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Watchmaker Wizard
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Topic # 110729 15-Oct-2012 13:12 Send private message

Now, I'll start by saying I'm well aware of the potential for catastrophe here, which is why I want a better solution ;)

I got fed up with a certain someone hassling me about getting a dishwasher, so on the grounds that I didn't have to pay for it, we've now got one.

Now, the problem is, the only place to put it is not within convenient range of any easy method of plumbing it in.

It turns out that washing machines & dishwashers use the same 3/4"\20mm BSP connectors that standard garden hoses use (you can see where I'm going with this). So, I've drilled a small ~1.5cm hole through the gib into the laundry where there is a connector for the washing machine on the taps, and I've run a "standard" garden hose through this and connected it within an inch of its life to stop things popping.

I'm not sure how much pressure it'll take before these will pop but it seems pretty stable and everything works well, drainage isn't a problem as I've been able to adapt a drainage hose to safely run into the kitchen sink.

Short of major plumbing alterations, any suggestions for a less bodgy solution to this?  If I could track down a longer (approx 3m) high-pressure dishwasher\washing machine hose and a 20mm BSP Y-Splitter, then I could probably just hook it to the tap using that and it should be safe. Hardware stores don't seem to sell anything longer than the usual 2m hoses though. I'll need to drill a bigger hole to fit the connector through, so maybe a 20mm bridge-pipe rather than a big hole & sealant?

As it stands, despite the fact it seems fine, I don't want to find out otherwise when someone forgets to turn the tap off and the hose pops.

Any better suggestions gratefully received.




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  Reply # 701444 15-Oct-2012 13:22 Send private message



You can do a lot of plumbing yourself with the hepworth push fit system and pipe which they sell at Bunnings, which you can connect to your existing pipes, although not sure about connecting it to copper ones. Even if you only do it temporarily, it will be a lot better than using a hose.

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  Reply # 701447 15-Oct-2012 13:23 Send private message

Just a quick comment about invalidating insurance...

Fundamentally though, this should work fine and basically mimmicks what would be going on if you plumbed it in correctly anyway.

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  Reply # 701459 15-Oct-2012 13:44

stevenz:I'm not sure how much pressure it'll take before these will pop but it seems pretty stable and everything works well, drainage isn't a problem as I've been able to adapt a drainage hose to safely run into the kitchen sink.



Into the sink or into the sink drain? If into the sink, sooner or later you will be caught by something blocking the plug hole and the dishwasher will overflow the sink. You can get traps with a dishwasher inlet or extensions with a hose inlet so the water goes directly into the pipe below the sink.

Garden hose isn't really good enough. Even high pressure hose is isolated by a solenoid at the tap on some models of appliance.

What sort of tap does your sink have? If it is a mixer you will have scope for connecting the DW at the point the flexible hose attaches.

Remember that plumbing is a restricted trade so any mistakes will have the added embarrassment of being an offence against some Act or other.

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  Reply # 701462 15-Oct-2012 13:48 Send private message

Bung: >Remember that plumbing is a restricted trade so any mistakes will have the added embarrassment of being an offence against some Act or other.


Really? Where does it say that for a simple job?



Watchmaker Wizard
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  Reply # 701477 15-Oct-2012 14:12 Send private message

Hmm, hadn't considered the likely invalidation of insurance. If I can do the job "properly" then presumably it wouldn't be considered to be any worse than just screwing on the usual hose though.

As I'm not intending any permanent alteration of the mains plumbing, I can't imagine there being any beaurocratic issues, but who knows what with all the red tape these days.

I did think to check the sink capacity by leaving the plug in when I tested it, as it's a pretty big sink, the total water on a "normal" cycle was a couple of inches shy of the top, so all should be okay on that front. It's not a mixer unit unfortunately.

Those Hepworth pipes look like a good possibility, I'll pop into Bunnings after work and check them out.




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  Reply # 701499 15-Oct-2012 14:35

mattwnz:
Bung: >Remember that plumbing is a restricted trade so any mistakes will have the added embarrassment of being an offence against some Act or other.


Really? Where does it say that for a simple job?


Summary here http://www.masterplumbers.org.nz/sanitary-plumbing/

I must admit that I'm surprised at some of the urban areas with an owner occupier exemption, I'd thought that those exemptions were mainly rural.

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  Reply # 701503 15-Oct-2012 14:41 Send private message

Bung:
mattwnz:
Bung: >Remember that plumbing is a restricted trade so any mistakes will have the added embarrassment of being an offence against some Act or other.


Really? Where does it say that for a simple job?


Summary here http://www.masterplumbers.org.nz/sanitary-plumbing/

I must admit that I'm surprised at some of the urban areas with an owner occupier exemption, I'd thought that those exemptions were mainly rural.


Yes that is surprising that there are exceptions for those places. If they have that sort of rule, it should apply to everyone or noone. Makes you wonder then why they sell plumbing parts to the general public then along with all the other things. I guess you are free to fix something that is already in place, just not create new plumbing lines.

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  Reply # 701507 15-Oct-2012 14:48 Send private message

Yeah from mammary there is something about distances too. Like you're allowed to fix what's there, but if you move tap outlets more than 10cm or so then it has to be done professionally. I'd need to look long and hard to find where I read that...

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