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How to connect heat pump dryer to drain?

I have purchased a new Electrolux washer and also a dryer. Connecting the washer drain line to the laundry sink spigot is easy as the hose has the appropriate size rubber bush to push over the barbed spigot / nipple on the trap. Our trap has two spigots / nipples and I want to connect the dryer drain to the other one. The problem is that the Electrolux dryer line is only 8 mm internally. I am looking for a rubber reducing adaptor from 19mm to 8 mm. Does anyone know where one is available? I can make one up using a 19 to 12 mm irrigation reducing bush, a lot of hot water and force, plus some short pieces of rubber hose and some clamps but it is a bit rough and ready. I cannot believe there is not a proper item available.

We will be moving soon to an apartment and this laundry sink may only have one spigot / nipple. There are Y pieces available, but all have 19 mm legs. Again, I still need one leg to suit the 8 mm. I can probably swap the trap out to one with 2 connections but are amazed that there is not a readily available fitting. Even the ones internationally on eBay are not really suited. While Electrolux have been extremely helpful with our queries this one remains unsolved.

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MitchellMc

Welcome to the Bunnings Workshop community @Crackers1753. It's terrific to have you join us, and many thanks for your question about connection a heat pump dryer.

The industry standard at the moment seems to be either using irrigation fittings to cobble together a connection or inserting the hose within the spigot and siliconing it in place. Neither are ideal, but in the absence of a proprietary fitting supplied by the machine manufacturer to adapt to standardised sink traps, that seems to be how people deal with it.

I think the issue is that there are not enough heat pump dryers out there to warrant the trap manufacturers going to the additional expense of including a special spigot for another hose size. Since they are becoming more popular, I'm sure at some point, that's something they'll look to address.

Regarding the need for dual spigots, the easiest option would likely be to swap out to a dual spigot trap.

Please let me know if you have any questions.

Mitchell

Greg1S

I've discovered a very neat solution for this. Buy one of these connectors from ebay:

Then buy a small length of 20mm clear PVC hose from Clark Rubber or similar:

(Bunnings has 19mm tubing which would probably do the job with a bit more effort to stretch it on:)

And connect them like this:

You might want to add hose clamps but you don't have to as this is neat and secure, and does not leak. All for not much more than $10 - and you'll have enough tubing left over to do a dozen or so more if you need to.

MitchellMc

Welcome to the Bunnings Workshop community @Greg1S. It's sensational to have you join us, and many thanks for jumping into the discussion.

Love your work! That looks like a neat and tidy solution.

Many thanks for sharing, as I trust our members coming across this discussion find it useful.

We look forward to hearing all about your projects and plans around the house and garden. Feel free to reach out anytime you need assistance or have something to share.

Mitchell

Twrex220

I used 16mm vinyl poly heated one end then pushed it over thev19mm spigot. Then pushed the drain hose all the way into the spigot and jubilee clipped both ends.

JacobZ

Hi @Twrex220,

Welcome to the Bunnings Workshop community, it is fantastic to have you with us.

I imagine this solution has worked well for you and others could fairly easily emulate it for their own purposes.

Thank you for sharing your solution to this fairly common issue.

Jacob

Mingles

Thanks for this - I did exactly the same as you, or about to. Just ordered the 20mm/8mm plastic adapter and picking up the PVC tubing from clark rubber soon. Cheers!

tabmow

Hi,

What is the Y piece available? I only have 1 spigot and I would rather not replace the S trap for one with dual spigots. Then I will just MacGyver the dryer hose to it.

JacobZ

Hi @tabmow,

Welcome to the Bunnings Workshop community, it is fantastic to have you with us.

I can't say I am sure what the Y piece mentioned above is referencing. Allow me to tag @Crackers1753 to see if they can advise.

There are things like this BOSTON 3/4" Washing Machine Y Hose Adaptor or this Brasshards 20mm Y Fitting Brass Tap Adaptor LF , which you might be able to "MacGyver" as you mentioned, but they wouldn't be the cleanest solutions.

I understand that replacing your trap with one with dual spigots is not ideal, but it would be the cleanest solution to the problem and is certainly worth considering if Crackers1753's solution is not suitable.

Hopefully, they will respond shortly.

Jacob

tabmow

I ended up just doing a bit of a MacGyver job, I figured if it didn't work I would just go and buy a trap with dual spigots.

I drilled a hole in the plug since when I tried to remove it, it was brittle and was likely going to break anyway and this looked cleaner.

Then I drilled a hole in the trap, used silicon to seal it and plumbed it that way.

EricL

Hello @tabmow

A very interesting solution. My best advice is to visually inspect it once a week to make sure that is not leaking.

Eric

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