ᐅ Water supply line for backflow replenishment and irrigation

Created on: 31 Aug 2022 15:41
D
DASI90
Hello everyone,

We have decided to install a pool and want an automatic water refill system as well. This means we need water supply in our outdoor storage area, where the pool equipment and irrigation control will be located. Of course, we didn’t consider this during planning and construction, as the desire for a pool and automatic irrigation came much later. Anyway.

The outdoor storage is part of the house but is outside the thermal envelope and has no direct access from the house. Now the question is how to get the water connection into the outdoor storage. We would definitely install a backflow preventer. There are basically two options:

1) The pool installer suggested running an additional cold water line from the utility room on the opposite side of the house into the outdoor storage. We could tap off from there. However, this would require a core drill through the concrete wall and insulation, which I would prefer to avoid. The pool installer says this would pose no problem if the drill hole is properly foamed/sealed afterwards. So neither thermal nor sound insulation should be affected, especially since the outdoor storage already has a door and is otherwise tight.

2) I’ve only recently considered this option. We already have a frost-free outdoor faucet at the front. Would it theoretically be possible to modify this faucet or run a line from it through the garden and the front, uninsulated wall of the outdoor storage to supply the equipment? Or is this not advisable or feasible for some reason? The missing outdoor faucet could potentially be replaced by a water outlet if this works out.

Technical floor plan: Outdoor storage, utility room, cold water line, pool equipment; frost-free outdoor faucet.


What do the experts say? Is the solution with the additional line harmless and cleaner? Or am I risking creating a hole that wouldn’t be necessary otherwise?

Best regards
rick20184 Nov 2022 02:04
I don’t have a flat tank, but I suspect the bottom is not completely level.
What kind of pump do you have now? A floating suction?
You can also hang the pump on a rope or chain to keep it upright.
Pumping directly from the bottom is not ideal anyway, as you might draw sediments into your water system…
DASI904 Nov 2022 13:47
Yes, it is the DAB40/50 Pulsar Dry with a floating suction. An employee from Graf said I have to operate it outside the tank. Of course, that is not possible. But if I hang the pump on a rope, that would work, right?
rick20184 Nov 2022 14:46
Yes, using a rope works without any problems. It is a submersible pump. You cannot install it outside of water anyway.
DASI906 Nov 2022 08:34
Now I first need to figure out how to get a submersible pump into the cistern anyway. The installation sleeve for the inflow is in the way, and I don’t see any way to remove it once the PVC pipes are connected.

Innenseite eines Rohrs mit rotem Deckel, zentralem Loch und orangefarbenen Verschlusselementen.
rick20186 Nov 2022 11:05
Remove the expansion tank, install the pump, then put the expansion tank back in. You can also just drill another hole in the pressure pipe.
DASI906 Nov 2022 11:27
Yes, that was the plan. So, I will drill the pressure pipes precisely out of the dome. But there are two pipes connected to the red vessel. How am I supposed to remove the vessel if two pipes are connected?