25mm to 3/4" PVC Adapter

Overview

Bridge metric plumbing to standard U.S. sizes with this compact 25 mm to 3/4" PVC adapter. Ideal for aquariums, sumps, ponds, and RO/DI setups, it solvent-welds directly to 25 mm metric pipe on one side and standard 3/4" Schedule 40 PVC on the other—making pump swaps and equipment upgrades simple and leak-free.

Key Features

• Metric ↔ Imperial Conversion – Join 25 mm metric pipe to 3/4" IPS Schedule 40 PVC.

• Solvent-Weld Sockets – Smooth, full-depth sockets for strong, permanent bonds.

• Aquarium-Safe PVC-U – Inert, corrosion-resistant material for freshwater and marine use.

• Full-Flow Design – Smooth bore minimizes head loss and microbubble generation.

• Compact Footprint – Fits tight spaces in stands and sumps.

• Durable & Serviceable – Compatible with standard PVC primer/cement; long service life.

Product Specifications

• Type: Reducing/transition adapter

• End A (Metric): 25 mm socket (solvent-weld)

• End B (Imperial): 3/4" Schedule 40 socket (solvent-weld, IPS)

• Material: PVC-U (Schedule 40)

• Color: Gray (low-glare)

• Pressure Rating: Up to 150 psi @ 73 °F (de-rate with temperature)

• Temperature Range: 40–140 °F (4–60 °C) typical for PVC

• Chemical Resistance: Freshwater, saltwater, most common aquarium additives

• Standards: ISO 1452 (metric side), ASTM D2466 (imperial side)

• Applications: Aquarium/sump plumbing, pump transitions, UV/return lines, reactors

Installation Tips

• Dry-fit first; mark orientation.

• Chamfer/deburr pipe ends; clean with PVC cleaner.

• Use appropriate primer and medium-body PVC cement; insert fully with a 1/4-turn twist.

• Hold 30 seconds; allow full cure per cement instructions before pressurizing.

• Not for compressed air or gas service.

Need threaded or barb versions (25 mm × 3/4" NPT or 25 mm × 3/4" hose barb)? I can add those variants, too.