Basic Plumbing Question

EH75

EH75

EH75

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Scotland / Norfolk
Recently installed a new washing machine but the waste pipe isn't quite long enough. It reaches the waste connection (just) but it is so stretched that it isn't making a proper seal and so there is a small leak. I guess the easiest way to fix this is just to extend the white plumbing pipe slightly? I know you can get washing machine waste pipe extension hoses but that seems excessive for an extra few cm. How would I go about doing this? If you look at the picture below, can I get a slightly longer screw in section (circled in red) or do I need to get a longer bit of the blue circled section? The latter I think is solvent connected so not sure how easy it is to remove and replace it? Changing the screwed in section or screwing another bit on here would seem easier?

Not done much plumbing before but I think this should be relatively straighforward just not 100% sure of the best way to go about it and what I need to buy. Any advice appreciated. BTW I have tried pulling on the hose to get it on the waste a bit more but its pretty much at its full extent there.

1.jpg

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Yeah I'm not entirely sure why they cut the hole there when the kitchen was put in. I would've thought putting it higher up would make more sense. I was trying to avoid having to take the washing machine out completely though and I don't really want to replace the waste hose on the back of the machine in case I screw it up and create a small leak in a place I can't see it. At least if I mess up the waste end of the connection it will be pretty obvious.
 
All waste water is pumped up, it doesn't matter really.

The blue bit you mention is solvent welded, so would need to be cut and then joined using a compression coupling, something like this will give you the extra length you require, it won't look the prettiest but is the simplest and cheapest method and it's hidden in a cupboard.

(I presume a link for waste pipe is allowed as overclockers don't currently do plumbing)

www.screwfix.com

FloPlast WC08 Universal Compression Waste Straight Coupler White 40mm x 40mm - Screwfix

Order online at Screwfix.com. Made from polypropylene, this quick and easy to install waste system incorporates a compression outlet that accepts plastic and copper pipes. No solvent welding required. It is recommended that externally installed polypropylene waste systems are protected against...
www.screwfix.com www.screwfix.com
 
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sx_turbo said:
All waste water is pumped up, it doesn't matter really.

The blue bit you mention is solvent welded, so would need to be cut and then joined using a compression coupling, something like this will give you the extra length you require, it won't look the prettiest but is the simplest and cheapest method and it's hidden in a cupboard.

(I presume a link for waste pipe is allowed as overclockers don't currently do plumbing)

www.screwfix.com

FloPlast WC08 Universal Compression Waste Straight Coupler White 40mm x 40mm - Screwfix

Order online at Screwfix.com. Made from polypropylene, this quick and easy to install waste system incorporates a compression outlet that accepts plastic and copper pipes. No solvent welding required. It is recommended that externally installed polypropylene waste systems are protected against...
www.screwfix.com www.screwfix.com
Click to expand...

So basically buy that, unscrew the waste fitting, screw that on and then refit the waste connection on the end? So I essentially end up with 2 of the things circled in red joined together? Makes sense.
 
EH75 said:
So basically buy that, unscrew the waste fitting, screw that on and then refit the waste connection on the end? So I essentially end up with 2 of the things circled in red joined together? Makes sense.
Click to expand...

Unfortunately they won't connect like that.

You will need to cut the pipe circles in blue in the middle and add this in keeping the rest of the pipework.

You might also benefit getting a 90 degree waste adaptor rather than a straight one you currently have. https://www.diy.com/departments/mca...r-connection-to-multifit/5036484006646_BQ.prd
 
I am a devil for using solvent, so I would chop the blue pipe and then replace the everything up to the felxible pipe. Extend the existing blue area then just pop a 90 degree compression bend on there, and fit an Appliance Nozzle Socket.
It is more expensive. About £24. But a lot better. You can buy it all at Wickes.
 
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EH75 said:
Yeah I'm not entirely sure why they cut the hole there when the kitchen was put in. I would've thought putting it higher up would make more sense. I was trying to avoid having to take the washing machine out completely though and I don't really want to replace the waste hose on the back of the machine in case I screw it up and create a small leak in a place I can't see it. At least if I mess up the waste end of the connection it will be pretty obvious.
Click to expand...
You can get an extension to your washing machine waste, it just goes on the end, I’ve got one on my dishwasher, no need to remove the one you already have
 
ristac said:
You can get an extension to your washing machine waste, it just goes on the end, I’ve got one on my dishwasher, no need to remove the one you already have
Click to expand...

This is also what I would do.
The other advantage is that the hose is not stretched and that means you can move the machine with the hose still connected.

I have an extension on my dishwasher as well, I can pull it fully out without disconnecting the hose at all.
Technically the manufacturers don't like them, but I have pretty much always used them and never had any issues.
 
Right, so I tried the waste hose extension idea but the part I bought (from screwfix) didn't fit very well and I didn't want to flood my utility room. I think I may have bought a replacement hose instead of an extension (although plenty people in the reviews saying they used it as an extension?) maybe I needed an adapter or something.

Anyway I got bored with messing around with that and just got some new waste piping and solvent cement and have extended the waste pipe round the corner a bit and re routed the waste hose so it comes through the cabinet further back. It is no longer stretched and looks to have a pretty good seal now. Says you should wait 12 hours for the solvent to fully cure before using it so we'll find out tomorrow if it's worked or not. Looks OK though...
 
It's still leaking! The leak is coming from the join onto the spiggot where the jubilee clip with the yellow thumb screw is. Rest of the plumbing seems watertight though... The jubilee clip is on as tight as it will go and I can't get the waste hose on any further than it already is. I put it in boiling water etc before putting it on to try and get it on as far as possible. What have I done wrong and what is the next step here?

 
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Does the grey dishwasher pipe fit on to the white connector with a tight fit? Do you need the black adapter? It doesn't look like its pushed on very far.
 
In not sure tbh i tried to take the adapter off before but I couldn't get it off. There is a lip inside the middle of the adapter which is what it's stopping it going on any further.
 
I just presumed the adapter was essentially part of the hose? It seemed so tight almost like it was glued on, I didn't want to try and force it off and damage the hose, then I've got a whole other problem...
 
Ok I've had another look, no way that black bit is coming off, I'm pretty sure its glued on. I even had it sitting in hot water there for 10 minutes, doesn't want to budge. In any case if you look inside the connection it looks like the grey bit is narrower so I don't think it is going to go any further down the spiggot?





 
The white plastic, male waste nipple looks a bit too big. Get a smaller one and you should be good.

EDIT - Is that black end on the extension pipe hard plastic or soft? If its hard, that jubilee isnt going to do much when you tighten it up, other than make it oval and leak.
 
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EH75 said:
It's still leaking! The leak is coming from the join onto the spiggot where the jubilee clip with the yellow thumb screw is. Rest of the plumbing seems watertight though... The jubilee clip is on as tight as it will go and I can't get the waste hose on any further than it already is. I put it in boiling water etc before putting it on to try and get it on as far as possible. What have I done wrong and what is the next step here?

Click to expand...
Personally I would have put a u bend and standpipe in there, you run the risk of backfilling with a spigot.
 
Is it a brand new dishwasher? Possibly someone has bodged it previously. That black thing seems really odd.
 
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