Watts 386419 Feed Water Pressure Regulator 1/2 in

Product Description

The WATTS 386419 is a bronze, dial-set feed water pressure regulator in the BD1156F series, designed to fill boiler and hydronic system piping with water and maintain system pressure at all times. This valve provides automatic make-up water when system leaks cause pressure to drop, keeping the boiler loop properly charged. It features a push-button fast fill mode with auto-stop that halts flow at 25 psi to prevent over-pressurizing the system. Factory set at 15 psi, with a field-adjustable range of 8 to 21 psi, the dial indicator allows visual confirmation of setpoint within plus or minus 2 psi. Licensed plumbers and heating contractors install this valve during new boiler installations and service calls.

The WATTS 386419 suits residential and light commercial hydronic heating systems, including hot water boilers and closed-loop heating circuits. The 1/2 inch union threaded end connections allow for straightforward in-line installation and removal without disturbing adjacent piping. It is appropriate for systems operating within standard low-pressure hot water boiler parameters and is rated for water service up to 212 degrees F and 100 psi maximum working pressure.

Key Features

• Push-button fast fill engagement with auto-stop at 25 psi prevents system over-pressurization
• Factory set at 15 psi with field-adjustable range of 8 to 21 psi
• Dial indicator provides visual setpoint reference with plus or minus 2 psi accuracy
• Bronze construction suited for potable and heating water service
• 1/2 inch union threaded connections allow removal without cutting pipe
• Rated for maximum working pressure of 100 psi and maximum temperature of 212 degrees F

Compatibility

Designed as an OEM-style replacement or new-installation feed water regulator for residential and light commercial closed-loop hot water boiler systems using 1/2 inch threaded piping connections.

Installation Notes

Installation should be performed by a licensed plumber or heating contractor in accordance with local plumbing codes and the system manufacturer's guidelines. Shut off the water supply and depressurize the system before removing or installing the valve. Union connections allow the regulator to be isolated and swapped without cutting into the supply line. Verify system pressure at startup using a calibrated gauge and confirm the dial indicator reading before returning the boiler to service.

Technical Specifications

• Connection Size: 1/2 inch
• Connection Type: Union Threaded
• Body Material: Bronze
• Maximum Temperature: 212 degrees F
• Maximum Working Pressure: 100 psi
• Adjustment Range: 8 to 21 psi
• Fast Fill Auto-Stop Pressure: 25 psi
• Dial Indicator Accuracy: plus or minus 2 psi
• Factory Set Pressure: 15 psi

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 386419