Installation, repair and maintenance of plumbing for water, gas and sanitation equipment, excluding hospital gas systems.
Use this mapping for plumbing installation and repair. It is separate from electrical installation and general building construction.
A plumbing business is generally classified as a specialised construction activity when it installs water, sanitary or related piping systems in buildings. NIC 432201 is the key code to review for plumbing installation work. It can fit an independent plumber, a maintenance contractor or a firm handling plumbing packages on residential and commercial projects.
The defining feature is work performed on plumbing systems at a customer’s site. Selling pipes, taps or sanitary ware from a shop is a trading activity. Manufacturing pipes or fittings is manufacturing. A plumber who installs, replaces or connects these components is providing a specialised installation service.
Typical assignments include fitting water-supply lines, installing sanitary connections, replacing pipework, connecting sinks and washbasins, installing taps and fixtures, setting up drainage connections and carrying out plumbing portions of new construction or renovation. Maintenance jobs can also fit the same business profile when they involve repair or replacement of installed plumbing systems.
A general building contractor may include plumbing in a complete construction project, but a subcontractor hired specifically for plumbing has a narrower economic activity. The general contractor can remain classified under building construction while the plumbing subcontractor uses the specialised installation code. The two businesses participate in the same project but perform different functions.
Many plumbers supply materials as part of a job. Buying a tap, pipe or fitting and charging the customer for it does not automatically turn the business into a retailer if the contract is fundamentally for installation service. The position changes when the enterprise runs a shop where most revenue comes from selling sanitary ware and plumbing products, with fitting offered only as an extra. In that case retail activity may become principal.
Large MEP contractors can also combine plumbing with electrical, HVAC and other installations. Where one line clearly dominates, use it as the principal activity. If multiple specialised services are substantial, additional NIC codes can better represent the business.
For registration, describe the work precisely and match it to the NIC version shown on the relevant portal. “Plumbing services” is more useful than a vague label such as “contractor”, because the code should reflect the real economic activity carried out by the establishment.
For a typical plumber, the primary NIC 2025 code to investigate is 432201 - Installation, repair and maintenance of plumbing for water, gas, and sanitation equipment (excluding hospitals gas fittings).
Use this page as a shortlist and then verify the final code against the linked official NIC page. NIC describes the economic activity. It does not issue a licence, replace GST/HSN/SAC classification, or guarantee approval in Udyam, MCA or any regulated filing.
Choose the NIC code that matches the principal activity, usually the activity that generates the largest share of revenue or best describes the entity being registered.