State Supply is a master wholesale distributor for ITT McDonnell-Miller boiler controls, flow control valves and repair parts. Huge inventory of products and parts all ready for same-day shipping at wholesale prices!

Boiler Controls and Repair Parts Flow Switches & Repair Parts

New McDonnell-Miller 150E and 157E Pump Control and Low Water Cut-off

• Reliable and Rugged solid circuitry control box with probe controls - No more float! Compensates for rapidly changing boiler water levesl. No more false cut-offs!
• Prevents rapid burner and pump cycling. No more nuisance level signals.
• Go to McDonnell-Miller 150E and 157E section of the catalog.

Get replacement head assemblies for your current 150 pump controls and low water cut-offs. FREE same-day UPS Ground! 21-day "no hassle" returns

• Includes the 150S-HD. The "mercury free" head assembly.
• The easy and confident way to repair the 150 series of controllers
• Go to McDonnell-Miller 150 Series catalog section.

McDonnell-Miller Flow Switches and Replacement Components

• BIG selection of McDonnell-Miller flow switches and repair parts
• Most flow switches and parts in-stock at wholesale prices
• On-the-shelf ready for FREE UPS Ground on all orders over $299.00
• Go to McDonnell-Miller Flow Switch catalog section.

McDonnell-Miller 25A Water Feeder and Replacement Head Assembly

• A leading water feeder in use in thousands of facilities around the world!
• Order the complete unit, the replacement head assembly or the repair parts
• On-the-shelf ready for FREE UPS Ground on all orders over $299.00
• Go to McDonnell-Miller 25A Water Feeder catalog section.

McDonnell-Miller Model 63 Low Water Cut-Offs and Replacement Head Assembly

• Popular boiler control jam-packed on our shelves, ready for same-day shipping!
• Available in automatic reset (No. 63) or manual reset (No. 63M) models.
• Go to McDonnell-Miller Model 63 Low Water Cut-Off catalog section.