Who has experience with cisterns?

Hello Changeling

2,500 euros for the cistern including transport is a good price. But 500 euros for a "Beruhigten Zulauf" is almost theft. The couple of KG pipes and the inlet can’t cost more than 50 euros. I would install the part myself. Take a look online. There are good pictures showing how something like that is done.

Steven

Hi , sorry for the confusion. By "Preis vollmachen" I meant reaching 2500€; the surcharge for the inflow is 115€. This is the size difference between the "Garten" and "Black" versions of the rain collectors (price is visible on the homepage).

Then I would take the version with the regulated inflow and connect the overflow to a (how long?) drainage pipe that I will lay in the garden. This way I save on the entire rainfall fees. Thank you!

Something different again. Can you recommend a pressure-controlled submersible pump with float?

Hi , sorry for the confusion. By "filling the price" I meant reaching 2500€; the surcharge for the inlet is 115€. This is the difference in size between the "Garden" and "Black" versions of the rain collectors (price can be seen on the homepage).

Then I would take the version with the calmed inlet and connect the overflow to a (how long?) drainage pipe that I will lay in the garden. That way I save the entire rainfall fees. Thank you!

Two years ago I ordered a cistern from the rain collectors. The entire ordering process, delivery, contact person, etc. was very good; what was not good was the slot filter.

Based on the information on the homepage, I assume that the filter is the same one installed at my place. Closely spaced metal rods, slanting, which according to the promotional video are supposed to clean themselves. The spacing is so small and the mode of operation only understandable under laboratory conditions and a constant water flow.

In short, the filter is really rubbish; it even clogs up with pollen and then causes all the rainwater to simply flow on and end up in the sewer. Because as soon as the water flow stops due to no rain, dirt settles in the groove and the water slowly seeps through while the dirt sticks and crusts nicely onto the filter rods.

I have now removed the filter and simply let the water flow into the cistern through the calmed inlet. Only on the gutters I installed grids so that coarse leaves, as well as mice or similar creatures, do not get in.

If I were to do it again, I would choose the simplest filter version or none at all, but rather the largest possible volume. A certain amount of dirt/sludge in a cistern is even advantageous since microorganisms live there that improve water quality. Of course, this only applies if the water is used exclusively for the garden. In my opinion, a cistern can never be dimensioned too large because in the worst case the water simply doesn’t overflow. If fresh water does not flow in due to lack of rainfall and thus oxygen is missing, this also applies to smaller cisterns. There are some users online who have then made do with an aquarium pump and used it to pump air into the cistern so that the water does not go bad. As a pump, I use the submersible pressure pump GARDENA 6000/5 automatic, which has been in the cistern all year round (now for two winters) and with which I am very satisfied. It automatically turns on when water is drawn (pressure drop in the line) and turns off again at the end of the withdrawal.

So, the cistern project is completed. In the end, it became a 9100-liter cistern, the Blue model from Regensammlern with filter basket and stabilized inlet. Based on the experience of , I will keep a close eye on the filter. The Regensammler are simply a cistern intermediary: We got a brand-name cistern from Mall! And even cheaper than directly at Mall (€2005 including delivery). Even the local concrete plant couldn't compete with the prices. We buy the pump separately, since it is significantly more expensive at Regensammlern than in the regular online trade. It will cost around €300, but that will be a good model (not decided yet). For the pit, we paid another €2000 (including sand filling and partly hauling away the excavation) and had a soakaway trench dug by the excavator. We filled the trench with 30m drainage pipe (hardware store, €60), 16 tons of drainage gravel (16/32, €400 including delivery) and corresponding fleece around it (€70). Overall, the project turned out to be quite expensive and will only pay off after 15-20 years, depending on how the rainfall fees develop. But for that, we have the small luxury of a probably always full water tank, and looking ahead to ever warmer and drier summers, we are quite glad we did it.

Can you by now provide a little experience report about your Mall cistern?

I am currently in the discovery phase and completely overwhelmed. It will be a Mall cistern because my excavation contractor simply gets very good prices there (compared to the online price). But the filter topic is driving me crazy... We only want to irrigate the garden with it, so no domestic water system.

Now there are 4 different types of filtration for a concrete cistern. Unfortunately, the catalog from Mall describes it inadequately for me, I will list them:

1. The simplest and cheapest variant.


2. A simple filter (1.0mm fine).


3. With slot sieve filter (0.8mm fine)


4. With filter basket (0.4mm fine)


And another screenshot for comparison:


But one keeps reading that the simplest variant actually has the advantage of bringing oxygen into the water. So why are all the other filters top drip-fed and also more expensive?

Can someone shed some light on this?

The advantage I see in the filter basket is that the inspection interval is supposed to be twice as long and since I am not getting any younger, maybe that's advisable.

I would be grateful to all of you for advice and experiences.

(It should be mentioned that the pictures show retention cisterns because we have to do that, but it is completely analogous to normal cisterns in terms of filtration and price scaling.)

Regards