Choosing a copper P-trap for 1-1/2 inch drains requires assessing durability, compatibility with copper DWV systems, and reliable seals that prevent sewer gas leakage. The following products are selected for their common use in household plumbing, durability, and compatibility with 1-1/2 inch fittings. The table summarizes key details to help compare options at a glance.
| Product | Brand | Size | Material | Notes |
|---|---|---|---|---|
| Libra Supply DWV 1-1/2 inch | Libra Supply | 1-1/2 inch | Copper | DWV system compatibility |
| A402LA-RAW | 1-1/2 inch | Copper Brass | LA Code, unfinished | |
| D400G-RAW | 1-1/2 inch | Brass | Ground joint bell flange | |
| A400-01-01 | 1-1/2 inch | Brass | High box flange, polished brass | |
| R400-01-01 | 1-1/2 inch | Brass | High box flange |
Libra Supply DWV 1-1/2 Inch Copper P-Trap
Designed for DWV systems, this Libra Supply copper P-trap features an outer diameter of 1-3/4 inches and a 1-1/2 inch pipe ID. It is intended for use under the discharge of a plumbing fixture to help prevent sewer gas from escaping. The unit is compatible with type DWV hard-temper tubing, making it a practical choice for standard residential drainage. Its copper construction offers durability and corrosion resistance, suitable for long-term plumbing applications.
Key features include: Fitting ID Size: 1-5/8″ (OD 1-3/4″), Fitted Pipe ID Size: 1-1/2″ (OD 1-5/8″), and use under fixture discharge to seal against sewer gases. This model emphasizes compatibility with common copper DWV fittings and reliable performance in standard 1-1/2″ drain lines.
Westbrass A402LA-RAW 1-1/2″ Brass LA Code P-Trap
Westbrass A402LA-RAW is a 1-1/2 inch P-trap with an LA Code configuration and unfinished brass construction. It features a 1-1/2 inch FIP inlet and a standard P-trap inlet, with a ground joint trap outlet on the elbow. The 17-gauge brass build offers durability and resistance to wear in typical bathroom and kitchen drainage setups. It is designed for easy installation and compatibility with standard copper piping.
Highlights include: 1-1/2 in. FIP Inlet, ground joint trap outlet on elbow, and robust brass construction for long-term use. This option is suitable for projects seeking a durable brass P-trap with standard sizing.
Westbrass D400G-RAW 1-1/2″ 17 ga. Tubular Ground Joint P-Trap
This model uses a 17 gauge tubular brass construction and includes brass slip-joint nuts with a bell flange. The D400G-RAW is unfinished, designed to withstand typical bathroom and kitchen drain environments while providing a strong, leak-resistant seal under standard 1-1/2 inch piping. The tubular design offers a reliable fit and straightforward installation with compatible fittings.
Key points: 17 ga tubular brass, brass slip-joint nuts, bell flange included. A solid option when seeking a sturdy, long-lasting copper/brass P-trap with reliable mechanical connections.
Westbrass A400-1-01 1-1/2″ OD 17 Gauge P-Trap
The Westbrass A400-1-01 is a 1-1/2 inch P-trap with an OD 1-1/2 inch design and 17 gauge construction. It features a high box flange for a clean, finished look under sinks, with standard 1-1/2 inch x 1-1/2 inch dimensions. The approximate length from the center of the neck to the tailpiece is about 11-1/2 inches, making it compatible with many common drain configurations. It is unfinished brass, allowing for custom finishing if required.
Considerations include: high box flange, size compatibility with 1-1/2″ drains, and finish option. Ideal for projects requiring a robust brass P-trap with a clean underside appearance.
Westbrass R400-1-01 1-1/2″ x 1-1/2″ P-Trap with High Box Flange
The R400-1-01 is a standard 1-1/2 inch P-trap with a high box flange. It measures approximately 11-1/2 inches from the neck center to the tailpiece end, matching typical under-sink drain layouts. Built in polished brass, this model balances durability with an aesthetically pleasing finish. The high box flange helps conceal connections for a tidier installation and reduces potential corrosion exposure at the flange.
Westbrass D402LA-RAW 1-1/2″ Brass LA Code P-Trap
Westbrass D402LA-RAW features a 1-1/2 inch FIP inlet with a 1-1/2 inch P-trap inlet. The ground joint trap outlet on the elbow plus 17-gauge cast-brass construction provide durability and reliability for bathroom or kitchen drainage. The unfinished brass surface allows for finishing to match existing fixtures, while ensuring a secure seal and long service life within copper plumbing systems.
Buying Guide: Key Purchase Considerations
- Material and finish: Copper and brass constructions offer natural corrosion resistance. Unfinished finishes give flexibility for matching existing fixtures, while polished brass provides a decorative look in exposed installations.
- Size and compatibility: Ensure the P-trap is 1-1/2 inch and sized for standard sink drains. Check inlet and outlet dimensions (FIP, OD, and tailpiece length) to confirm compatibility with your pipes and fixtures.
- DWV vs. supply use: Choose DWV-rated traps for drainage waste vent systems; ensure fittings and tubing are compatible with your copper DWV piping.
- Installation features: Look for slip-joint nuts, bell flanges, and ground joints that simplify installation and improve leak resistance. A high box flange can improve aesthetics and protection at the connection.
- Durability and service life: Thicker gauge brass and robust slip-nut hardware contribute to longer service life in busy kitchens and bathrooms. Consider units with reinforced joints for high-use areas.
- Maintenance considerations: Copper/brass traps typically resist corrosion but may require occasional tightening or replacement of slip joints to maintain a tight seal over time.
- Ethics and standards: Verify that components meet local plumbing codes and that finishes are lead-free where applicable.
For typical residential installations, any of these 1-1/2 inch copper/brass P-traps provide solid performance with standard fittings. Selection should align with your preferred finish, whether you want a decorative look or a utilitarian unfinished brass for under-sink installations.