The MSME registration asks for the business activity by NIC code. For installation of plumbing for water, gas and sanitation equipments, that activity is 43221.
NIC code · National Industrial Classification 2008
43221 is the 5-digit NIC 2008 code for installation of plumbing for water, gas and sanitation equipments: a sub-class of class 4322, plumbing, heat and air-conditioning installation, within division 43, specialized construction activities. Search a code or activity below, or copy the code for your Udyam or SPICe+ form.
This code
Division 43Group 432Class 4322Sub-class 43221
Installation of plumbing for water, gas and sanitation equipments
Sub-class 43221 · Class 4322 · Group 432 · Division 43 · Section F, NIC 2008
The code
Where the code sits in the National Industrial Classification 2008, from section to sub-class, in the official wording.
432215 digits: 43 + 2 + 2 + 1NIC 2025 · Notice dated 16 October 2026
On 18 November 2025 the Ministry of Statistics and Programme Implementation released NIC 2025, which uses 6-digit codes aligned with the UN's ISIC Revision 5. This page shows the NIC 2008 code 43221. The matching NIC 2025 code will be added here once it is mapped from MoSPI's official concordance.
How to read it
An NIC code is built in layers. Each digit narrows the one before it: the division, the group, the class, and finally the 5-digit sub-class. Divisions themselves are grouped under lettered sections.
The broadest numbered layer. Division 43 covers specialized construction activities. It sits in section F, construction.
Electrical, plumbing and other construction installation activities.
Plumbing, heat and air-conditioning installation. The official note for this class is quoted below.
Installation of plumbing for water, gas and sanitation equipments. The full 5-digit code you enter where a form asks for the business activity by NIC code.
What it covers
43221 is a sub-class of class 4322, plumbing, heat and air-conditioning installation. The NIC 2008 document explains the class in the note below, quoted exactly.
This class excludes:
- - installation of electric baseboard heating, see 4321
Where you use it
Two registration forms ask for the business activity by NIC code. This is where 43221 is entered.
The MSME registration asks for the business activity by NIC code. For installation of plumbing for water, gas and sanitation equipments, that activity is 43221.
The company incorporation form asks for the main industrial activity of the proposed company by NIC code.
Not GST. GST registration does not use NIC codes; goods and services there are classified by HSN and SAC codes.
Choosing the right code
43221 is for installation of plumbing for water, gas and sanitation equipments. The codes below sit closest to it in NIC 2008: the other sub-classes of class 4322. Each has its own page with the official wording.
43222Class 4322 · another sub-class of the same class43229Class 4322 · another sub-class of the same classClass 4322 has 3 sub-classes in NIC 2008, including 43221.
Questions
Installation of plumbing for water, gas and sanitation equipments, in the National Industrial Classification 2008. It is a sub-class of class 4322, plumbing, heat and air-conditioning installation.
Class 4322, plumbing, heat and air-conditioning installation, has 3 sub-classes in NIC 2008. Besides 43221, they are: 43222 (Installation of heating systems (electric, gas and oil), furnaces, cooling towers, non-electric solar energy collectors etc.); 43229 (Other plumbing, heat and air conditioning activities n.e.c.).
In Udyam Registration, which asks for the business activity by NIC code, and in the SPICe+ company incorporation form, which asks for the main industrial activity by NIC code. GST registration does not use NIC codes.
About this page
The section, division, group, class and sub-class on this page, and the explanatory note for class 4322, are taken word for word from the official document “National Industrial Classification (All Economic Activities) 2008”, Central Statistical Organisation, Ministry of Statistics and Programme Implementation, Government of India.
This is reference information on the classification of a business activity. It is not advice on which code your own business should declare, and the official NIC document prevails if the two ever differ. A change in the classification, including the MoSPI concordance to NIC 2025, re-opens this page for checking.
Not sure which code fits your activity, or spotted a mismatch? Use the WhatsApp button on this page and tell us what the business sells and how.