ᐅ First water from the tap is stagnant and contains limescale.
Created on: 15 Jan 2024 07:31
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UbibubiHello everyone,
We have been living in our newly built house for a few months now and have noticed that the first cold water in the morning from any tap (whether in the kitchen or bathrooms on the ground or upper floor) always tastes very stale and has a strong presence of limescale, despite having a water softener installed. When I let the first 300-400 ml (10–14 fl oz) run, the taste normalizes and the limescale content gradually decreases. I wonder if this is normal due to the standing water in the pipes overnight or if there is something wrong with the plumbing installation. The water hardness test kits also recommend letting the water run for a minute before testing. However, in daily life, this is not very practical and leads to considerable water waste. My expectation would actually be water quality similar to sparkling water and a normal taste right away. What do you think could be the cause?
By the way, the water softener installed is a BWT Perla One. We also have a Conel CLEAR 2.0 backwash filter. Activating the filter freshly does not seem to affect the issue described above. We also use a Grundfos Comfort PM recirculation pump, which runs once a day for a few minutes. The domestic hot water storage tank is a WAS ECO 165 l (44 US gallons), integrated with our Weishaupt LS8-B heat pump.
Thanks in advance for your opinions!
We have been living in our newly built house for a few months now and have noticed that the first cold water in the morning from any tap (whether in the kitchen or bathrooms on the ground or upper floor) always tastes very stale and has a strong presence of limescale, despite having a water softener installed. When I let the first 300-400 ml (10–14 fl oz) run, the taste normalizes and the limescale content gradually decreases. I wonder if this is normal due to the standing water in the pipes overnight or if there is something wrong with the plumbing installation. The water hardness test kits also recommend letting the water run for a minute before testing. However, in daily life, this is not very practical and leads to considerable water waste. My expectation would actually be water quality similar to sparkling water and a normal taste right away. What do you think could be the cause?
By the way, the water softener installed is a BWT Perla One. We also have a Conel CLEAR 2.0 backwash filter. Activating the filter freshly does not seem to affect the issue described above. We also use a Grundfos Comfort PM recirculation pump, which runs once a day for a few minutes. The domestic hot water storage tank is a WAS ECO 165 l (44 US gallons), integrated with our Weishaupt LS8-B heat pump.
Thanks in advance for your opinions!
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Benutzer 100115 Jan 2024 09:19Why is the water standing still? Don’t you have any circulation? If the water is stagnant, I would also check your water softening system to make sure nothing is growing inside it.
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jokersmile15 Jan 2024 09:43Is the first half liter really higher in lime content than the rest (measure with the kit from the system!), or is that just your subjective impression? If the water is decalcified quite strongly, it could also be dissolved carbon dioxide (keyword: lime-carbon dioxide equilibrium).
In der Ruine15 Jan 2024 10:04Offtopic schrieb:
Why is the water standing still? Don’t you have circulation? If the water is stagnant, I would also check your water softening system to make sure nothing is rotting inside.Circulation for cold water? Luxury, luxury.jokersmile schrieb:
Is the first half liter really higher in hardness than the rest (measure with the test kit from the system!), or is that just your subjective impression? When the water is significantly softened, it could also be dissolved carbon dioxide (keyword: calcium carbonate–carbon dioxide equilibrium).I measured it myself. At the beginning, it’s about 6-7 degrees dH and then settles around the target value of 3-4.
Offtopic schrieb:
Why is the water standing still? Don’t you have circulation? Stagnant water – I would also check your water softening system to make sure nothing is rotting inside.The system itself probably isn’t the cause, because it was actually replaced once with a completely new one by chance, and the problem occurred with both.