Garden Irrigation Tubing

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208 posts

Master Geek
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#2521067 11-Jul-2020 12:37

Paul1977:

Possibly not toO late then, but more of a rush & expense as I’d need to get the appropriate lengths and elbows etc. I think the 19mm irrigation tubing will be sufficient as long as it’s suitable.

Cheers.

By the time you buy the extra fittings needed at each path, eg irrigation joiners, clips etc, the waste pipe is probably the same cost. But when you use the waste pipe, you don't need the extra fittings that will just reduce flow, the more you add. With the waste pipe you can run a single length of pipe with no joiners, at a later date. You don't need elbows for the waste pipe. Buy what you like though, just giving advice based on what I did. Made for running the irrigation later nice and easy.

Literally just run a straight lenght of pipe under the paths so that it comes out 100mm either site. No extra fittings needed. Then when you landscape, pass the irrigation pipe through the duct and you're sorted.

Froglotion

208 posts

Master Geek
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#2521069 11-Jul-2020 12:46

tdgeek:

What effect does a non return valve have for home irrigation? My popups don't pop up, they just leak, although once they popped up. I hold one up, and once that kicked in after a few seconds the other 3 on the line popped up, I assumed it was an air pocket issue

I'd say it's a water flow / pressure (or lack there of) issue. Likely takes a bit more pressure to pop them up than to run. When I connected mine to the house tap they did similar. When I connected them to the main, they popped straight up. There could have been air in the line the first time, but even so that shouldn't take long to purge out.

What type of popups do you have? I run some that you can install different heads depending on the coverage needed and also the water flow available. You can get heads better suited to low pressure/flow situations. I had to use those on my previous house as flow was bad. I went to my local irrigation place after testing my tap to see what sort of flow I got. As in time how long it takes to fill a bucket, then they can work out how many popups you can run and what heads you'll need. I think all my gear is Hunter branded. Paid more for fully adjustable heads. So when I have it running, I can fine tune the arc length and angle.

The non return valve will introduce minimal if any restriction on the flow. If you are having issues, you could try running them when water demand in your area is at its lowest.

Paul1977

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Uber Geek
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#2521071 11-Jul-2020 12:49

Froglotion:
Paul1977:

Possibly not toO late then, but more of a rush & expense as I’d need to get the appropriate lengths and elbows etc. I think the 19mm irrigation tubing will be sufficient as long as it’s suitable.

Cheers.

By the time you buy the extra fittings needed at each path, eg irrigation joiners, clips etc, the waste pipe is probably the same cost. But when you use the waste pipe, you don't need the extra fittings that will just reduce flow, the more you add. With the waste pipe you can run a single length of pipe with no joiners, at a later date. You don't need elbows for the waste pipe. Buy what you like though, just giving advice based on what I did. Made for running the irrigation later nice and easy.

@Froglotion Good points. What do you mean by waste pipe? The rigid uPVC stuff? If so, how do I do that without elbows? I have the rest of the weekend to sort it, so if it’s easy to do it your way is does sound better.

Froglotion

208 posts

Master Geek
+1 received by user: 78

#2521072 11-Jul-2020 12:52

Yeah just any pipe like the waste pipe plumbers use. it's solid and will stand up to the weight on a path on it. Don't need need any elbows as it's just a duct. When you do the irrigation pipework, you can run a single line as far as you want, with no extra fittings needed. Running the irrigation pipe directly under the path could risk it being squashed, then you're out of luck as it's not easy to run another line when the path is down.

Froglotion

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Master Geek
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#2521074 11-Jul-2020 13:00

I don't recommend buying anything from this place... but for irrigation ducts this should be fine, and it's cheap. Should have some in stock in town, just take a hacksaw and cut it to the sizes you need in the carpark :P

https://www.tradedepot.co.nz/pvc-dwv-drainage-pipe-40mm-x-6-metres

Jase2985

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#2521080 11-Jul-2020 13:30

Paul1977:If so, how do I do that without elbows? I have the rest of the weekend to sort it, so if it’s easy to do it your way is does sound better.

you can get a bit of a bend into them. but you can also buy swept bends which will allow the irrigation pipe to go though easier

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Paul1977

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#2521113 11-Jul-2020 14:29

Jase2985:
Paul1977:If so, how do I do that without elbows? I have the rest of the weekend to sort it, so if it’s easy to do it your way is does sound better.

you can get a bit of a bend into them. but you can also buy swept bends which will allow the irrigation pipe to go though easier

I can only see swept bends for electrical conduit. I guess electrical conduit is just as fit for purpose though.

nickb800

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#2521171 11-Jul-2020 15:28

Just cut a straight length of 40mm dwv pvc pipe, and cover the ends with duct tape to keep dirt out. It can go just below the concrete or basecourse, so you just need to dig a small hole in the garden each side to run your irrigation tubing through it at a later date

Froglotion

208 posts

Master Geek
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#2521199 11-Jul-2020 17:08

Yeah i'm not sure why you are mentioning bends. Do not install bends on the duct, it won't work. Just use straight sections. Easy peasy. If you head the waste pipe up you'll be able to give it a slight bend, but any fittings it cause issues.

