| # | Code | Description | Unit | Qty | Rate (₹) | Amount (₹) |
|---|---|---|---|---|---|---|
| 1 | 2.8.1 | ExcavationEarth work in excavation by mechanical means (Hydraulic excavator) / manual means in foundation trenches or drains (not exceeding 1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, for all lift, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m. — All kinds of soil. | Cum | 1,087.50 | 260.30 | 2,83,076.25 |
| 2 | BW.SANDBED | Sand BeddingSand bedding for pipes. | m³ | 112.50 | 640.00 | 72,000.00 |
| 3 | DI.PIPE.K9 | Di Pipe SupplyDI K9 150 mm pipe (MJP SSR rate). | m | 1,000.00 | 1,919.00 | 19,19,000.00 |
| 4 | DI.JOINT.RUB | Pipe JointingDI rubber-gasket joint per joint. | Each | 167.00 | 450.00 | 75,150.00 |
| 5 | DI.AIR.VALVE | Air ValveAir valve double-ball 80 mm + chamber. | Each | 4.00 | 28,000.00 | 1,12,000.00 |
| 6 | DI.SLUICE.VL | Sluice ValveSluice valve 150 mm + chamber. | Each | 2.00 | 42,000.00 | 84,000.00 |
| 7 | DI.BEND.SET | Bends SetDI bend + thrust block. | Each | 8.00 | 5,500.00 | 44,000.00 |
| 8 | 5.3 | Thrust Blocks RccReinforced cement concrete work in beams, suspended floors, roofs having slope up to 15° landings, balconies, shelves, chajjas, lintels, bands, plain window sills, staircases and spiral stair cases above plinth level up to floor five level, excluding the cost of centering, shuttering, finishing and reinforcement with 1:1.5:3 (1 cement : 1.5 coarse sand(zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources). | Cum | 2.40 | 11,505.50 | 27,613.20 |
| 9 | 5.22.6 | Thrust Block SteelSteel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. — Thermo-Mechanically Treated bars of grade Fe-500D or more. | Kg | 192.00 | 107.85 | 20,707.20 |
| 10 | 2.25 | BackfillFilling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 and for all lift. | Cum | 957.33 | 196.00 | 1,87,636.68 |
| 11 | DI.HYDROTEST | Hydraulic TestHydraulic test per metre. | m | 1,000.00 | 18.00 | 18,000.00 |
| Your inputsPipeline length 1 km · Pipe int. ⌀ 150 mm · Pipe pressure class K9 · Pipe cover depth 1 m · Air valves 4 · Sluice valves 2 · Bends 8 | TOTAL | ₹28,43,183 | ||||
- Rates sourced from MJP SSR 2023-24 (with 2024-25 escalation column). 5 corrigenda dated up to 20-Dec-2024 exist (mjp.maharashtra.gov.in publications page) but are scanned-image PDFs in Marathi requiring manual review for tender-grade use. For cost feasibility this Builder is good as-is; for tender submission, cross-check each item against the latest corrigendum.
- DI pipe class selection: K7 for gravity mains (< 25 m head); K9 is the universal standard for pumping mains (≤ 40 m head, covers most JJM applications); K12 only for high-head pumping mains > 40 m head.
- Pipe diameter: 80-100 mm for small village schemes (5-15 lps), 150-200 mm for typical JJM (15-50 lps), 250-400 mm for cluster schemes + small municipalities, 500-600 mm for major mains.
- Cover depth 1.0 m is the CPHEEO + IS 12288 standard for cross-country pumping mains. Bump to 1.2 m under cultivated land (plough depth protection), 1.5 m under road crossings.
- Air valves at all high points + change of slope (about 1 per 250 m typically). Sluice valves every 500 m + at every off-take. The Builder defaults are conservative — adjust per detailed routing.
- Thrust blocks at every horizontal bend > 11° and vertical bend > 11°. Size = max(0.3 m³, pipe_dia² × 2 m³) per IS 14846 + CPHEEO. Calculation captures this rule.
- Sand bedding 150 mm below pipe + side-fill up to 300 mm above crown is mandatory per IS 12288 — prevents pipe damage from rock-fill, distributes loads evenly.
- Hydraulic test pressure = 1.5× working pressure or maximum static head + 5 bar, whichever greater. Tested in 500 m stretches; no leakage > 1.5 L per mm dia per km per 24 hr.
- PHED rates for DI pipe vary HUGELY by state — Tamil Nadu TWAD 150 mm K9 DI: ₹650-850/m; UP Jal Nigam: ₹500-700/m; Maharashtra MJP: ₹700-900/m. Always verify with local PHED schedule.
- Excludes: pipe carriage from manufacturer to site (significant for remote sites — ₹40-80/m for 200+ km); de-watering during excavation in waterlogged sections; rock excavation (swap 2.8.1 for 2.9.1 / 2.9.2); river / nallah crossings (encased steel pipe in RCC casing — separate quote); cathodic protection in salt-spray coastal areas; thrust ring + flange adaptors at pump house tie-in.
**Ductile Iron (DI) pumping mains** are the standard pipe material for water-supply pumping mains in India — every JJM Village Water Supply, every state PHED scheme uses DI K9 for pipe sizes 100-600 mm. Per **IS 8329 + IS 12288 + CPHEEO Manual** standard configuration: trench excavation + 150 mm sand bedding + DI pipe (per IS 8329 dimensions, IS 12288 laying practice) + rubber-gasket / tyton jointing + thrust blocks at bends + air valves at high points + sluice valves at off-takes + hydraulic test. This Builder generates the complete cost per km for any diameter (80-600 mm), pressure class (K7 / K9 / K12), and ancillary count combination — civil from CPWD DSR + pipe/valves from state PHED placeholder rates (verify locally).
DI vs HDPE vs PVC vs CI — which to use when
**DI (Ductile Iron)** — the workhorse for pumping mains 100-1200 mm + medium-high pressure (≤ 50 m head). Strong, durable (60-80 yr life), good corrosion resistance with internal cement-mortar lining + external zinc coating. Higher cost than PVC/HDPE; standard for permanent installations. **HDPE (PE-100)** — flexible plastic, joinable by butt-welding, sizes 20-1000 mm. Cheaper than DI; excellent for distribution networks + buried mains. Pressure rating PN-6 to PN-16. **PVC (uPVC)** — cheapest, sizes 20-400 mm, only for low-pressure distribution. **CI (Cast Iron)** — legacy material, brittle, hardly used in new work. **Selection rule of thumb**: pumping main 100-600 mm + permanent infra → DI K9. Distribution > 50 mm → HDPE PN-6 or PN-10. House service connection < 50 mm → uPVC or HDPE.
Construction sequence
(1) Survey + alignment + marking. (2) Excavate trench full-length to design depth + width. (3) Lay 150 mm sand bedding, levelled to design grade. (4) Pipe stringing along trench. (5) Lay pipes one-by-one + insert rubber gasket joint + push home with chain-block. (6) Cast thrust blocks at bends (RCC M20, 24-hour curing before backfill). (7) Install air valves at high points (RCC valve chamber + valve + by-pass). (8) Install sluice valves at off-takes (RCC chamber + manhole cover). (9) Backfill in 200 mm lifts up to 300 mm above pipe crown; watered + tamped. (10) Continue backfill to full depth. (11) Reinstate surface (road / footpath repair). (12) Hydraulic test in 500 m stretches. (13) Disinfection + flushing. (14) Connection to pump house + OHSR.