Install 100L hot water boiler without expansion tank

  • Erstellt am 2020-02-05 14:07:25

Jodameister

2020-02-05 14:07:25
  • #1
Hello, I hope I am in the right place.

I have organized a 100L WMB or WWS (hot water boiler / hot water tank) on eBay Kleinanzeigen (whichever is more correct).
It is supposed to be only for the bathroom where the bathtub is, and there is a toilet and a sink. The bathroom with the shower has its own 80L tank which unfortunately is not enough for the bathtub. There is only about a quarter of warm water in the tub. It seems to be slowly giving up.

I have installed a safety group on the 80L WWS because the shower is pressure-resistant.

On the 100L tank, I would like to install a low-pressure fitting so that the expanding water can be released through it.
Unfortunately, to continue operating the bath stove, I would have to redo the roof and rebuild or install a new chimney. That is too expensive and too much for me at the moment. My wife is now pregnant and I want her to be able to run a warm bath if she wants.

Therefore, the bath stove must (for now) be removed. But now I have no room for the expansion vessel and would therefore like to install this WWS as minimally as possible. Is it enough if I

    [*]install a check valve from the controlled residential ventilation to the WWB
    [*]go from the check valve to the fitting
    [*]then lead from the fitting controlled residential ventilation and WWL to the boiler

so carry out a classic low-pressure installation.

Could you approve it like this?

Best regards




 

Mycraft

2020-02-05 14:13:37
  • #2
You're actually in the wrong forum for that...
 

Jodameister

2020-02-05 14:19:41
  • #3
I am very sorry, where should it actually go? Should I write a new post?

Best regards
 

Mycraft

2020-02-05 14:23:09
  • #4
No, I mean the wrong forum altogether... this is about house building and less about DIY sanitary installations.
 

Nordlys

2020-02-05 14:26:04
  • #5
Well, maybe Joedreck, he knows about gas water sh..... here
 

Knöpfchen

2020-02-05 20:13:32
  • #6
You can operate a pressure tank with a pressure cost fitting.
For this, you do not need a safety group, an expansion vessel, or a non-return valve.
The tank only needs to be higher than the outlet fitting.
 

Similar topics
01.01.2010Ground-level pool instead of bathtub?19
14.02.2015Floor-level shower drain with underfloor heating44
14.04.2015Connection of bathtub to shower21
28.04.2016Guest bathroom 75x90 cm shower fixture placement22
05.07.2016Bathroom planning for a small bathroom with a walk-in shower22
22.07.2016Main bathroom (10 sqm) with open shower, any ideas?84
13.07.2016Bathroom layout with shower11
29.04.2018Gas heating + solar & controlled residential ventilation or air-water heat pump Energy Saving Ordinance 201626
29.12.2018Renovation tips for a very small bathroom with a shower instead of a bathtub36
05.01.2019Is an electrical cable allowed under the shower?33
25.01.2020walk-in shower size30
06.04.2020Shower - how to close? - brainstorming11
01.02.2021Underfloor heating beneath bathtub and shower13
23.02.2023Consultation: New bathroom, 5.9 sqm with bathtub48
10.02.2021Is KfW40+ possible even if photovoltaic and controlled residential ventilation were already required for KfW40?15
29.10.2021Bathroom planning - Is the splash guard wall of the walk-in shower long enough?14
28.03.2022Photovoltaics are coming up - Options: 19 kWp, 25 kWp, 30 kWp, Storage?30
05.01.2023Bathroom layout 8.7 sqm, with shower and bathtub16
04.05.2024Oval design bathtub – can it be moved slightly due to dirt behind it?71
30.04.202513,000 to renew old shower and bathtub?17

Oben