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
DASI901 Sep 2022 21:06
Yes, that’s true as well. I will take a look. But now another question. Is it not possible to install another water meter outside the house? We have an inspection chamber at the point where the service connections enter the property. The connections then lead to the utility room through a multi-utility connection into the house. Can I have a branch installed in the inspection chamber to run a pipe to the outdoor storage, including a water meter in the outdoor storage? Or is that not allowed?
rick20181 Sep 2022 21:24
Why do you still want a water meter? To monitor how much water flows into the pool. You can simply buy one and install it. Either inside the house at the branch-off point or later in the equipment room.

A pool is not considered garden water, so an exemption doesn’t make sense. Usually, it doesn’t help anyway because you have to pay installation fees, an annual charge, etc., since you need a calibrated and sealed water meter.
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borderpuschl
2 Sep 2022 09:02
I believe DASI90 means a separate connection (a second connection) for the pool, as he wants to branch off before the main house connection. That is probably why there is a second water meter for this own connection. Here in Baden-Württemberg, the local utility company would most likely not allow something like that. I personally wouldn’t go to such great lengths just for water refill. As I said, it doesn’t really matter whether the automatic refill runs for 10 seconds or 5 minutes. The same amount of water will always be refilled; how long it takes is irrelevant.
DASI902 Sep 2022 09:42
borderpuschl schrieb:

I believe DASI90 means a separate connection (a second connection) for the pool since he wants to branch off before the main house line. That’s also why there’s a second water meter, indicating its own connection. Here in Baden-Württemberg, the local utility company would very likely not allow something like that. I wouldn’t go to such great lengths just for the water refill either. As I said, it doesn’t matter if the automatic refill runs for 10 seconds or 5 minutes. The same volume of water will be refilled either way, so how long it takes is irrelevant.

Yes, that’s exactly what I mean.

So a separate connection that doesn’t go through the house. My idea was that this would also provide enough flow for irrigation. Especially since we still need to dig a trench to the inspection chamber anyway, because wastewater also needs to be connected.
Tolentino2 Sep 2022 10:39
You have both wastewater and drinking water in the same shaft?! That wouldn’t be allowed here.
DASI902 Sep 2022 10:42
Tolentino schrieb:

You have both wastewater and drinking water in the same shaft?! That wouldn’t be allowed here.

It’s possible that the wastewater is in a separate shaft. We have two side by side in that location. In any case, they would basically have the same type of access.