500 Acres · Tea Estate · Since 2018 · Guwahati, Assam · 2nd Project Underway
In 2018, a large-area irrigation enquiry from a tea estate in Assam, North East India came through our website. We immediately planned a site visit to Guwahati, Assam — roughly 4,400 km away from our Palani base. During the field visit, we found an old-type sprinkler system already in place: a 60HP pumpset feeding a 6-inch main HDPE pipeline for water sprinkler distribution. We found that due to low pressure operation and heavy frictional losses, the system was not functioning properly. The estate's demand was clear: an economic RainGun system, without changing their existing 6-inch pipelines.
We designed an advanced high-pressure RainGun system built around our own-make 20HP high-pressure multistage submersible pumpset — replacing the estate's old 60HP pumpset entirely, while reusing their existing 6-inch pipeline infrastructure as-is. The system now runs perfectly with 8 RainGuns, each covering a 65-foot radius.
The customer was happy with our technology upgrade — going from a failing 60HP setup to a smoothly running 20HP system — and is now continuing their 2nd project with us after 6 years.
Project at a Glance (Since 2018)
| Project | RainGun System for Tea Estate Crops |
| Total Area | 500 Acres |
| Existing System (Replaced) | Old sprinkler system — 60HP pumpset, 6" HDPE main pipeline |
| Problem | Low pressure operation and heavy frictional losses — system underperforming |
| New Main Pumpset | 20 HP — High-Pressure Multistage Submersible (Thumba's own make) — 1 No. |
| Additional Pumpsets | 10 HP — 3 Nos. |
| Main Line | 6 inches, up to 1000 meters (existing pipeline reused) |
| RainGuns Installed | 8 Nos. |
| Coverage Radius | 65 feet per RainGun |
| Water Source | Borewell + Water Tank |
| Crop | Tea Estate |
| Location | Guwahati, Assam |
| Customer Since | 2018 |
| Repeat Business | 2nd project underway after 6 years |
"A 60HP pump that still can't hold pressure over distance is a design problem, not a power problem. Once we saw the existing 6-inch line and the frictional losses on-site, we knew a properly engineered 20HP multistage submersible would outperform it — without touching a single length of pipe. That is exactly what happened, and it's why this estate came back to us for a second project six years later."
— Nallamuthu, CEO, Thumba Agro Technologies — from customer project records
The estate's old sprinkler system used a standard 60HP pumpset that still suffered from low pressure and heavy frictional losses through the 6-inch main pipeline. Thumba designed a custom 20HP high-pressure multistage submersible pumpset — built in-house — which develops far more usable pressure per horsepower than the old standard pump. The result was better system performance at a third of the motor power, plus a major reduction in running cost.
Yes, when the pipeline itself is adequately sized. For this estate, the existing 6-inch HDPE main line (up to 1000 meters) was reused as-is. The fix was on the pump side — our high-pressure multistage submersible pumpset was engineered to deliver correct pressure and discharge through that same pipeline, avoiding the cost and disruption of a full pipeline replacement.
The original system operated at low pressure and suffered significant frictional losses inside the pipeline, meaning the sprinklers at the far end of the line were not receiving adequate water pressure. This is a common failure mode in large estate irrigation networks when the pump is not correctly matched to pipeline length and elevation.
Our team travelled to Guwahati, Assam — roughly 4,400 km from our Palani base — to conduct a direct field study before designing this system. For a 500-acre estate with a failing existing system, an accurate on-site assessment of pipeline length, elevation and pressure loss was essential to designing a pumpset that would actually solve the problem, rather than guessing at specifications remotely.
For this estate, 8 RainGuns were installed, each covering a 65-foot radius, supplied by the new 20HP main pumpset plus 3 additional 10HP pumpsets for zone coverage. The exact number and radius required depends on estate layout, elevation and available pipeline pressure — determined through our field study process.
Yes. The customer was satisfied with the technology upgrade and is continuing with their 2nd project with Thumba after 6 years — a direct result of the first system running reliably since 2018.
We'll travel to your site, study your existing pipeline, and engineer the right pumpset — often without needing to replace what you already have.
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