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Mueller Steam Specialty

Mason-Dallas is proud to offer Mueller Steam Specialty products. Mueller is the world’s largest supplier of strainers and the number one provider of specialty products serving the valve industry.


Click for Mueller Suction Diffusers
Suction Diffusers. Provides economical and compact pump protection by straining foreign particles and providing proper flow conditions to the pump. This series mounts directly to the suction side of a pump in either the horizontal or vertical position.

Click for Mueller Silent Check Valves
Silent Check Valves. Standard Wafer Silent Check Valves in various sizes.


Click for Mueller Control Check Valves
Control Check Valves. Designed for installation in pump discharge piping where it performs triple duty. It acts as a spring loaded silent check valve, a shutoff valve, and a balancing valve. Used in conjunction with the Mueller Steam Specialty suction diffuser, it constitutes a compact and effective complete pump protection and isolation package


Click for Mueller Tee Strainers
Vertical Radiator Steam Vents. Single-port, straight-shank vent for small steam systems. Angle cut of telescopic siphon assures positive drainage.

  • Size Connection: 41 1/8″ Straight shank
  •       43 1/4″ Straight shank
  •       45 1/2″ Female x 3/4″ male straight shank
  • Maximum Pressure: 10 PSI

Click for Mueller Turbine Meter Strainer
Auto Vent 670. Maid-O’-Mist’s new No. 670 forged brass Auto-Vent is an ideal automatic vent for hydronic heating applications. With the highest capacity rating available for a forged air vent in the 35-50 psi range, a No. 670 Auto-Vent will relieve air much faster than any comparable automatic vent.

Click for Mueller Chexster Check Valves
Auto Vent 675. The Auto-Vent 675 purges and eliminates air in water lines, installs vertical at highest points on line. A low cost, low profile vent valve made of forged brass with a Polypropylene float with a 1/8 NPT connection – Great for places where height restrictions are an issue! “Only 1 ½ inches in height.


Click for Mueller Suction Diffusers
Suction Diffusers. Provides economical and compact pump protection by straining foreign particles and providing proper flow conditions to the pump. This series mounts directly to the suction side of a pump in either the horizontal or vertical position.

Click for Mueller Silent Check Valves
Silent Check Valves. Standard Wafer Silent Check Valves in various sizes.


Click for Mueller Control Check Valves
Control Check Valves. Designed for installation in pump discharge piping where it performs triple duty. It acts as a spring loaded silent check valve, a shutoff valve, and a balancing valve. Used in conjunction with the Mueller Steam Specialty suction diffuser, it constitutes a compact and effective complete pump protection and isolation package


Click for Mueller Tee Strainers
Vertical Radiator Steam Vents. Single-port, straight-shank vent for small steam systems. Angle cut of telescopic siphon assures positive drainage.

  • Size Connection: 41 1/8″ Straight shank
  •       43 1/4″ Straight shank
  •       45 1/2″ Female x 3/4″ male straight shank
  • Maximum Pressure: 10 PSI

Click for Mueller Turbine Meter Strainer
Auto Vent 670. Maid-O’-Mist’s new No. 670 forged brass Auto-Vent is an ideal automatic vent for hydronic heating applications. With the highest capacity rating available for a forged air vent in the 35-50 psi range, a No. 670 Auto-Vent will relieve air much faster than any comparable automatic vent.

Click for Mueller Chexster Check Valves
Auto Vent 675. The Auto-Vent 675 purges and eliminates air in water lines, installs vertical at highest points on line. A low cost, low profile vent valve made of forged brass with a Polypropylene float with a 1/8 NPT connection – Great for places where height restrictions are an issue! “Only 1 ½ inches in height.