R-Wide tubing on its own, for replacing a worn line, adding runs to a system you already have or cutting a full roll to fit your beds. Every run needs a Bed Add-On Kit to connect. Starting from scratch? The R-Wide Kit includes the fittings.
- Wide coverage from one line. 33 ft of spray covers a full block of beds, so you run fewer lines than with narrow-pattern tubing.
- Cut to fit your beds. Buy a set length or the full 328 ft roll and cut runs to match your bed lengths.
- Predictable flow. 0.13 GPM per foot of line. Use the free System Planner to size beds against your water supply.
- Built for daily farm use. UV-stabilized polyethylene, made in Japan by Sumika Agritech. Modern Grower is the main US source.
What you get
R-Wide tubing only, in the length you pick. To run it you also need a Bed Add-On Kit for each run and a Garden Hose or Mainline Connector at the water source. The R-Wide Kit bundles the tubing with the Add-On Kit parts.
Free shipping on orders over $25 in the Lower 48 · Most orders ship within 24 hours
- 33 ft Spray width, 16.5 ft each side
- 30 PSI Rated pressure · 15 PSI minimum
- 0.47 in Water applied per hour, rain-like
- 328 ft Longest single run
R-Wide at rated pressure (0.20 MPa). Source: Sumika Agritech manufacturer specifications.
One line down the middle, eight beds watered
Lay the tube in the center path. Fine streams arc out 16.5 ft on each side in a rectangle that matches your bed block. No circles, no overlap math.
Gentle enough for seed
Fine streams at under half an inch an hour won't wash out carrot or lettuce seed or crust the bed.
Moves in minutes
A 100 ft roll weighs under 5 lb. Roll it up, carry it to the next block and hand-tighten the fittings.
Taller crops? Raise it
Once crops start blocking the spray, riser clamps lift the line above the canopy.
R-Wide or Mark II?
Same tubing family, two different jobs. Pick by your water pressure, your flow and how tall your crops get. Fittings don't cross over, so match them to your tubing.
R-Wide
You're hereLow, wide spray. One line down the center path covers eight 30 in beds.
- Spray width
- 33 ft
- Pressure
- 30 PSI rated · 15 PSI min
- Flow, 100 ft line
- 12.7 GPM per 100 ft
- On a garden hose
- Up to about 50 ft lines
you water open field beds, have good pressure and flow, and grow mostly low crops like greens, roots and alliums.
Mark II
Low-pressure specialistSteep 80° spray that throws up and over taller crops in a tighter footprint.
- Spray width
- 13 ft
- Pressure
- 12 PSI rated · 3 PSI min
- Flow, 100 ft line
- 3.6 GPM per 100 ft
- On a garden hose
- Any length, almost any hose
you grow in a greenhouse or high tunnel, have low pressure or limited flow, or water around taller crops.
Time how long your hose takes to fill a 5-gallon bucket. The Water Supply Check turns that into a recommendation; the System Planner sizes your tubing and fittings.
Will your water keep up?
R-Wide needs about 0.13 GPM for every foot of line at 30 PSI. Time how long your hose takes to fill a 5-gallon bucket: 5 ÷ (seconds ÷ 60) is your GPM.
| Line length | Flow needed | On a garden hose? |
|---|---|---|
| 15–24 ft (short) | 1.9–3.1 GPM | Yes, almost any hose |
| 25 ft | 3.2 GPM | Yes, almost any hose |
| 50 ft | 6.4 GPM | Usually. Check your flow |
| 100 ft | 12.7 GPM | At the limit: short 3/4 in hose only |
| 328 ft (full roll) | 41.9 GPM | No. Mainline or pump |
What else you need to run it
Tubing alone won't connect to water. A working line needs a Bed Add-On Kit on each run and a connector at the water source. Starting from scratch? The R-Wide Kit includes the Add-On Kit parts.
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You're on this page -
One per run: starter connector, threaded adapter, filter, end stopper -
One per water source, with or without the 30 PSI regulator -
Optional: joins two pieces of tubing
Pick your water-source connector
Add one connector to match how you feed the line.
| Compare | Garden Hose Connector | Mainline Connector |
|---|---|---|
| Connects to | Standard garden hose thread | 1 in PVC (slip) or 1 in poly |
| Best for | 25–50 ft lines on a hose | 100 ft+ lines and multiple zones |
| Regulator | 30 PSI, or without | 30 PSI, or without |
Cutting the 328 ft roll?
Every piece you cut becomes its own run and needs its own Bed Add-On Kit. Three runs, three kits, unless you're reusing fittings.
View Bed Add-On Kit →Commonly purchased together
-
Bed Add-On Kit
One per run of tubing. Starter connector, threaded adapter, filter and end stopper.
