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Thread: Running external water pipe
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05-05-2021, 05:42 PM #1
Running external water pipe
Hi,
I have an external tap in the garden and need to get a feed to the pond about 4m away for trickle in via a declorinator. How can I best do this without burrying the pipe as the patio is paved so the run will need to be above ground. My concern is freezing in winter.
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05-05-2021, 05:48 PM #2Freddyboy the legend
"we are water keepers first"
Johnathan
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05-05-2021, 05:54 PM #3
If it's above ground the only option is lagging. Is it possible to run round the edge of the patio and cut a small part of the slaps to at least hide, would still need lagging but at least out of sight and protected
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05-05-2021, 06:03 PM #4
Red circle the cold feed from utility room and blue line will be the run.
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05-05-2021, 06:14 PM #5
Is that not just slate at the edge on the paving.?
Failing that as nige says lagging and to tidy and protect just use some fence boards to box it in. Could even maybe ott like box it in lag it and pour polystyrene balls in around the pipe use 6inch boards it with stand a canny cold spell. And if running a trickle it make in almost impossible to freeze
Sent from my F5121 using TapatalkFreddyboy the legend
"we are water keepers first"
Johnathan
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05-05-2021, 07:00 PM #6
It is a slate boarder yes but it's not that deep. Not deep enough to protect from frost anyway.
What would be the best thing to use for lagging and will that alone project from frost? Given that water will be following through it 24/7 also assume that will have some bearing on preventing freezing, although as a trickle in its not going to be much of a flow I guess.
Also, any recommendation on type of pipe?
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05-05-2021, 07:02 PM #7
Pipe I would use the blue poly pipe.
No way of cutting a channel out for pipe
Armaflex is one of the better lags I think
Sent from my F5121 using TapatalkFreddyboy the legend
"we are water keepers first"
Johnathan
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05-05-2021, 07:07 PM #8
Agree with AJ , lagging will protect from frost
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06-05-2021, 09:06 AM #9
My old pond had hosepipe running in 40mm waste pipe that was only roughly 2" under ground, it never froze up in 14 Years - my new trickle in is in the same conduit (Under finished paths so really did not want to dig them in deeper), it lasted out the last winter, not saying it will never freeze but it seems to have done the job so far.
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06-05-2021, 09:41 AM #10
Reassuring, thanks all.
I'll use Hep20 plastic water pipe and pushfit fittings, wrapped in Armaflex. Doesn't seem the polypipe comes in 15mm which is what the feed is coming out of the house, however it doesn't seem to matter as long as the pipe is not exposed to UV/the sun.
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dbs Thanked / Liked this Post
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06-05-2021, 09:42 AM #11
I'll also dig it into the ground as much as possible, although that may only be a couple of inches also.
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06-05-2021, 10:18 AM #12
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06-05-2021, 10:42 AM #13
Polypipe or other brands of MDPE pipe would be better to use than plastic because, if it freezes, it won't burst. You can get 20mm which is the usual size for running water supplies. It will need fittings at each end to adapt it to standard pipe fittings and these come in a range that will suit whatever you want to connect to.
You can buy fittings at any good plumbers' supplier and below is a link to one supplier on eBay which shows a good range. If you scroll through the images, there is also a guide as to how to fit them:
MDPE Plastic Compression Fitting PE100 LDPE Water Pipe WRAS Approved | eBay
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06-05-2021, 10:47 AM #14
I also used 20mm blue HDPE pipe for mine. I threaded it through some heavy duty pond hose (it was much easier to thread the pipe through than I thought it would be). This was to both insulate it but also provide some protection from putting a spade through the pipe if anyone need to dig the garden up for whatever reason.
Although I buried mine, so whether insulation directly around the pipe would work better if running surface, I'm not sure.
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Manky Sanke Thanked / Liked this Post
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06-05-2021, 11:57 AM #15
To do that id need to go from 15mm copper coming out the house to 20mm mdpe then back to 15mm at the declorinator. Is there any problem with that?
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06-05-2021, 12:09 PM #16
No problem whatsoever whether you need to connect to a 15mm male or female thread. Just get all your fittings from a plumbing supplier and they will give you the appropriate ones for your purpose.
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06-05-2021, 12:10 PM #17
Nope. That's exactly what I did.
You get a push fit straight connector that steps down to 15mm. Although in my filter shed I used 15mm PEX pipe rather than copper. Mainly to reduce the chance of the pipe breaking if it did freeze over (it is lagged). But also to reduce the amount of copper the water is exposed to, especially as the water will be mostly sat static in parts of the pipework e.g. supply pipe to my drum.
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06-05-2021, 12:23 PM #18
Just went out to feed fish, so thought I'd take a snap.
As you can see the blue 20mm mdpe pipe comes with fittings to go on both copper pipe and also white PEX pipe.
I'm trying to work out why I put in a short bit of copper pipe for the tap? I guess it was because I didn't have the fittings to attach the PEX pipe to the tap.
The white PEX pipe then goes to a t, one to feed my drum filter and the other to top-up the pond via a dechlorinator.
Sent from my Pixel 4a (5G) using Tapatalk13,000L fibreglassed raised pond with window
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06-05-2021, 05:23 PM #19
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06-05-2021, 05:46 PM #20
IV just read through and thinking how easy plumbing is now compared to 50 years ago when I was a appreciate stone mason, when things where quite for stonework/ brickwork we used to help other trades. I used to help plumbers and think glad I'm not his apprentice. Now,,,, wish I was a plumber, money for old rope
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