Dimension Cistern - Building Plan Tips

Just to clarify, we needed about 30m³ of water last year for a similarly sized garden (very dry). With approximately €6 water + sewage costs (unless you can get exempted from sewage charges), that results in monthly costs of €15. If you have to finance the €4200 at about 1.5%, then the cistern pays off earliest after 29 years. (Provided the cistern never runs empty in those 29 years.) Considering electricity costs for the pump, possible repairs, etc., the payback period would quickly be around 35-40 years.

For someone who doesn’t necessarily have to build a cistern, it probably will never be worthwhile.

Furthermore, it must also be noted that some AZVs charge a precipitation fee even when the cistern is connected to the sewer (overflow).[ /QUOTE]

Like with us. I was once told that due to the overflow, the cistern is not taken into account at all. That probably means that no flat-rate deduction is made either (e.g. there is a cistern – then we deduct 20% of the precipitation volume).

[QUOTE="bierkuh83, post: 141570, member: 26521"]Everyone has to make the calculation for themselves because every AZV has different deductions for discharged precipitation water. The trend here is also rather increasing (deductions). So I would definitely equip the amortization calculation with a capitalization for the fees...