ᐅ Garden Irrigation Using Rainwater Harvested from Cisterns

Hello everyone!

We are currently building a new house (the foundation pit has just been excavated). We already have two concrete monolithic cisterns of 7000 liters (about 1850 gallons) each on the property and plan to use this water later for garden irrigation (the washing machine and toilets will not be connected to the cistern water). I have a few questions regarding this.

(1) What options are possible?
- Domestic water system or pressure booster with a suction pump in the utility room
- Automatic submersible pressure pump hanging inside the cistern, with electrical connection from the utility room to the cistern
- Garden pump from a hardware store

(2) What are the advantages and disadvantages of each option?

(3) What are the costs of each option?

(4) What is the additional cost for an automatic garden irrigation system for a 150 m² (1600 sq ft) garden?

Best regards

jx7

150 m² (1,615 ft²) garden? The cisterns' capacity is supposed to irrigate 150 m² (1,615 ft²)???

Sorry, the garden is 200 m² (2,153 sq ft) in size.

Then 14,000 liters (3,700 gallons) are rather tight...

I have a submersible pump with a faucet on the wall, and it works without any problems.

We couldn't choose the size of the cisterns; they were predetermined...

How much did the submersible pump cost? Which brand/model is it?

Gardena 6000/5, EUR 300.-