Drip Irrigation Installation Guide: Step-by-Step for Raised Beds

A properly installed drip system on 30 raised beds can be completed in 2 days by 2 people with basic tools. The investment in doing it correctly once — proper filter, correct pipe sizing, adequate pressure, and tested emitters before mulching — saves weeks of troubleshooting blocked emitters, uneven irrigation, and crop stress over the system’s 7–10 year life. The most common installation mistake: laying pipes before testing pressure and emitter function, then burying problems under mulch. Test everything before mulching, and fix all leaks and blocked emitters before the first crop goes in.

What Tools and Materials Do You Need?

Tools:

• Pipe cutter or hacksaw (for PVC mainline)
• Compression fitting tool (for LLDPE laterals — push-fit connectors)
• Hole punch / goof tool (3–5mm for take-off connectors into mainline or submain)
• Measuring tape and string line
• Pressure gauge (to verify operating pressure — ₹200–500)
• Teflon tape (for threaded connections)

Materials for 30 beds (4ft × 30ft each):

• Mainline (75mm PVC, Class 4): 50–80 metres
• Submain (40mm LLDPE): 80–120 metres (distribution headers)
• Laterals (16mm LLDPE): 60 laterals × 9.5 metres = 570 metres
• Inline drippers (2 l/hr): 60 laterals × 30 emitters = 1,800 emitters
• Take-off connectors (16mm × submain): 60 pieces
• End caps (16mm): 60 pieces
• Ball valves (zone control): 3 (one per zone of 10 beds)
• Filter unit (sand + screen): 1
• Pressure gauge fitting: 1

What Is the Step-by-Step Installation Process?

Phase 1 — Plan on paper before cutting any pipe

1. Sketch your bed layout to scale — show all 30 beds, main paths, pump location
2. Mark the mainline route from pump to the far end of the farm
3. Mark submain positions (one per zone, running perpendicular to beds)
4. Mark lateral positions (2 per bed)
5. Calculate all pipe lengths — add 10% for errors and fittings

Phase 2 — Install the pump and filtration

1. Secure the pump (submersible in borewell/pond, or surface centrifugal)
2. Install the filter unit at the pump outlet — always: sand filter first, then screen filter
3. Fit the pressure gauge after the filter unit
4. Run the pump without the field system connected; measure pressure — must be minimum 1.5 kg/cm²

Phase 3 — Lay the mainline

1. Run PVC mainline from the pump to the far end of the field
2. Bury mainline 20–30 cm underground or lay on the ground surface and cover with soil
3. Install ball valves at each zone take-off point
4. Install end cap at the mainline far end

Phase 4 — Lay submains

1. Submains run perpendicular to beds (across the farm width)
2. Connect submain to mainline via a ball valve and take-off connector
3. Lay submain along the main path between zone groups
4. Cap the far end

Phase 5 — Install laterals

1. Using the hole punch, make a hole in the submain at each lateral take-off point
2. Insert take-off connector (barbed fitting) into the hole
3. Connect 16mm lateral to the take-off connector
4. Lay the lateral along the bed length — 40 cm from each bed edge for a 4-foot bed
5. Install end cap at the far end of each lateral
6. The inline drippers are already embedded in the lateral during manufacturing (for inline drip tape) — or push in separately for separate emitters

Phase 6 — Test before mulching

1. Open all zone valves one at a time
2. Run the system for 20 minutes per zone
3. Walk every lateral — check for: dripping from connections (tighten), emitters not flowing (replace or clean), pressure at far end of lateral (low pressure = blockage somewhere)
4. Place a container under 5–10 random emitters for 30 minutes — all should collect approximately the same volume
5. Fix ALL problems found before closing up

Phase 7 — Mulch and plant

Only after full system testing passes: apply mulch. Pull back mulch at each emitter location so you can access emitters for future cleaning.