$14.50 -
Garden Hose Connector
If you're running off a hose bib. 30 PSI regulator included.
$35.50 -
Mainline Connector
For a 1 in PVC or poly mainline. With or without regulator.
From $55.00Choose -
Tube Coupling
Joins two pieces of R-Wide tubing into one longer run.
$5.65 -
Riser Clamps
Lift the line above taller crops so the spray clears the canopy.
From $5.50Choose
Specs at a glance
- Operating pressure
- 15–30 PSI (30 rated)
- Spray width
- 33 ft at 30 PSI · about 26 ft at 22 PSI
- Spray angle
- 35°
- Flow
- 0.13 GPM per ft of line
- Application rate
- 0.47 in per hour
- Line spacing
- About 26 ft between lines
- Longest single run
- 328 ft at full pressure
- Filtration
- 80 mesh
- Sold as
- 25, 50 and 100 ft lengths, the full 328 ft roll, or short pieces of 15–24 ft
- Made by
- Sumika Agritech, Japan
Rated at 0.20 MPa. Source: Sumika Agritech.
Questions growers ask
Still not sure? Email hello@moderngrower.co or call 877-850-1555.
What's the difference between this and the R-Wide Kit?
This is the tubing on its own. The R-Wide Kit is the same tubing plus the parts to run one line: Tube Starter Connector, 1 in threaded connector, Fabric Filter and End Stopper. Buy tubing only when you already have fittings or you're cutting a roll into extra runs.
What do I need to run the tubing?
One Bed Add-On Kit for each run, plus a Garden Hose Connector or Mainline Connector at your water source. Get the R-Wide version of each part.
How many Bed Add-On Kits do I need?
One per run. If you cut a 328 ft roll into three runs, you need three kits, unless you're reusing fittings from tubing you're replacing.
Will Mark II fittings work on R-Wide tubing?
No. R-Wide and Mark II starter connectors, end stoppers and couplings are made for their own tubing and don't cross over. Riser clamps fit both.
What is a short section?
A single piece of R-Wide tubing between 15 and 24 ft long, at a lower price. The exact length within that range varies. It suits short beds, a greenhouse bench or a trial run.
Can I run R-Wide off a garden hose?
Yes, for shorter lines. A 25 ft line needs about 3.2 GPM, which almost any hose delivers. A 50 ft line needs 6.4 GPM and depends on your hose and pressure. A 100 ft line is at the limit: short 3/4 in hose only. The full 328 ft roll needs a mainline or pump.
Can I run it above 30 PSI?
No. Pressure above 30 PSI can damage the tubing. Both water-source connectors come with a 30 PSI regulator, or add a regulator to your own fittings.
How far apart should I space lines?
About 26 ft at full pressure. The spray narrows at lower pressure, so space lines closer if your pressure runs low.
Main US source
Modern Grower is the main US source for Sumi Soaker (Sumisansui) tubing from Sumika Agritech.
Support from people who use it
Questions go to our team, with a direct line to the manufacturer. hello@moderngrower.co · 877-850-1555
Ships from the US
In stock, with most orders out within 24 hours. Free shipping over $25 in the Lower 48.
About Sumi Soaker R-Wide irrigation tubing
Sumi Soaker R-Wide is overhead irrigation tubing made in Japan by Sumika Agritech and sold in much of the world as Sumisansui. It's a flat polyethylene tube with rows of laser-cut holes. Under pressure it fills and throws fine streams up and out to both sides, covering a strip about 33 ft wide at its rated 30 PSI. One tube in the center path waters eight 30 in beds or six 4 ft beds.
When to buy tubing only
Buy R-Wide tubing on its own to replace a worn or damaged line, add runs to a system you already have, or buy the full 328 ft roll and cut it to your bed lengths. Each run needs its own Bed Add-On Kit (Tube Starter Connector, 1 in threaded connector, Fabric Filter and End Stopper). If you're starting from scratch, the R-Wide Kit includes those parts with the tubing.
Sizing R-Wide to your water
R-Wide uses about 0.13 GPM per foot of line at 30 PSI: roughly 3.2 GPM for 25 ft, 6.4 GPM for 50 ft and 12.7 GPM for 100 ft. Short lines run on a garden hose; longer lines and multiple zones belong on a 1 in mainline. Spray width drops to about 26 ft at 22 PSI, and pressure above 30 PSI can damage the tube, so run it behind a 30 PSI regulator.
R-Wide or Mark II
R-Wide is the wide, low-angle tubing for open field beds. Mark II has a steep 80° spray about 13 ft wide, runs on as little as 3 PSI and suits garden hoses, tunnels and taller crops. Fittings are specific to each tubing.