Sumi Soaker R-Wide Kit — Overhead Irrigation System
5.0 out of 5 · 3 reviewsOverhead mist irrigation for wide beds. R-Wide lays down a 33 ft rectangle of gentle spray from a single line, sized for market gardens running eight 30 in beds or six 4 ft beds per line.
- 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.
- Gentle, rain-like water. About 0.47 in per hour in fine streams that won't wash out seed or crust the bed.
- 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's in the kit
One roll of R-Wide tubing plus the parts to run it: Tube Starter Connector, 1 in threaded connector (adapts the starter's G1 parallel threads to standard NPT), Fabric Filter and End Stopper. Add a Garden Hose Connector or Mainline Connector to hook up to your water.
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.
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
- 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
- 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? |
|---|---|---|
| 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 |
Do you have everything you need?
The kit covers everything on the tubing side. You add one connector for your water source.
-
roll -
Feeds water into the tube -
Adapts G1 parallel threads to NPT -
Catches grit before it reaches the tube -
Closes the far end
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, included | 30 PSI, included |
Cutting into multiple runs?
Each run needs its own starter connector, filter and end stopper. Add one Add-on Kit for each extra run.
| Runs | Add-on Kits |
|---|---|
| 1 (no cuts) | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
Commonly purchased together
-
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 -
Add-on Kit
For each additional run beyond the first.
$14.50 -
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
- 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.
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.
Why isn't a pressure regulator in the kit?
The regulator comes with the water-source connector, so you only buy the one that matches your setup. Both the Garden Hose Connector and the Mainline Connector include a 30 PSI regulator.
Can I run it above 30 PSI?
No. Pressure above 30 PSI can damage the tubing. Use a connector with the 30 PSI regulator, or add a regulator to your own fittings.
How many Add-on Kits do I need for the 328 ft roll?
Count your runs and subtract one. Three runs need two Add-on Kits.
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.
Do I need risers?
Not for low crops. Once plants grow tall enough to block the spray, riser clamps lift the line above them.
What filter do I need?
80 mesh. The kit includes a fabric filter. Add upstream filtration if you're on a well, pond or river with sediment.
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 overhead irrigation tubing
Sumi Soaker R-Wide is overhead irrigation tubing made in Japan by Sumika Agritech, sold in Japan and much of the world as Sumisansui. A flat polyethylene tube with rows of laser-cut holes, it fills under pressure and throws fine streams up and out to both sides. At its rated 30 PSI, one line covers a strip about 33 ft wide, so a single tube laid in the center path waters eight 30 in market garden beds or six 4 ft beds at once.
Why growers switch from sprinklers and wobblers
Wobblers and impact sprinklers water in circles. Bed blocks are rectangles, so circular heads leave dry corners, double-water the overlaps and soak the paths. Sumi Soaker's spray lands as a rectangle that matches the block, at about 0.47 in per hour. That rate is gentle enough for direct-seeded carrots, salad mix and other small seed, and steady enough to establish transplants without crusting the bed.
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 fine on a garden hose. Longer lines and multiple zones belong on a 1 in mainline. Pressure matters too: spray width drops to about 26 ft at 22 PSI, and pressure above 30 PSI can damage the tube, which is why both water-source connectors include a 30 PSI regulator.
R-Wide or Mark II
R-Wide is the wide, low-angle tubing for open field production. Mark II is its low-pressure sibling, with a steep 80° spray about 13 ft wide that runs on as little as 3 PSI and suits garden hoses, small wells, tunnels and taller crops.
Setup and care
Kits come cut to length with the starter connector, threaded adapter, fabric filter and end stopper, and the full 328 ft roll can be cut into shorter runs with one Add-on Kit per extra run. Fittings hand-tighten, a 100 ft roll weighs under 5 lb, and with 80 mesh filtration and seasonal storage the tubing gives years of service.