Marlin N.L.A. Anti-siphon Ballcock 12 Inches

Product Description

The MARLIN N.L.A. is an anti-siphon ballcock designed for toilet tank fill valve applications. It controls water flow into the toilet tank after each flush cycle and incorporates an anti-siphon feature that prevents backflow contamination of the potable water supply. At 12 inches in height, this ballcock suits standard residential and light commercial toilet installations. Plumbers and plumbing contractors are the primary trade installing this component during new construction, retrofit, or repair service calls.

This ballcock is suited for residential and light commercial toilet tank installations where a 12-inch fill valve height is required. It is typically installed in standard two-piece toilet tanks as a replacement or new-construction fill valve. The anti-siphon design meets backflow prevention requirements common to municipal potable water systems, making it appropriate for use where local plumbing codes mandate backflow protection at the fixture level.

Key Features

• Anti-siphon design prevents backflow and protects potable water supply
• 12-inch height accommodates standard residential toilet tank dimensions
• Fill valve function refills toilet tank automatically after each flush cycle
• Suitable for new construction and replacement applications

Compatibility

Designed as an OEM-style replacement for standard residential and light commercial toilet tank fill valve applications requiring a 12-inch anti-siphon ballcock.

Installation Notes

Installation is performed by a licensed plumber. Shut off the water supply at the fixture stop valve and flush the toilet to empty the tank before beginning work. Follow local plumbing code requirements, which may reference IPC or equivalent standards for backflow prevention and fill valve installation. Do not overtighten the tank nut securing the ballcock shank, as cracking the tank is a common installation error.

Technical Specifications

• Height: 12 inches
• Type: Anti-Siphon Ballcock

Standard Information

• Brand: MARLIN
• Manufacturer Part Number: N.L.A.