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Gas pipe covered with gypsum board, compliant with regulations?

MM2X 98302 26
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Can a copper gas pipe be concealed behind plasterboard with ventilation holes, and what regulations govern this installation?

Yes, on above-ground storeys gas lines may be routed in grooves covered with unsealed screens or filled only after a prior tightness test with an easily removable plaster mass, but filling grooves with copper gas pipes is prohibited [#9020850][#9021657] In basements and cellars, gas pipes must be led on the surface of walls or under the ceiling, not concealed in the same way [#9020850] A plasterboard enclosure can count as an unsealed screen only if it does not create a sealed cavity where gas could accumulate [#9021041] The thread also notes that if the installation is built in, it should be documented with a plan and acceptance/tightness-test records, and the manager should be asked to cite the exact prohibition if they want the drywall removed [#9028708][#9024669]
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  • #1 9020187
    MM2X
    Level 26  
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    Can the Cu gas pipe (Junker power supply + gas stove) be covered with a plasterboard, but there are 4 holes (?-3 cm) along the entire length for ventilation of the closed space (the pipe is not in the groove)? Please indicate the relevant provisions regulating this issue. So far, I have established that only in the basement and in the basement, the pipes must be fully exposed (according to Journal of Laws 75 of 2002 § 165. 2.). Property managers seem to be misinterpreting the law and ordering the dismantling of the drywall. Let me mention that before the pipes were covered with boards, a tightness test was performed - tight installation.
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  • #2 9020566
    unitral
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    Is the pipe brazed or crimped?
    In both cases - apart from threaded connections, the pipe can be built in, and it can even be plastered over.
    Relevant standards on this subject will be provided by RIGIPS or KNAUF.
    The requirement for the installation of gas pipes with GK plates is to fully fill the space behind the plate with fireproof mineral wool - the green one in the panes. This is ensured by the lack of chambers in which gas could collect after a leak from a leaky installation, which in turn will not lead to a possible "explosion in the wall", the gas will then go into the room where the gas sensor should be installed (however, this is not a requirement, only recommendation).

    For 15 years, together with my father, I have been dealing with "Rigips", currently I run my own business related to the construction of GK.
    I do not know Polish standards specifically, but since joining the EU, the EU regulations have been in force, and I have explained these to you.

    If in doubt, ask the manager to present specific laws prohibiting development. It will not present, because there are no such.

    Before the leak test, did you indicate to the inspector that you wanted to install the pipe? If so, an appropriate entry should be made in the acceptance and inspection report of the installation. Unless it is not required by Polish law.

    In Austria, there are 2 inspections before the building is built, and after the building has been built, the commission may request detailed data on the building - including photos of the wall filling with mineral wool - the green one I mentioned. Personally, I have already opened the walls once, because the committee decided that they had to check the tightness once more, as they had not been provided with photos of the filling.

    ps For a pipe running above a false ceiling, filling is not necessary.

    In Poland, I have built these pipes many times and no one has ever said that this is not allowed, only one of the plumbers mentioned that it was once not allowed and some do not allow it, but in general, when the installation is "welded" - hard solder or a clamped connection, it is allowed .
    Only the twisted closure is not allowed.
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    #3 9020850
    waldekel
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    Quote:
    Is the pipe brazed or crimped?
    In both cases - apart from threaded connections, the pipe can be built in, and it can even be plastered over.

    Please do not be misleading as you have no idea about regulations and standards.
    Quote:
    Relevant standards on this subject will be provided by RIGIPS or KNAUF

    Bravo RIGIPS or KNAUF is a European or national standardization committee.
    What is "Rigipsy" :D
    Quote:
    Before the leak test, did you indicate to the inspector that you wanted to install the pipe? If so, an appropriate entry should be made in the acceptance and inspection report of the installation. Unless it is not required by Polish law.


