3.3 Irrigation Systems

Works by hand; main supply and connection to laterals; excavate trench for main or ring main 450mm deep; supply and lay pipe; backfill and lightly compact trench

20mm LDPE 100m 1625.00 16mm LDPE 100m 1600.00

Turf area irrigation; laterals to mains; to cultivated soil; excavate trench 150mm deep using hoe or mattock; lay moisture leaking pipe laid 150mm below ground at centres of 350mm

low leak 100m² 500.00 high leak 100m² 465.00

Landscape area irrigation; laterals to mains; moisture leaking pipe laid to the surface of irrigated areas at 600mm centres

low leak 100m² 245.00 high leak 100m² 220.00

Landscape area irrigation; laterals to mains; moisture leaking pipe laid to the surface of irrigated areas at 900mm centres

low leak 100m² 165.00 high leak 100m² 150.00 multistation controller each 410.00 solenoid valves connected to automatic controller each 610.00

£ Excluding site overheads and profit

RAINWATER HARVESTING

Rainwater Harvesting Ltd; rainwater tanks; soft landscape areas installed below ground Excavate in soft landscape area by machine to install rainwater harvesting tank; grade base and lay compacted granular base to level; connect filters to rainwater down pipe of building 10m distance and lay 110mm uPVC pipe in trench. Install rainwater tank complete with filters for irrigation and submersible pump; cover with geofabric and backfill with excavated material compacting lightly; remove surplus material off site

3700 litre nr 3700.00 4500 litre nr 3850.00 6500 litre nr 4600.00 9000 litre nr 5600.00 13000 litre; 2 nr 6500 tanks nr 7300.00

Excavate in soft landscape area by hand to install rainwater harvesting tank; grade base and lay compacted granular base to level; connect filters to rainwater down pipe of building 10m distance and lay 110mm uPVC pipe in trench. Install low profile rainwater tank complete with filters for irrigation and submersible pump; cover with geofabric and backfill with excavated material compacting lightly; remove surplus material off site

Flat tank 1500 litre nr 3900.00 Flat tank 3000 litre nr 5300.00