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Mueller Steam Specialty Products

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.

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.

Silent Check Valves. Standard Wafer Silent Check Valves in various sizes.

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

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

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.

    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.


    Mason-Dallas, Inc
    2131 Regal Parkway
    Euless TX 76040 US


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