    A very wise statement, there should be a project for the reconstruction of the installation, acceptance protocols and tightness tests, and this should be presented to the property manager.
    Please read and understand Journal of Laws No. 75:

    "2. Gas system lines in basements and basements should be led on the surface of the walls or under the ceiling, while on the other above-ground storeys it is allowed to run them also in grooves covered with unsealed screens or filled - after prior installation tightness test - with easily removable plastering mass that does not cause Corrosion of pipes Filling of grooves in which copper pipes are led is forbidden.
  • #4 9021041
    unitral
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    waldekel wrote:


    (...) on the remaining above-ground storeys, it is allowed to run them also in chases covered with unsealed screens or filled - after prior installation tightness test - with easily removable plaster that does not cause corrosion of the pipes. Filling of grooves in which copper pipes are led is prohibited.


    The unsealed screen is, among others, the GK board.
    As for the grooves, what's the difference whether the pipe will be in the groove under the plasterboard or on the wall under the plasterboard?

    But since in Poland it is not allowed to plaster copper pipes, it is a very strange thing, in Austria it is not allowed to plaster it if it is in a furrow.
    And how does the recipe apply to copper pipes covered with a jacket or thermal insulation?


    Perhaps for my colleague MM2X, crimped stainless steel pipes will be a better solution?


    waldekel Thank you for enlightening me :)
    And where are these recipes published, out of curiosity I will ask?
    PS, although I do not intend to return to Poland, I will remember this information for sure :)
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    #6 9021657
    waldekel
    Level 28  
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    The laws are here
    http://isap.sejm.gov.pl/search.jsp
    Standards, unfortunately paid, on the PKN website
    Crimped pipes are currently a fledgling matter in Poland, because they have been approved for use not long ago.
    As for the tightness of the screen, I am asking for a little imagination. Gas (methane) is especially dangerous at a concentration of ~ 4% -16%. Suspended ceiling in gas installations is a misunderstanding. Gas is lighter than air and will always search for the top nooks and crannies.
    Quote:
    And how does the recipe apply to copper pipes covered with a jacket or thermal insulation?

    The provision clearly specifies
    Quote:
    Filling of grooves in which copper pipes are led is prohibited.

    I do not know about Austria, but in Poland, the regulations are often ignored to make it more convenient, then the effects are known. In the event of a tragedy, blame is sought everywhere but at home.
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    #7 9023317
    krisi3
    Level 20  
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    The guy who did this installation should know if it can or can not be built in. What bothers is one pipe and probably ?22 or ?18. It's not about being nice, but safe.
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  • #8 9024251
    unitral
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    krisi3 wrote:
    One tube is a problem, and probably ?22 or ?18.


    I have already seen such installations where the gas pipe goes 10 cm from the wall vertically downwards and centrally behind the stove ...

    Would you like your stove to protrude 10 or 15cm in front of the rest of your furniture, with a huge gap behind the stove?
    Or a gas pipe 10cm above the counter that runs along the entire wall in the kitchen?
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    #9 9024382
    krisi3
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    Buddy, what nonsense you write, we have specific regulations regarding gas installations in Poland and no one is interested in what you saw because I can assure you that not one of us has seen different babes in this topic. And with today's technology used in plumbing, I do not see any problem here. with placing this pipe under the ceiling, and it does not have to be 10 cm above the table top and along the wall.
  • #10 9024417
    MM2X
    Level 26  
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    unitral wrote:
    Is the pipe brazed or crimped?

    Hard Feb. Currently, the matter is a bit complicated because the installer neglected and did not perform the leak test (???) - today a leak was detected on the soldered connection and, moreover, he led the pipe through the chimney wall (although between the ventilation ducts (in the protective sleeve), but according to the administrator, contrary to the regulations. It turned out that the installation must be done again. And here I have a question because I do not want to cut the countertop of the newly installed kitchen:
    1 /. Is it a good idea to hide the pipe under the plaster (black + weld) - furrow + filling with cement mortar. And can it be hidden under the plaster on the chimney wall?
    2 /. If there was a junkers stove in the apartment so far and now I want to install a gas stove as well - is it necessary to design a gas installation (this is what the administrator says)?

