Connects 1/4″ OD RO waste water tubing to standard 1½″–2″ household sink drain pipes. Provides a secure drain outlet for reverse osmosis concentrate lines. Installs above the P-trap.

What it does

This drain valve (also called a drain saddle) clamps onto a standard household 1½″ or 2″ sink drain pipe and accepts 1/4″ OD tubing from the waste/concentrate line of your RO system. It provides a clean, secure connection point for gravity discharge of waste water.

Installation requires drilling a small hole in the drain pipe. The valve is installed above the P-trap so waste water drains by gravity. Suitable for under-sink and countertop RO systems.

Key benefits

• ✓Fits 1½″ and 2″ drain pipes — the two standard US household sizes
• ✓Accepts 1/4″ OD tubing for RO waste water
• ✓Installs above the P-trap for proper gravity drainage
• ✓Durable, corrosion-resistant construction
• ✓Secure, leak-resistant seal when properly installed
• ✓Works with most RO and water filtration systems

Specifications

Compatibility

Often used with

Good to know before you buy

• Install above the P-trap — below it allows sewer gas to enter the drain line.
• Drill a small hole in the drain pipe at the valve location (drill bit typically included or specified in instructions).
• Tighten evenly to create a secure seal against the pipe.
• Connect 1/4″ OD waste tubing to the valve outlet.
• Check for leaks after installation.