Lapeta pipe for paddy: sizes, grades and pitfalls

Lapeta pipe for paddy is a conveyance decision, not an irrigation-method one: the crop floods, and the pipe's only job is moving bore water across the bunds without losing it on the way. This guide covers the lapeta pipe grades we stock for paddy, the bore sizes that actually get used, real roll prices, and the short list of mistakes that finish a roll in one season.

Why paddy buys lapeta, not drip

A lapeta roll replaces the channel. Carry it flat on a shoulder, unroll it from the delivery pipe to whichever plot is drinking today, pump through it, and roll it back up when the turn ends. The same roll waters the nursery in the seedbed weeks, when a small area needs water placed exactly and an open channel drowns half the path getting there.

Transplanted paddy stands in ponded water, and we have said plainly before that drip has no honest role in that main field. What paddy loses water to is the journey. An unlined earthen channel soaks, seeps and overtops, and studies of field-channel losses put the waste at a quarter or more of what the pump lifts — water paid for in diesel or in a power window, gone before the first bund.

Which lapeta pipe for paddy: the grades

The counter word "lapeta" covers four different walls. What changes between them is material and weight, and therefore price and life:

One disambiguation matters at billing time. The 63 to 90 mm R-FLEX lay flat subline in our drip range is a different product — a sub-main for micro-irrigation taxed at 5% — while conveyance lapeta is general goods at 18%. Both rates are inside the printed MRP; do not expect one pipe's rate on the other.

• **Tarpaulin white, 3 to 6 inch.** Woven virgin tarpaulin, the traditional big-bore roll. The only family that goes past 4 inch, so canal outlets and large diesel pumps end up here by default.
• **Plain LDPE, 3 and 4 inch.** The standard black roll: a single extruded film wall, tougher against dragging. It is sold by weight, and [the kilogram arithmetic](/blog/ldpe-coils-sold-by-weight) is the honest way to compare rolls.
• **Double layer and premium black, 3 inch.** Same bore, different wall budgets. Do the grams-per-metre sum: the plain 15 kg roll spreads 15 kg over 90 metres, about 167 g per metre, while premium black spreads 10 kg over the same 90, about 111 g. Lighter wall, lower price — decide with the number, not the name.
• **Matty yellow, 3 and 4 inch.** The budget line, in 45 to 120 metre rolls.

Sizes: match the pump outlet, not the price list

For the 3 to 5 HP borewells that water most paddy in Telangana and Andhra, 3 inch is the working default — it mates with the common delivery outlets and carries their flow without choking it. Move to 4 inch when the run is long or the engine is bigger; a bore too narrow for the pump throttles it, and the pump pays in load what the buyer saved on the roll.

The 5 and 6 inch tarpaulin rolls belong to shared water: a canal outlet, a big diesel pump, one roll walked plot to plot through a village turn system. If the pipe must mate with fittings, order by the millimetre and inch marked on the product page, not by eye.

What a roll costs

Notice the shape of the list: within a grade, the per-metre rate barely moves with roll length, so buy the length the run actually needs rather than a "value" roll that spends its extra metres folded in the shed.

Prices below are our MRP, tax inside, from the lapeta and LDPE listings:

• Plain LDPE 3 inch: ₹720 for 30 m up to ₹4,320 for 180 m; the 90 m mid-roll is ₹2,160.
• Plain LDPE 4 inch: ₹2,160 for 65 m, ₹3,600 for 108 m.
• Double layer 3 inch: ₹1,980 for 70 m, ₹2,970 for 105 m. Premium black: ₹1,980 for 90 m, ₹2,970 for 135 m.
• Matty yellow 3 inch: ₹1,170 for 45 m up to ₹3,150 for 120 m.
• Tarpaulin 3 inch: ₹2,610 for 60 m up to ₹6,525 for 150 m — ₹43.50 a metre at every length.
• Tarpaulin 4 inch: ₹6,336 for 120 m, ₹7,920 for 150 m. Five inch: ₹7,245 and ₹8,991. Six inch: ₹8,100 for 120 m, ₹10,125 for 150 m.

The pitfalls that finish a roll early

Paddy is the hardest posting a lapeta roll can get, and almost every early death is one of these:

• **Stubble.** Harvested paddy ground is a bed of spikes. Drag the roll along the bund and unroll into the plot; never haul a filled pipe across stubble.
• **One fold, one crease.** Folding at the same point every time cracks the wall there in a season. Roll it up instead, and start the roll from alternating ends.
• **Throttling.** Lapeta is conveyance, not pressure pipe. Choking the outlet to push water further, or teeing a sprinkler onto it, bursts seams the wall was never rated for.
• **Sun between turns.** A roll left filled and baking on a bund ages fastest. Drain it, roll it, and [store it out of the sun](/blog/making-your-pipe-last) between waterings.
• **The shed itself.** Rats chew stored rolls. Hang the roll off the floor rather than leaving it in a corner through the off-season.

Buying it right

Settle three things before ordering: the pump's outlet size, the longest run in metres from delivery pipe to the farthest plot, and whether the roll will be dragged over stubble — that last answer decides tarpaulin versus LDPE more than price does. Time the purchase to the nursery, not the transplanting: the seedbed weeks are when a new roll earns its keep first, and a roll bought at puddling arrives after the hardest watering is already done. The paddy crop page keeps the agronomy beside the parts.

If the field is odd-shaped, the runs are long, or one roll must serve several plots in rotation, send the measurements and we will size the bore and length against your pump before anything ships.