Can you put up a rough layout design of what you are needing to achieve?

billgates

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#2521243 11-Jul-2020 18:26

@Paul1977 I did exactly what @Froglotion has suggested couple of weeks ago and bought the below 40mm 6M waste pipe from Bunnings and got it cut in half with a saw they had for customers to use (good guy bunnings) so that it could fit inside our SUV and bought some PVC primer and PVC concrete glue to join the cuts later onsite. Our existing driveway onsite is getting broken and getting converted into council grass verge and new driveway will be alongside it so I gave the below pipe as shown in photo to concrete pourer to lay before he re-does the council footpath and removes the old vehicle crossing so I can run 19mm poly tubes later to install popup sprinklers in council grass/lawn area outside our property. Have a think about this as well for your build if you want to take care of council lawn outside with your irrigation system.

Not sure how late it is for you but could you get your plumber to run a tap to each side of your property still using any existing external tap points that are attached to the house wall cladding. I got our plumber to do this and our sparky to run external power points on both sides of the house and attach it to the fence on either side and also ran 8 core security alarm cable to both these location from network rack location as I will place the smart irrigation controller inside that and later setup the manifolds etc below these external taps and use 19mm poly tubes off the manifolds for water irrigation. We also installed a water pump for whole house so pressure wont be an issue.

https://www.bunnings.co.nz/holman-40mm-x-6m-dwv-pipe_p4770349

Do whatever you want to do man.

Paul1977

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#2521305 11-Jul-2020 23:57

Froglotion:
Yeah i'm not sure why you are mentioning bends. Do not install bends on the duct, it won't work. Just use straight sections. Easy peasy. If you head the waste pipe up you'll be able to give it a slight bend, but any fittings it cause issues.

Can you put up a rough layout design of what you are needing to achieve?

Will be concreted right up to house on the tap side, so pipe needs to come vertically up through the concrete on the house side, but run horizontally under the path to get to garden - hence the need for a bend.

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nickb800

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#2521322 12-Jul-2020 05:13

That's a lot harder on a Sunday. Bunnings won't have 40mm dwv pvc sweeping bends (if they exist at all).

I'd suggest 32mm electrical conduit with a sweeping bend e.g.
https://www.bunnings.co.nz/deta-32mm-orange-conduit-fittings-90-sweep-bend_p0237257

Use this for joins - just wipe the pvc with a rag, don't need primer or anything fancy for this https://www.bunnings.co.nz/marley-125ml-gold-cement-solvent_p0475165

It's quite a tight radius for irrigation tube so I'd plan for 1x19mm irrigation tube per 32mm electrical conduit - lay several if you need several irrigation lines. Ideally buy the 19mm tube and run it through the conduit today too, leaving short length on either side.

Note that the sweeping elbow is orange but you can transition to a short piece of white before it comes up through the concrete. This will look much nicer as the orange colour isn't UV resistant so will fade over time

Froglotion

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Master Geek
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#2521345 12-Jul-2020 08:42

I would have suggested an irrigation box below the tap if you'd explained that to begin with. Good luck with it.

Paul1977

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#2521357 12-Jul-2020 09:17

Froglotion:

I would have suggested an irrigation box below the tap if you'd explained that to begin with. Good luck with it.

I hadn't given it the forethought it needed. I'll just have to cobble it together the best i can now with what i can find!

Paul1977

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Uber Geek
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#2521365 12-Jul-2020 09:39

nickb800: That's a lot harder on a Sunday. Bunnings won't have 40mm dwv pvc sweeping bends (if they exist at all).

I'd suggest 32mm electrical conduit with a sweeping bend e.g.
https://www.bunnings.co.nz/deta-32mm-orange-conduit-fittings-90-sweep-bend_p0237257

Use this for joins - just wipe the pvc with a rag, don't need primer or anything fancy for this https://www.bunnings.co.nz/marley-125ml-gold-cement-solvent_p0475165

It's quite a tight radius for irrigation tube so I'd plan for 1x19mm irrigation tube per 32mm electrical conduit - lay several if you need several irrigation lines. Ideally buy the 19mm tube and run it through the conduit today too, leaving short length on either side.

Note that the sweeping elbow is orange but you can transition to a short piece of white before it comes up through the concrete. This will look much nicer as the orange colour isn't UV resistant so will fade over time

Thanks.

TradeDepot actually has some 40mm electrician conduit where the conduit is orange, but the sweeping bend is white. That might at least look a little nicer since it'll be the white sticking out the ground.

My other though was sticking with the 40mm dwv and join two 45 degree bends together to give a wider bend and see if I can get a couple of 19mm tubes through without kinking them - I suspect it'll still be too tight though.

Well - I'm off to Bunnings to get some 19mm irrigation tube, then take a a couple of lengths into TradeDepot and stand there like a jackass testing what fittings I can push it through.

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