Watts 36044 Vertical Bronze Thermostatic Radiator Trap

Product Description

The WATTS 36044 is a vertical-mount, cast bronze thermostatic radiator steam trap designed for low-pressure steam heating systems. Sold under the Illinois model designation 1VG, this trap features a 1/2-inch connection and operates on a thermostatic element that responds directly to temperature changes in the line. When steam is present, the element expands and closes the trap. When cooler condensate or air is present, the element contracts and opens the trap, allowing drainage. Maximum operating pressure is 25 psi, with a rated condensate capacity of 880 pounds per hour. The vertical body orientation suits a range of residential and light commercial radiator piping configurations. Licensed plumbers and steam heating technicians are the typical installers.

The 36044 is suited for low-pressure steam heating systems where reliable condensate discharge and air venting are required at individual radiators. The vertical mounting pattern accommodates installations where horizontal trap placement is not practical. Its cast bronze body withstands the thermal cycling common in steam radiator service. The thermostatic operating principle makes it well matched to systems that cycle frequently or operate at variable loads, as the trap responds passively to temperature rather than requiring float or bucket mechanisms.

Key Features

• Thermostatic element opens on condensate and air, closes on live steam
• Cast bronze body for corrosion resistance in steam service
• Vertical mounting pattern for flexible installation positioning
• 1/2-inch trap connection size
• 25 psi maximum operating pressure
• 880 lb/h condensate capacity

Compatibility

Designed as an OEM-style replacement or new-installation thermostatic steam trap for low-pressure residential and light commercial steam radiator heating systems with 1/2-inch trap connections.

Installation Notes

Steam traps of this type are installed by licensed plumbers or steam heating technicians familiar with low-pressure steam systems. Shut off the steam supply and allow the system to depressurize and cool fully before removing or installing any trap. Verify pipe thread engagement and use appropriate thread sealant rated for steam service. Consult applicable local plumbing codes and ASME guidelines for low-pressure steam piping before placing the system back in service.

Technical Specifications

• Steam Trap Type: Thermostatic
• Body Material: Bronze
• Connection Size: 0.5 inches
• Mounting Orientation: Vertical
• Maximum Operating Pressure: 25 psi
• Condensate Capacity: 880 lb/h
• Weight: 1.40 pounds

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 36044