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149 CONGRESS ST, LOWELL
(800) 929-9101
Plumbing, Heating & Steam Division • (978) 454-7606 • PVF@goindustrialsupplies.com COMMBUYS FAC124 (#201354) • MHEC G14 (#374)

Commercial Boiler Rooms, Steam Trap Cage Units & Hydronic Heating Projects

Turnkey boiler room component staging, drop-in Barnes & Jones steam trap cage unit conversions, ITT McDonnell & Miller low-water cutoffs, Bell & Gossett / Taco circulators, and in-house up-to-4" NPT steam header fabrication in Lowell, MA.

Specialized Steam & Hydronic Engineering Silos

Select Your Boiler Room or Steam System Discipline

Need Custom 2"–4" Threaded Steam Headers? Visit Our Pipe Shop →
Master Boiler Room Reference 01

New England Commercial Steam & Hydronic Component Cross-Reference Matrix

Core replacement components stocked and cross-referenced at 149 Congress Street, Lowell for municipal schools, hospitals, housing authorities, and industrial plants.

System Subsystem Primary OEM Manufacturers Key Models & Assemblies Stocked Operating Pressure / Rating Diagnostic Symptom of Failure
Radiator & Convectors Traps Barnes & Jones, Hoffman, Dunham, Webster, Marsh Drop-In Calibrated Cage Units (1/2", 3/4", 1"), #17C, #8, #9 0–15 PSIG Low-Pressure / Vacuum Steam Steam venting from condensate receiver; return pipes >180°F; cold radiator with failed-closed bellows
Main Drip & Heat Exchanger Traps Spirax Sarco, Armstrong, ITT Hoffman FT-15, FT-30, FT-75, FT-125 (F&T) & Armstrong 800/811/812 Bucket 15, 30, 75, 125 & 150 PSIG Orifices Water hammer in steam mains; flooded unit heater coils; live steam blowing past eroded orifice
Boiler Low-Water Cutoffs & Feeders ITT McDonnell & Miller, Hydrolevel #67, #47-2, #63, #150S / #157S (150 PSI), RB-122E, PSE-801, #101A, WF-2 15–20 PSIG (Steam) / Up to 150–160 PSIG (HP/Water) Burner fails to cut out during slow blowdown test; flooded boiler from leaking feeder cartridge
Hydronic Circulators & Bearing Assemblies ITT Bell & Gossett, Taco, Grundfos B&G Series 100 (#106189), HV, NRF/PL, Bearing #118844/#189100; Taco 007e–0014, 110–1600 125–175 PSIG Working Pressure • Up to 225°F–250°F Sheared spring coupler from sagging rubber motor mounts; weeping mechanical shaft seal; locked wet-rotor cartridge
ASME Safety & Relief Valves Watts, Conbraco / Apollo, Kunkle Valve ASME Section IV Steam (15 PSIG 'V') & Hot Water (30–125 PSIG 'HV'); Section I/VIII 'UV' 15 PSIG Steam / 30–300 PSIG Water, Air & Process Steam Weeping discharge pipe caused by waterlogged expansion tank or scale under valve disc
Custom Threaded Header Piping Wheatland Tube, Ward, Anvil, Merit Brass In-House Cut & Threaded Sch 40 & Sch 80 Black Steel Nipples/Headers (1/8" to 4" NPT) ASME B1.20.1 Tapered NPT + Class 125/250 Cast Iron Steam Fittings Rusted-thin equalizer drops, wet returns, and Hartford Loop nipples requiring exact-length replacement
522 CMR & CSD-1 Facility Maintenance Protocol

Pre-Winter Boiler Room & Steam Header Readiness Checklist

  1. Inspect & Flush Float Low-Water Cutoffs (#67 / #47-2 / #150S): Pull the float head assembly to clear mud/scale from the float bowl, replace the head gasket (never reuse compressed gaskets), and verify snap-switch continuity under a live slow-drain test.
  2. Infrared Audit of Radiator & Main Drip Steam Traps: Scan condensate return drops with an infrared thermometer or ultrasonic tester. Any low-pressure return line reading above 180°F–190°F indicates a blown-open trap that can be renewed quickly without disturbing aged piping using a Barnes & Jones Cage Unit.
  3. Verify Hydronic Expansion Tank Pre-Charge & Air Eliminators: Isolate Amtrol Extrol bladder/diaphragm tanks, check the Schrader air pre-charge against cold static fill pressure (typically 12–30 PSI), and replace fouled Hy-Vent / Hoffman float vents.
  4. Lubricate 3-Piece Circulators & Inspect Motor Mounts: Add 5–10 drops of SAE 20/30 non-detergent oil to Bell & Gossett Series 100 / HV bearing assemblies and motor cups; keep a spare coupler (#118705) and bearing assembly (#118844) on the boiler room shelf.
In-House 4" Pipe Fabrication

Replacing a Boiler Header or Hartford Loop?

Don't haul a 300-pound tripod power threader and oiler bucket down a narrow boiler room staircase for four pieces of 2-1/2" or 3" Schedule 40/80 black steel pipe.

Call your cut list in to (978) 454-7606 (PVF@goindustrialsupplies.com). We cut, ream, and thread Schedule 40 and Schedule 80 black steel, galvanized, and brass pipe up to 4" NPT right at 149 Congress Street—staged with companion Class 125/250 cast-iron steam fittings and malleable unions.

Explore Our 4" Pipe Threading Shop →
Boiler Room & Steam Engineering Q&A

Frequently Asked Questions: Steam Traps, Boilers & Hydronics

How do I get the right Barnes & Jones drop-in cage unit if the radiator trap has no model numbers left on it?

Simply unscrew the brass trap cap and bring the cap and old internal element (or the complete trap body) to our Plumbing & Steam Counter at 149 Congress Street in Lowell. Our counter specialists measure the cap thread OD, threads per inch, cap-to-seat depth, and seat bore against our master Barnes & Jones cross-reference templates to match any trap made since 1910.

Can public schools and municipalities purchase boiler controls and steam traps under COMMBUYS or MHEC?

Yes. All commercial boiler parts, steam traps, circulators, valves, and custom-threaded pipe are eligible under Massachusetts Statewide Contract FAC124 (COMMBUYS Vendor #201354, MBPO PO-23-1080-OSD03-SRC3-30757) and MHEC Contract G14 (Vendor #374 — Plumbing, Heating, Fixtures & Service) with 2%–10 Days / 1%–15 Days prompt payment discounts.

Why must cast-iron steam fittings (Class 125) be used on steam condensate lines instead of galvanized malleable fittings?

Steam condensate contains dissolved carbonic acid and oxygen that rapidly corrodes thin-wall pipe threads, and zinc coatings on galvanized fittings flake off in high-temperature steam condensate and clog steam trap orifices and strainers. Schedule 80 black steel pipe paired with heavy-wall Class 125/250 cast-iron steam drainage fittings provides maximum corrosion allowance and thread engagement.

149 CONGRESS ST, LOWELL, MA • TRADE COUNTER & MUNICIPAL DESK COMMBUYS #201354 • MHEC G14 / G19

Stage a Commercial Boiler, Steam Trap or Hydronic Project

Send your boiler room BOM, steam trap survey, or custom header pipe cut list to (978) 454-7606 (PVF@goindustrialsupplies.com).

Direct Counter Routing (Mon–Fri 7:00 AM – 4:00 PM) •