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MCDONNELL & MILLER Water Feeder: 51-S-2-HD Mfr Part # - Replacement HVACR Pumps, Valves & Tubing
MCDONNELLReplacement HVACR Pumps, Valves & Tubing

MCDONNELL & MILLER Water Feeder: 51-S-2-HD Mfr Part #

MCDONNELL Replacement HVACR Pumps, Valves & Tubing. Specifications: Product Type: Water Feeder.

SKU 3G-OTH-79551

Also listed as: 51S2HD · 51 S 2 HD

Brand
MCDONNELL
Item
& MILLER Water Feeder: 51-S-2-HD Mfr Part #
Category
Replacement HVACR Pumps, Valves & Tubing
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

MCDONNELL
Manufacturer Part Number
51-S-2-HD
Product Type
Water Feeder

Technical Documents

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MCDONNELL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

MCDONNELL Replacement HVACR Pumps, Valves & Tubing. Specifications: Product Type: Water Feeder.

Frequently Asked Questions

What is the MCDONNELL & MILLER 51-S-2-HD water feeder used for?

The MCDONNELL & MILLER 51-S-2-HD water feeder automatically maintains water level in low-pressure steam boilers and hydronic heating systems. It is a replacement part for HVACR pumps, valves, and tubing, ensuring safe boiler operation by adding water when levels drop.

What are the specifications of the MCDONNELL & MILLER 51-S-2-HD water feeder?

The MCDONNELL & MILLER 51-S-2-HD is a water feeder with manufacturer part number 51-S-2-HD. It is classified as a replacement HVACR pump, valve, and tubing component. For detailed technical data such as pressure ratings or connection sizes, consult the product datasheet.

Where to buy the MCDONNELL & MILLER 51-S-2-HD water feeder worldwide?

3G Electric supplies the MCDONNELL & MILLER 51-S-2-HD water feeder worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the MCDONNELL & MILLER 51-S-2-HD water feeder?

Install the MCDONNELL & MILLER 51-S-2-HD water feeder by isolating the boiler, draining below the feeder connection, and mounting it per manufacturer guidelines. Ensure proper electrical wiring and test for leaks. Always follow local codes and the OEM manual for safe operation.

Used in

Common applications for MCDONNELL
Steam boiler low-water cutoff — McDonnell & Miller 61 level control
Condensate receiver level monitoring — McDonnell & Miller RS-4-BR-1 4-level sensor
HVACR pump suction filtration — McDonnell & Miller 340700 strainer basket assembly
Flow switch head replacement — McDonnell & Miller 63-HD head mechanism
Boiler control circuit safety — McDonnell & Miller 7-BM electrical switch with manual reset
Field servicing of flow switches — McDonnell & Miller 310452 cartridge kit

MCDONNELL Products

3G Electric supplies MCDONNELL replacement hvacr pumps, valves & tubing. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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