Description
The SWR Reducer is an essential PVC/uPVC drainage fitting used to join two SWR pipes of different sizes, allowing a smooth transition from a larger pipeline to a smaller outlet without affecting drainage performance. It is widely used in apartments, villas, commercial buildings, hospitals, hotels, factories, and industrial drainage systems across Bangalore.
This fitting is commonly referred to by several names in the plumbing and drainage market, including SWR reducer coupler, PVC SWR reducer, SWR pipe reducer, and 4 inch SWR reducer. These common naming variations help plumbers, contractors, and hardware suppliers in Bangalore quickly identify the fitting for size transition applications.
The main function of the SWR Reducer is to reduce pipe diameter while maintaining efficient wastewater or rainwater flow. It is commonly used in soil stacks, bathroom waste lines, terrace rainwater downpipes, wash area outlets, underground sewer connections, and inspection chambers. This makes it highly important in apartment drainage shafts and commercial building drainage networks across Bangalore.
The 4 inch SWR reducer is one of the most widely used variants, especially for converting 110mm main SWR stacks into smaller branch or outlet lines. This is particularly useful in terrace rainwater systems and multi-floor drainage projects.
Manufactured from premium-grade PVC/uPVC SWR material, the reducer offers excellent resistance to wastewater chemicals, corrosion, moisture, scaling, and long-term outdoor exposure. This makes it highly suitable for Bangalore’s drainage conditions and heavy monsoon rainwater systems.
Its smooth internal flow path minimizes turbulence and reduces the chance of blockage, ensuring long-term drainage efficiency.
For GST invoicing and stock classification, the SWR reducer HSN code is commonly 39172390, which is often used for rigid PVC drainage pipe fittings.
Customers searching for durable PVC SWR reducer solutions in Bangalore choose this fitting because it offers precise size transition, leak-proof joining, smooth drainage flow, and long service life. Whether for apartment soil stacks, terrace rainwater lines, industrial drainage systems, or wholesale SWR supply, the SWR Reducer remains a trusted professional-grade solution for pipe size reduction in Bangalore.





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