We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact lead-free brass dual check valve with atmospheric vent, FNPT connections, 180°F max temperature, CSA B6437 certified

Watts

Watts LFN9-3/8 Dual Check with Atmospheric Vent bathware

SKU CH-G8P8-NY10N

A dual-check valve with atmospheric vent prevents back-flow in plumbing systems using lead-free brass construction rated to 180 degrees Fahrenheit

  • TypeTraffic & Parking Lot
  • Lead-free brass body prevents contamination
  • CSA B6437 certified for code compliance
  • Atmospheric vent stops back-siphonage
  • 180 °F maximum temperature rating
  • Dual-check design provides redundant protection

Dual check valve for plumbing systems

This Watts LFN9-3/8 dual check valve includes an atmospheric vent and suits plumbing installations that require backflow prevention. It is designed for use with potable water systems where lead-free components are specified. The valve handles a maximum temperature of 180 degrees Fahrenheit. It meets CSA B6437 standard 6437.

Verify inlet and outlet thread compatibility

Before ordering confirm that your piping uses 3/8 inch FNPT threads on both the inlet and outlet sides. The body height measures 2 3/8 inches and the width is 1 1/4 inches so check available space at the installation point. The valve does not feature auto re-seating so manual inspection after pressure events is necessary.

Lead-free brass body with FNPT connections

The body is constructed from lead-free brass for corrosion resistance and compliance with drinking water regulations. Both connections are female NPT allowing direct threading onto male pipe ends without additional adapters. The atmospheric vent provides air admission to prevent vacuum conditions during system drainage.

Highlights

  • Lead-free brass body prevents contamination
  • CSA B6437 certified for code compliance
  • Atmospheric vent stops back-siphonage
  • 180 °F maximum temperature rating
  • Dual-check design provides redundant protection

Specifications

BrandWATTS
TypeTraffic & Parking Lot

Questions about this item

Does the Watts LFN9-3/8 package include pipe fittings or thread sealant?

The valve has FNPT inlet and outlet threads sized at 3/8 in. Pipe fittings and thread sealant are not included and must be purchased separately.

Which version of the LFN9-3/8 should I choose for a standard potable water line?

This model is a dual check valve with atmospheric vent, lead-free brass body, and CSA B6437 certification. It is the only version listed for 3/8 in FNPT connections.

What does the 180 °F maximum temperature mean for daily hot water use?

The valve is rated for continuous water temperatures up to 180 °F, which covers typical residential hot water systems. Exceeding this limit may damage internal components.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.