ENGINEERED & MANUFACTURED IN GRAND RAPIDS

Steam and hydronic equipment built to outlast the building.

Centrifugal pumps, steam traps, regenerative turbines and hydronic specialties — proven in hundreds of thousands of installations since the first thermostatic trap in 1903.

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RC SERIES CLOSE-COUPLED · MOTOR → BRACKET → SEAL → IMPELLER → CASING
1903first thermostatic trap 8M+products installed 50states + Canada
PRODUCT LINES

Eight families, one foundry

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MADE IN Grand Rapids, Michigan, USA
CONTINUOUS PRODUCTION Since 1903
PUMPS Hydraulic Institute standards
TANKS & SEPARATORS ASME Section VIII stamped
LEGACY SUPPORT Dunham-Bush cross-references honored
SALES Factory direct · 57 rep offices
SELECTION TOOLS

Size it before you call

The tools reps and engineers use every day — no login, and every result hands off to a quote.

MEP-FLOW© Pump selection Flow and head in; every fitting MEPCO pump out, with curve, BEP, motor and operating cost. Open MEP-FLOW → STEAM TRAP SELECTOR Trap type & size Application, pressures and load in; trap type, safety factor and connection size out — with the reasons. Select a trap → MODEL DECODER What's on the nameplate Type a MEPCO or Dunham-Bush model number — get the family, size, motor and the right parts manual. Decode a model →
SINCE 1903

The industry's oldest line of designs, still poured and machined in Michigan.

Our brass foundry once cast trap and valve bodies; today it also pours pump impellers machined to specifications still exclusive to MEPCO. Every rep you call has been trained in the science of steam.

Our history →
archival photo — foundry floor or early Dunham plant
DEALER NETWORK

Talk to someone who knows steam

Independent sales offices in all 50 states, Canada, Mexico and the Caribbean — many for multiple generations.

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COMMON QUESTIONS

Before you call

Buying, selecting and repairing MEPCO equipment — the questions our inside sales desk answers most.

All questions
How do I buy MEPCO products?

MEPCO sells through independent sales representatives across the U.S., Canada, Mexico and Puerto Rico, and factory-direct where no office covers a territory. Enter your ZIP in Find a rep, or request a quote and it routes to the covering office automatically.

Which steam trap do I need?

It depends on the application more than the brand: thermostatic for radiators and convectors, float & thermostatic for coils and heat exchangers under modulating pressure, inverted bucket for steam-main drips, thermodynamic for tracers and outdoor lines. The trap selector applies those rules to your pressures and load and returns a type and connection size.

Do MEPCO parts fit Dunham-Bush traps and pumps?

Yes. MEPCO continues the Dunham and Dunham-Bush steam specialty and pump designs, and current cage units, repair kits and pump parts cross-reference to the legacy model numbers. Enter the old number in the decoder or search, or send us a nameplate photo.

How do I size a pump?

Use MEP-FLOW: enter flow in GPM and head in feet and it returns every MEPCO pump that fits, with the curve, best-efficiency point, motor size and operating cost. Print the curve sheet or send it straight to a quote.