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
DASI9014 Oct 2022 14:25
Brass angle valve on pipe with black handle; thread with sealing tape visible.


We have two such sealed core drillings. Is it a bad idea to run another cable through here with an additional seal? Especially combined with a brine pipe?
rick201814 Oct 2022 14:37
Take a look at Doyma seals. One with multiple penetrations would work.
DASI9014 Oct 2022 14:39
rick2018 schrieb:

Take a look at Doyma seals. One with multiple entries. That would work.

Does the brine pipe and electrical wiring not interfere with each other?

I'm currently not sure how, or if, you can remove the probe without the brine leaking out. Or is there probably not much pressure on it anyway?
rick201814 Oct 2022 15:32
Both pipes run through one seal. It’s a multi-service line. But yes, you need to disconnect the pipe to replace the seals. I don’t know what pressure is on it. But I would estimate a maximum of 1.5 bar (22 psi).
DASI9014 Oct 2022 15:35
It is a Doyma seal. Do you mean that we can use the seal we have for several pipes as well?
rick201814 Oct 2022 15:59
Yes, but the rubber insert is different. It will be completely replaced.
There are universal ones available, with 1 to several sleeves and in various diameters.
The one you have is only for a single pipe.