Double Standpipe

[longdogs]

Is there any reason this wouldn't work? I have to connect a dishwasher and washing machine to the same waste but space is limited to have two separate standpipes and space is tight under the sink for double spigots.


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To be honest, I have a similar set up in my own kitchen which I fitted in my early years of DIY and its never caused a problem but I can't see this method recommended anywhere.

 

[AngelesPlumbing]

My guess is back siphonage, not sure

 

[Bosswhite]

You could try Trap and washing machine spigot

 

[Rob]

Mcalpine Viking hat. Double spigot for one waste pipe.

 

[newbuildinstaller]

My guess is back siphonage, not sure

why?

 

[Whitespirit66]

Is there any reason this wouldn't work? I have to connect a dishwasher and washing machine to the same waste but space is limited to have two separate standpipes and space is tight under the sink for double spigots.


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To be honest, I have a similar set up in my own kitchen which I fitted in my early years of DIY and its never caused a problem but I can't see this method recommended anywhere.

Recently installed something very similar to that. Running trap plus 2 stand pipes. No problems so far.

If space is more limited, I make something up with a 40mm tee, two 45 degree angles and two lengths of pipe to form a 'Y' shaped double machine/dish washer waste.

 

[mogget]

I had a very similar setup in my kitchen for many years. I have no idea if it was to regs or not but it worked fine, never caused any problems, no smells or syphonage.

 

[ALEC1]

of course its not recommended...the manufacturers can sell two stand pipes instead of one running trap..

and yes it will work....

 

[mogget]

I've never known you being so cynical Alec - you're right of course

 

[JohnD]

syphonage will not occur with standpipes, because they are open to the air at the top, and the waste hose is a loose fit.

 

[longdogs]

of course its not recommended...the manufacturers can sell two stand pipes instead of one running trap..

and yes it will work....

you would think that a double standpipe kit would be available seeing as its common to have two appliances.

 

[Hugh Jaleak]

What prohibits you from using the McAlpine 'twin connector' as previously suggested? http://www.mcalpineplumbing.com/traps/domestic-appliance-traps/1-189-twin-connector.html

 

[Whitespirit66]

What prohibits you from using the McAlpine 'twin connector' as previously suggested? http://www.mcalpineplumbing.com/traps/domestic-appliance-traps/1-189-twin-connector.html[/QUOTE]

Aren't some machine manufacturers a bit anti these, or is that an old wives' tale?

Anything to get out of the warranty.

 

[Hugh Jaleak]

Not heard about that, but like you say, anything to wriggle out of a warranty claim. Had Hotpoint out to my washing machine at 6 weeks old, it wasn't taking in hot water. Various excuses as to why not, including 'Modern machines don't need a hot fill'! So why fit it then? was my reply. Strangely enough, after the Hotpoint man had plugged his laptop in, and fiddled with the machine, it started to fill with hot water. Has done ever since, so don't now know if it was faulty or he switched the hot fill on.....

 

[Whitespirit66]

I could have got this wrong, but I seem to remember someone on here saying that manufacturers don't like either single or double spigot combined sink wastes, as the wastes get blocked with kitchen debris over time. Then the machines get problems pumping out against a partial or full blockage.

Or maybe I dreamt this.