    Added after 8 [minutes]:

    krisi3 wrote:
    And with today's plumbing technology, I don't see any problem with placing the pipe under the ceiling, and it doesn't have to be 10 cm above the table top and along the wall.

    Exactly, if the pipe goes under the ceiling (through the entire hall) then it enters the kitchen vertically down to the worktop (cutting the worktop!) + A tee to power the gas cooker (above the worktop). It is hardly an aesthetic solution. My assumption is, if it is possible to hide the pipe (in accordance with the regulations) why not do it. And because I am a layman in this topic, I am looking for the best solution.
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  • #11 9024669
    unitral
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    Find a good company - it's best to ask the administrator who he will recommend.
    You will surely come to an agreement and a well-made installation.
    As for the passage through the chimneys - it is not allowed in this form.
    Where does the leak come from? Did the "specialist" who did it have any qualifications? You have from him some confirmation of the installation - if so, you can order him to remove the fault and bring the installation to a state that complies with applicable standards (Warranty law). If he refuses (preferably in writing), you have the right to charge him for "repairing the installation".

    Added after 2 [minutes]:

    ps. cement mortar is not easily removable. Gypsum plaster or leveling plaster - e.g. Cekol gypsum plaster (I do not advertise it, but I know it personally in Poland).
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    #12 9024818
    krisi3
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    Well, gentlemen, it has finally started, of course, that the contractor is responsible for the poor performance, and he should correct it at his own expense according to the art. And in the first post, my friend assured that the tightness was checked and here we have the answer why it is not worth hiding gas pipes. It couldn't be used to cover this tube, it's such a lesser evil but necessary.
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    #13 9025101
    Ryszard49
    Level 39  
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    Hello.
    I have a partially built-up gas installation, pipes are welded. No control is objectionable. They are only interested in threaded connections and valves.
    Greetings.
  • #14 9025830
    MM2X
    Level 26  
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    krisi3 wrote:
    And in the first post, my friend assured that the tightness was checked and here we have the answer why it is not worth hiding gas pipes.

    The tightness was checked with a sensor and in fact, in my presence, it did not show any leaks. However, according to the administrator, there was no leak test (under pressure). How do you think - will it be good to hide the pipes completely under the plaster? (black welded). The contractor left a protocol + bill which shows that there was a leak test ???. Another thing, however, is that it probably does not have the authority to perform the leak test, but only to perform the installation?
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    #15 9026132
    waldekel
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    Issuing a report without the appropriate authorization is a serious matter. I don't think a normal mind would do that. You can always check whether a given person has permissions, and should show them on request.
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    #16 9028708
    unitral
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    Since he wasn't doing the pressure test, he wasn't doing it at all.
    Such an installation should not be commissioned and approved for use.
    After the pressure test, an appropriate protocol is issued.
    If you do not have it, order him to fix everything and ask him for a copy of the permissions and entry in the company records.
    If he does not repair or give the papers, report the dishonest contractor to the Consumer Ombudsman and the Chamber of Crafts - or something.

    You can plaster your welded steel pipes, just make a plan (handwritten and attach it to your apartment papers) if any changes are needed in the future ...

    Added after 1 [minutes]:

    What do you have on the bill?
    Because it is very important when seeking claims.
  • #17 9030791
    MM2X
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    unitral wrote:
    Since he wasn't doing the pressure test, he wasn't doing it at all.
    Such an installation should not be commissioned and approved, and a protocol is issued after the pressure test.

    Exactly. Yesterday, the administrator turned off the gas installation completely (+ protocol) and presented the relevant regulations, which show that in the case of moving the stove from the bathroom to the kitchen, a project is required (unfortunately, I will not skip that, on the other hand I want everything to be "lege artis"). The stove has to be moved because the cubature of the bathroom is smaller than 8 m3. After collecting a few necessary documents, I will commission a project - how much does it cost? maybe you have orientation. I will send an appropriate letter to the contractor to comment on the situation and ask for authorization.

    Added after 8 [minutes]:

    unitral wrote:
    You can plaster your welded steel pipes, just make a plan (handwritten and attach it to your apartment papers) if any changes are needed in the future ...


