Marsh has manufactured a line of steam and boiler heating products since the 1800’s. Quality and functionality is characterized by its line of products. Starting in 2003, the company initiated design and technology enhancements throughout its line.

Marsh Steam announced new product and upgrades throughout its line such as the ability introduced in 2006 to choose from either a diaphragm style or stainless steel bellows style thermostatic heating element in its complete line Steam Trap Products. Marsh is also now producing its new line of bucket traps as well as a wire-less heating element (and insert) into Marsh’s popular R-100 radiator supply valves.

Basic product information includes Air Vents, FT vents, F&T traps, Steam Traps, Bucket Traps and Radiator Valves. Contact M&M Control at 1-800-876-0036 if you have any further requirements or request other information.

Product Line

High Capacity - Steam, Air & Gas Safety Valve


Radiator Valves (Supply/Control Valves)
  • R100  Standard Sizes 1/2 to 2"
    PDF 1  |  PDF 2
  • R-105  Adjustable orifice Sizes 1/2" to 2"
    PDF 1
  • R-200/5   Hydro-Balance 1/2" to 3/4"
    PDF 1
  • R-300  Thermostatically controlled 1/2" to 3/4"
    PDF 1

Float & Thermostatic Traps

Bucket Trap
  • 800 1/2 - 3/4 - 1
    PDF 1

Steam Traps (Thermostatic)

Air Vents (FT vents)

Repair Parts and Repair Kits

Products available (not showing) Contact Marsh
Float only Traps to 2” - Air vents (eliminator) to 1”

Marsh Gauges

Can't find what you are looking for?

Call or email now for immediate Service, Pricing and Delivery


847-356-0566 Tel 847-356-0747 Fax




Blog with M&M Control ServiceFind us on FacebookLinked InX is formerly known as Twitter


WARNING: Some of the products we sell can expose you to chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Contact your sales rep or go to for more information.

All registered trademarks are fully acknowledged by: M&M Control Service, Inc.

M&M Control Service, Inc. does not represent or claim any affiliation, association, connection or approvals with or from any manufacturer unless stated. We fully acknowledge all trademarks and/or names which are pictured and/or listed throughout the M&M Control Service, Inc. Website.

(PowersTM, also known as, POWERS REGULATOR, MCC POWERS, POWERS-FIAT, POWERS PROCESS CONTROLS, CRANE POWERS and POWERS, a Watts Industries Company. The POWERS trademark is owned by Powers, A Division of Watts Water Technologies, Inc. M&M Control Service, Inc. Is a Stocking Distributor for PowersTM)

(All names unintentionally excluded from this list will be included in the next revision upon our notification.)

*This list may vary, as names not appearing on this list are entitled to the acknowledgment of their Trademarks by M&M Control Service, Inc.

Copyright 2024 M&M Control Service Inc., All Rights Reserved

IT Support Services by RIT Company