Water pipeline for water backfeeding and irrigation

Thank you for the assessment. What distinguishes the Premium from Expert? How can one practically imagine that?

Experts are better connectors, sometimes easier to install, for sprinklers upgrading from metal…

With us, the landscape gardener would install the 10,000 l version. Don't you find that too expensive? So just under €10,000 including installation, connection, etc.?

We received an offer from the landscape gardener 2 weeks ago for the Graf cistern XL Premium (10,000l) including truck-accessible dome shaft and other accessories, delivery, installation including excavation, connection for €23,000.

We have now ordered the cistern including accessories ourselves, which alone already cost around €5,600. We are organizing the installation ourselves. For €10,000 we would have had it done.

Ok. Thanks for the feedback. That sounds like our price is really quite fair.

Take the middle level. It is sufficiently durable.

For the cistern pump, I have the choice between one that achieves 1.9 m³/h at 3.5 bar and one that achieves 3.5 m³/h. The latter is twice as expensive at 1000€. The one with 1.9 m³ is actually sufficient. Does the higher performance bring me any advantages?

1.9 is way too low. Take a look at the pump curve. That's at 0 meters and without pressure. 3.5 is okay. But check out at high flow under Tipp Tiefbrunnenpumpe AJ 4 Plus 100/57 AUT ;) 424.37 euros. 6m3/h and 5.7 bar with control. That is optimal for a normal garden. This way you can also cover larger areas, compensate for line losses, and save watering and pump running time.