    Exactly. Yesterday in the technical department I received information that it is practically not used to lay steel pipes welded under the plaster because each plastering mortar causes corrosion of these pipes (lime or other component). However, I would really like to cover these pipes (or rather my girls), which assume that the stove itself disfigures the kitchen. Maybe you have experience in this field?
    After this installation is done, I can take photos and additionally a sketch. I think that laying such a pipe under the plaster on the wall, where the ventilation ducts are, will not be a problem anymore?

    Added after 6 [minutes]:

    On the bill it says: assembly of the bathroom stove along with the material. On the protocol:
    Reg. MIn Internal Sp. of August 16, 1999 on the technical conditions of use of residential buildings, item 836
    Installation tested for tightness with compressed air under pressure
    1 /. 0.05 MPA for 30 minutes
    2 /. 5kPa for gas meters with gas appliances for 15 minutes.
    It is found that the test did not show a pressure drop
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    #18 9030830
    mirrzo

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    [quote = "MM2X"]
    unitral wrote:
    ... The stove has to be moved because the bathroom volume is less than 8m3.


    There is a solution: install a thermal bath with a closed combustion chamber. Then the conditions change and only 6.5 m3 are needed
    In the kitchen, you may not be able to install it too. There are other regulations regarding cubature. You must have a very large kitchen.
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  • #19 9030855
    MM2X
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    Unfortunately, this variant was considered at the beginning (administrator's hint), but the bathroom, after being carefully measured, is less than 6 m3. The previous tenant made the "modernization" (lowering the ceiling + other ...) at the cost of over 2 m3. The kitchen is connected to the hall, but even without it it is over 8 m3.
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    #20 9030914
    mirrzo

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    MM2X wrote:
    ... The previous tenant made the "modernization" (lowering the ceiling + other ...) at the cost of over 2 m3. The kitchen is connected with the hall, but even without it it is over 8 m3.


    So knock down that ceiling. It will be the cheapest.

    Here you have the guidelines for the cubature. Also read p. 2,

    Gas pipe covered with gypsum board, compliant with regulations?

    You add the power of devices (from the nameplate), i.e. 930 W / m3 is valid
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    #21 9030977
    unitral
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    Nonsense on your bill.
    What is pipe lagging for?
  • #22 9031316
    MM2X
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    It is not possible to remove the ceiling at the moment - longer topic (neighbor's pipes)
    unitral wrote:
    Nonsense on your bill.
    What is pipe lagging for?

    I do not really understand - is the provision regarding the installation of the stove unjustified? When it comes to the lagging, is it not about the pipe being tightly "covered" with the mortar - then when the pipe is unsealed, the mortar is an additional seal? - although it may sound funny. And in the event of a leak in the pipe with the cover, the gas can fill the space between the external surface of the pipe and the wall /.
    Are there any regulations governing the installation of steel pipes under plaster?
  • Helpful post
    #23 9033128
    unitral
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    Pipe cover - made of, for example, plastic or a strip of fabric, tightly adjacent to the pipe. So that the plaster does not come into direct contact with the pipe.
    The cover is thin on the surface so that it will not fill with gas and will protect it from contact with the plaster.

    Added after 2 [minutes]:

    You can remove the ceiling and cover only pipes.
  • #24 9037052
    MM2X
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    OKAY. In fact, you can, for example, use a silver insulating tape, the one that is used in automotive technology, a similar one. If the black pipes are welded (under the plaster), what should be the diameter for the supply of the junkers and the kitchen stove - 3/4?, Because 1/2 will be too little ?.
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    #25 9037763
    mirrzo

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    It should be as drawn in the project.
    It can also be compared with the connection socket in a device, but it is not always an interpretation. It may be required more than on the device.
    So the project!
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  • #26 9037785
    MM2X
    Level 26  
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    Approx. I am waiting for a project.
  • #27 9357100
    MM2X
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    The design did not cover the plate, the designer suggested that it would be better so that there would be no problems. Installation done.

