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Ashirvad Flowguard Plus CPVC Reducer Coupler
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Ashirvad Flowguard Plus CPVC Reducer Coupler is a transition fitting for connecting two CPVC pipes of different diameters, designed for reducing pipe size in hot and cold water distribution systems with leak-free solvent weld joints.
Ashirvad Flowguard Plus CPVC Reducer Coupler enables seamless transitions between different pipe sizes in CPVC plumbing systems. This precision-molded fitting features two socket connections of different diameters, allowing you to reduce from a larger main line to a smaller branch or fixture supply line. The gradual internal taper ensures smooth water flow without turbulence or excessive pressure drop at the transition point.
Manufactured from high-grade CPVC compound with FlowGuard Gold technology, this reducer coupler maintains full pressure rating across both socket sizes. The fitting is essential for optimizing pipe sizing throughout a plumbing system, using larger pipes for main distribution and smaller pipes for individual fixtures to balance flow rates and material costs. Compatible with all Ashirvad Flowguard Plus CPVC pipes when installed with recommended solvent cement.
| Specification | Details |
|---|---|
| Fitting Type | Reducer Coupler (Size Transition) |
| Material | CPVC (Chlorinated Polyvinyl Chloride) |
| Maximum Temperature | 93°C (200°F) continuous service |
| Pressure Rating | SDR-11 (PN 15 / 15 kg/cm² at 25°C) |
| Connection Type | Socket (Solvent Weld) - Two different sizes |
| Standards | ASTM D2846, NSF certified for potable water |
Common CPVC reducer coupler sizes include 25mm x 20mm (1" x 3/4"), 25mm x 15mm (1" x 1/2"), 20mm x 15mm (3/4" x 1/2"), and other combinations. The first size is the larger socket, the second is the smaller socket. Always verify the reducer size matches your specific pipe diameters before installation.
While physically possible, reducer couplers are designed for size reduction, not expansion. For increasing pipe size, the fitting is typically called a "reducer" or "increaser" and may have different flow characteristics. In most plumbing systems, pipe size reductions are more common as you move from main lines to branch lines and fixtures.
A properly sized reducer coupler causes minimal pressure drop due to its gradual internal taper. However, reducing pipe size does increase flow velocity, which can slightly affect pressure. For optimal performance, size reductions should be gradual (e.g., 1" to 3/4" rather than 1" to 1/2") and placed strategically in the system.
The larger socket opening is clearly visible compared to the smaller one. When ordering, the size is typically written as "large x small" (e.g., 3/4" x 1/2" means 3/4" socket on one end, 1/2" socket on the other). Always dry-fit pipes before cementing to verify correct orientation.
While possible, avoid using multiple reducers in close succession as this creates excessive turbulence and pressure drop. If significant size reduction is needed, use one appropriately sized reducer or space multiple reducers several feet apart. For complex sizing requirements, consult plumbing design guidelines or use gradual reductions with proper spacing.

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