on extending waste. hose

 

[Legion]

Yeah, I'm planning on running a longer bit of waste hose around the walls and into the current waste inlet under the sink.

Would there be an issue if the waste pipe travelled upward at any point? Or as it's pumped would that be ok?

Length of pipe is likely to be around 5m.

It`s perfectly o.k to extend that`s why they sell `em not sure how long is wise to extend 5m might be pushing it, give manufacturer a bell.

 

[Richard C]

Its not a waste pipe he`s running, he`s planning on extending waste. hose

Yes you can extend the outlet hose but there is both technical (down to pump spec.) & practical restrictions on the maximum length of hose. The flexible hose from the machine must also discharge into the waste pipe above the level of the top of the drum or in all probability it will continue to siphon the water out of the drum during the drain/fill cycles. Practical extension will probably be just a few feet & it must have a fall; without one, a 15 foot drain hose would hold standing water that would become pretty disgusting with congealed detergent & god knows what else inside & start to smell like several dead rats after just a few months and the smell would come out through the your washer. I once chucked a perfectly functioning 15 year old w/mc away simply because no matter what it was cleaned with, you just could not get rid of the crap inside it & the smell that went with it.

 

[glasgowgas]

Charlie, play nice now.

 

[Legion]

The flexible hose from the machine must also discharge into the waste pipe above the level of the top of the drum

Practical extension will probably be just a few feet & it must have a fall;

How do you put a fall on the flexi hose if the dicharge level is higher than top of the drum?
Maybe he should put wash machine on top of unit rather than below.

Practical extension will probably be just a few feet

then

a 15 foot drain hose would hold standing water that would become pretty disgusting with congealed detergent

 

[Richard C]

How do you put a fall on the flexi hose if the dicharge level is higher than top of the drum?

Give you that one ; should have read the maximum height of the water level inside the drum; the flexi hose installation involves it being clipped to the back of the machine somewhere between this & the top of the appliance. Under normal circumstances, with a stand pipe or waste connection, this would ensure you don’t siphon the appliance. When extending the hose, this means in practical terms you will have the difference in the maximum height you can get the hose, down to the water level inside the drum before you should connect to the waste.

Maybe he should put wash machine on top of unit rather than below.

That’s one solution.