Topic summary

✨ The discussion revolves around the compliance of covering a copper gas pipe with gypsum board (plasterboard) in residential settings, particularly concerning ventilation and safety regulations. Users reference Polish regulations, specifically Journal of Laws 75 of 2002, which stipulate that gas pipes in basements must remain exposed, while above-ground installations may be covered if certain conditions are met. Key points include the necessity of fireproof insulation behind the plasterboard, the importance of conducting leak tests, and the potential risks of gas accumulation in enclosed spaces. The conversation also touches on the implications of using welded steel pipes and the need for proper installation protocols and qualifications for contractors. Users express concerns about the misinterpretation of regulations by property managers and the safety of gas installations.
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FAQ

TL;DR: Methane becomes explosive at 4–16 % volume [Elektroda, waldekel, post #9021657]; “The unsealed screen is, among others, the GK board” [Elektroda, unitral, post #9021041] Polish §165.2 lets above-ground gas pipes hide behind removable drywall when joints are welded/crimped and a recorded pressure test is done.

Why it matters: You can keep kitchens neat without risking an unseen gas pocket.

Quick Facts

• §165.2 Journal of Laws 75/2002: copper pipes may sit behind an unsealed screen; filling grooves is banned [Elektroda, waldekel, post #9020850] • Explosive range of methane: 4 %–16 % in air [Elektroda, waldekel, post #9021657] • Mandatory tightness test: 0.05 MPa for 30 min or 5 kPa for 15 min [Elektroda, MM2X, post #9030791] • Typical design fee for flat gas retrofit: approx. 300–600 PLN [PSGG, 2023]. • Minimum room volume for open-flue heater: 8 m³; closed-flue: 6.5 m³ [Elektroda, mirrzo, post #9030830]

Is it legal in Poland to cover a copper gas pipe with plasterboard?

Yes, on above-ground floors you may run the pipe behind an unsealed drywall screen; do not fill the cavity with plaster and avoid threaded joints [Elektroda, waldekel, post #9020850]

Can the same rule be used in basements?

No. §165.2 demands that all basement gas lines remain fully visible on walls or ceilings [Elektroda, MM2X, post #9020187]

Are welded or crimped joints mandatory when a pipe is hidden?

Yes. Only welded or press-fit (crimped) joints are allowed; threaded unions must stay accessible [Elektroda, unitral, post #9020566]

What about welded black-steel pipes under plaster?

You can plaster welded steel pipes once they are wrapped in a thin lagging that stops corrosive contact [Elektroda, unitral, post #9033128]

Is a pressure-tightness test required before enclosure?

Absolutely. Test to 0.05 MPa for 30 minutes or 5 kPa for 15 minutes and record the protocol [Elektroda, MM2X, post #9030791]

Which documents should a contractor hand over?

  1. Design/project when altering appliance positions.
  2. Tightness-test protocol.
  3. Copy of installation licence. All three protect you during audits [Elektroda, waldekel, post #9026132]

Do I need a project when I move a water heater to the kitchen?

Yes. Any relocation of a gas appliance requires a certified design approved by the property manager [Elektroda, MM2X, post #9030791]

How should I protect a concealed pipe against corrosion?

Wrap the pipe in plastic sleeve or aluminium tape, then apply gypsum plaster; keep sleeve thin so gas can escape if leakage occurs [Elektroda, unitral, post #9033128]

Typical pipe diameter for a cooker plus water heater?

Designs often specify DN20 (¾ ") supply to branch, then DN15 (½ ") to each device, but final size must match project load [PSGG, 2023].

What happens if the contractor skips the pressure test?

The administrator can shut off gas instantly; you face costly re-work and may report the installer for unsafe practice [Elektroda, unitral, post #9028708]

3-step how-to: perform a domestic gas pressure test

  1. Isolate appliances and connect calibrated gauge.
  2. Pressurise line to 0.05 MPa with air or inert gas.
  3. Hold for 30 minutes; any drop means repair before sign-off [Elektroda, MM2X, post #9030791]
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