
WATTS
Watts B1156F Bronze Water Feed Regulator 1/2" NPT Threaded Inlet Connection
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Highlights
- PRESSURE REGULATOR: The Watts 1156F Series High Capacity Feed Water Pressure Regulators is for use in commercial and residential hydronic heating systems to fill the boiler and piping system with water, and to maintain water pressure at all times.
- LEAD-FREE BRASS CONSTRUCTION: This pressure regulator has a 1/2" union joint solder inlet and 1/2" NPT female threaded outlet. Product also features a tight seating check valve, manual purge lever, and a stainless steel strainer, making for a complete water feed regulator.
- HIGH PRESSURE RATING: This water pressure regulator is pressure rated to 100 psi (6.9 bar) at a maximum temperature of 212 F (100 C). Made from a durable bronze, this part is built to last and reduces the hassle of deteriorating parts.
- HIGH QUALITY PARTS: This part comes with a bronze body, ensuring exceptional durability and resistance to corrosion. The thermostat is constructed from nylon coated copper. Product also features tamper resistant bonnet screws, and test lever.
- EVERY DROP COUNTS: Water. It's in our name and close to our hearts. Since 1874, Watts Water Technologies has been delivering innovative technologies that make the world's most precious resource safe and accessible. Everything we design is made to keep the Earth's most precious resource safer, cleaner, and more useful for our customers. Our family of brands offers one of the most varied product lines in the world, with world-class, water-related solutions.
Why You'll Love It
- Fills and maintains steady pressure across residential and commercial hydronic heating systems
- Durable corrosion-resistant bronze body paired with lead-free brass construction
- Handles high operating demands up to 100 psi and 212 degrees Fahrenheit
- Built-in stainless steel strainer catches debris to keep the line clear
- Tight-seating check valve helps prevent unwanted backflow
- Integrated manual purge lever and test lever simplify maintenance checks
Pros
- +Durable corrosion-resistant bronze body
- +Built-in stainless steel strainer
- +Rated up to 100 psi and 212 F
- +Integrated manual purge and test levers
- +Lead-free brass construction
Cons
- -Specific union solder inlet requires soldering skills
- -Not suited for systems over 100 psi or 212 F
Detailed Review
The Watts B1156F Bronze Water Feed Regulator is designed for residential and commercial hydronic heating systems. It automatically fills the boiler and piping network with water while keeping the system pressure steady at all times. If you manage a closed hydronic setup, this unit handles continuous pressure regulation in one dedicated valve.
Built around a bronze body with lead-free brass construction, this valve resists corrosion and wear over long-term use. It features a nylon-coated copper thermostat, a tight-seating check valve, and a built-in stainless steel strainer that stops particles from entering the regulator mechanism. It also includes tamper-resistant bonnet screws to secure internal adjustments.
For routine maintenance and setup, the regulator includes both a test lever and a manual purge lever. On the technical side, it operates at pressures up to 100 psi (6.9 bar) and handles water temperatures up to 212 degrees Fahrenheit (100 degrees Celsius). The plumbing connections feature a 1/2-inch union joint solder inlet paired with a 1/2-inch NPT female threaded outlet.
Keep in mind that the inlet uses a solder union connection, which requires soldering during installation rather than a purely threaded screw-in attachment on both ends. It is also strictly limited to operating environments that stay within its 100 psi and 212-degree maximum thresholds.
Verdict: The Watts B1156F is a dependable choice for anyone servicing or installing commercial or residential hydronic heating systems. Its solid bronze build and integrated strainer provide reliable water regulation within standard operating limits.
Specifications
- Body Material: Bronze and lead-free brass
- Inlet Connection: 1/2-inch union joint solder
- Outlet Connection: 1/2-inch NPT female threaded
- Maximum Pressure: 100 psi (6.9 bar)
- Maximum Temperature: 212 F (100 C)
- Internal Components: Stainless steel strainer, nylon-coated copper thermostat, tight-seating check valve
Who Should Buy It
A great fit if you:
- Need to regulate water pressure in a residential or commercial hydronic boiler system
- Want a durable bronze regulator with an integrated check valve and debris strainer
- Have a setup that uses a 1/2-inch solder inlet and 1/2-inch NPT threaded outlet
- Require a unit with built-in purge and test levers for system servicing
Consider something else if you:
- Need threaded connections on both the inlet and outlet
- Operate a high-temperature system exceeding 212 degrees Fahrenheit
- Require working pressures higher than 100 psi
FAQ
What types of connections does this regulator use?
It is equipped with a 1/2-inch union joint solder inlet and a 1/2-inch NPT female threaded outlet.
What are the maximum pressure and temperature limits?
The regulator is rated for a maximum pressure of 100 psi (6.9 bar) and a maximum temperature of 212 degrees Fahrenheit (100 degrees Celsius).
What materials are used to construct this valve?
The regulator features a bronze body, lead-free brass construction, a stainless steel strainer, and a nylon-coated copper thermostat.
Does this unit include a purge function?
Yes, it comes equipped with a manual purge lever as well as a test lever.
Product Details
| Brand | WATTS |
| ASIN | B00918PU0M |






