ᐅ Water supply line for backflow replenishment and irrigation

Created on: 31 Aug 2022 15:41
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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
C
Costruttrice
14 Oct 2022 18:28
In our case, the two holes for the brine pipes are 10–20cm (4–8 inches) apart, with the multi-service connection about 100cm (39 inches) away from them.
DASI9015 Oct 2022 10:01
I have been struggling to figure out how to get another cable out and forgot that we still have an entire section free at the multi-utility connection, which was planned as a reserve, for example, for cable TV. Is it possible to connect from there?
rick201815 Oct 2022 10:04
Sure, as long as the diameter is suitable. You just need to ask the electrician what type of cable is required. I would guess something like 5x6.
DASI9015 Oct 2022 10:13
There are different cable diameters in this category. In my opinion, that should work. I was just not sure whether the "entry point" can also be used as an exit. From outside, the landscaping contractor should be able to work on it with excavators and shovels, or are the supply lines, which are also involved, exclusively under the control of the utility providers?
rick201815 Oct 2022 10:15
You or your contractor may of course dig. It is your house and property. If anything gets damaged, you are also responsible.
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borderpuschl
17 Oct 2022 12:33
I would prefer to dig separately and rather do another core drilling. You can then do it exactly where it fits best. The risk of digging into existing pipes and then properly compacting the ground again to prevent any damage during settling would be too high for me. This way, you can also route all supply lines into your utility shaft there.