My irrigation sysyem
Albe
Posts: 135
I'm planning our rain harvesting and irrigation system. Last year I consumed tot. (house + garden) ca 193qm = 200eur of water.
Here some math. The total roof at our property is House 9x9, plus garage 2.5 x 6.5: tot. 16m2 (I'm excluding the shed 2.5x2.5, and the Patio roof, maybe 2x7).
Water data here is summer rain ca 6cm/month, so tot. volume collectable once I set up the downpipe diverters etc. (9x9 + 2.5*6.5)*0.06 = 5.8 qm/month.
Say this 5.8 qm/monthis split into 3 days of rain, 2qm/day, one rain every 10days, so if both 1000l tanks are empty by the time it rains they catch the whole rain.
Say I use this for 4months, so 23qm.
Water is 1.7eur/qm, plus 2.7eur/qm if you don't have a Garden meter. So my system would save me max 23*1.7 = 39eur/yr
Cost of the system: ca 400eur
3 zinc rain diverters: 3 * 23eur
pump: 100eur
2 tanks: tot. 2 x 90eur = 180eur (maybe I'll need more capacity, we'll see...)
tanks connector: 6eur
ignoring timer pipes etc that I would have even without rainharvesting
So a payoff of ca 10yr, provided no mistakes, nothing breaks down, etc etc. all very unlikely of course.
This ignores the enviromental aspect, which is very important to me, and the fun and excitement of planning designing and executing the project, and the feeling of self satisfaction for years to come once is there up and running and I know I made it myself, all extremely valuable.
Any comment?
Posts
Isn't there a way to edit an own post?
Eidt: oh stupid me, found it, you can edit within 1hr ....