ᐅ Backflow Filter / Optional Heat Pump Add-on

Hey,

I had the initial consultation with the plumbing company today.

They offered to upgrade the included "DIN-DVGW certified water filter" to a backwash filter for 120€ (probably net).

Is this recommended? Is the standard filter sufficient? With the backwash filter, it seems the filter replacement, which is normally required at intervals with the standard one, would no longer be necessary.

They also offered to improve something in connection with the heat pump. I can’t quite remember what it was. Maybe someone knows what this could be about—something like self-filling and turning two knobs... and it’s supposed to be very simple, but if the service team comes and takes a sample and detects contamination, then the service becomes more difficult... if I remembered that correctly...

Thanks for any feedback!

Backwash filters are recognized as standard engineering practice. What is the exact wording? In other words, what was ordered?

For the heat pump, there is probably a salt filter to fill. As far as I know, it has to be filled with VE water anyway.

@Mycraft
Nothing has been ordered yet. I am still waiting for a quote.

In any case, a backwash filter would not be included.

So, today I can precisely say what was offered to me:

Backwash filter DN 25, manual, with pressure reducer

and for the air-to-water heat pump:

Purotop wall station micro, for refilling the heating system with treated water according to VDI guideline 2035

The backwash filter is clear and should be taken. For the second part/device/whatever, I have no idea. Is it necessary? What benefits does it provide during operation, and what costs does it entail? This part is offered to me for 270€ gross. I suppose it saves something in the long run, but I don’t remember what exactly... it’s been a while since the plumber explained it to me.

Thanks again for your feedback.

So, we have only used the device twice; it is mounted on the wall and will likely be needed during the initial filling of the underfloor heating system with about 380 liters (100 gallons) of water. In our case, a Taco valve was leaking slightly, causing some water to drip out and the pressure in the underfloor heating system to drop. We opened the valve and refilled it. Despite the VE filter, the heating water became slightly cloudy.