We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
MCDONNELL 551-S-HD Water Feeder - Replacement HVACR Pumps, Valves & Tubing
MCDONNELLReplacement HVACR Pumps, Valves & Tubing

MCDONNELL 551-S-HD Water Feeder

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

SKU 3G-OTH-84469

Also listed as: 551SHD · 551 S HD

Brand
MCDONNELL
Item
551-S-HD Water Feeder
Category
Replacement HVACR Pumps, Valves & Tubing
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

MCDONNELL
Manufacturer Part Number
551-S-HD
Product Type
Water Feeder

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

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

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the MCDONNELL & MILLER 551-S-HD water feeder used for?

The MCDONNELL & MILLER 551-S-HD water feeder is used in commercial and industrial hydronic heating systems to automatically maintain proper water levels in boilers. It helps prevent low-water conditions that can cause equipment damage or shutdowns.

What are the specifications of the MCDONNELL & MILLER 551-S-HD water feeder?

The MCDONNELL & MILLER 551-S-HD is a water feeder with manufacturer part number 551-S-HD. It is designed for replacement in HVACR pumps, valves, and tubing applications. For detailed technical specifications, consult the product datasheet or contact 3G Electric.

Where to buy the MCDONNELL & MILLER 551-S-HD water feeder worldwide?

You can source the MCDONNELL & MILLER 551-S-HD water feeder through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.

How to install the MCDONNELL & MILLER 551-S-HD water feeder?

Install the MCDONNELL & MILLER 551-S-HD water feeder by shutting off power and water supply to the boiler. Mount the feeder per manufacturer guidelines, connect piping and wiring, then test for proper operation. Always follow local codes and the product manual.

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.

You might also need

Pump Accessories →Valves & Regulation →Motors & Drives →All Products →

Compatible alternatives & equivalents

Cross-referenced by specification & description
MCDONNELL & MILLER Water Feeder: 51-S-HD Mfr Part #
MCDONNELL
MCDONNELL & MILLER Water Feeder: 51-S-HD Mfr Part #
MCDONNELL & MILLER Water Feeder: 51-S-2-HD Mfr Part #
MCDONNELL
MCDONNELL & MILLER Water Feeder: 51-S-2-HD Mfr Part #
MCDONNELL & MILLER Water Feeder: 51-B-2M Mfr Part #
MCDONNELL
MCDONNELL & MILLER Water Feeder: 51-B-2M Mfr Part #
MCDONNELL & MILLER High Capacity Feeder: 51-S Mfr Part #
MCDONNELL
MCDONNELL & MILLER High Capacity Feeder: 51-S Mfr Part #
MCDONNELL & MILLER Level Control Feeder: 51 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Level Control Feeder: 51 Mfr Part #
MCDONNELL & MILLER Level Control, Head Mechanism: 61-HD Mfr Part #
MCDONNELL
MCDONNELL & MILLER Level Control, Head Mechanism: 61-HD Mfr Part #

More from MCDONNELL

View all MCDONNELL parts →
Low water cut-off control for automatic boiler shutdown when water level drops below safe limits. Designed for use on steam or hot water boilers in HVAC systems. Part number 64
MCDONNELL
Low water cut-off control for automatic boiler shutdown when water level drops below safe limits. Designed for use on steam or hot water boilers in HVAC systems. Part number 64
Electrode assembly for liquid level control in boilers and tanks. Detects conductive fluid levels to initiate pump or alarm functions. Used as a replacement component in commercial and industrial HVACR systems
MCDONNELL
Electrode assembly for liquid level control in boilers and tanks. Detects conductive fluid levels to initiate pump or alarm functions. Used as a replacement component in commercial and industrial HVACR systems
Replacement valve assembly for HVACR systems. Compatible with manufacturer part number 25-A. Used to control fluid flow in heating, ventilation, air conditioning, and refrigeration applications
MCDONNELL
Replacement valve assembly for HVACR systems. Compatible with manufacturer part number 25-A. Used to control fluid flow in heating, ventilation, air conditioning, and refrigeration applications
Replacement long electrode for boiler water-level control systems. Senses water conductivity to regulate pump or burner operation in steam or hot-water boilers
MCDONNELL
Replacement long electrode for boiler water-level control systems. Senses water conductivity to regulate pump or burner operation in steam or hot-water boilers
Replacement body casting for HVACR pumps, valves, and tubing. Compatible with manufacturer part number 157. Directs fluid flow and supports internal components in heating, ventilation, air conditioning, and refrigeration systems
MCDONNELL
Replacement body casting for HVACR pumps, valves, and tubing. Compatible with manufacturer part number 157. Directs fluid flow and supports internal components in heating, ventilation, air conditioning, and refrigeration systems
The MCDONNELL 157S-RL is a low water cut-off with a snap switch, designed to protect boilers and steam heating systems from low water conditions. It automatically interrupts burner operation when water level drops below safe limits, preventing dry-firing and equipment damage. Suitable for HVACR systems requiring water level monitoring and safety shutdown
MCDONNELL
The MCDONNELL 157S-RL is a low water cut-off with a snap switch, designed to protect boilers and steam heating systems from low water conditions. It automatically interrupts burner operation when water level drops below safe limits, preventing dry-firing and equipment damage. Suitable for HVACR systems requiring water level monitoring and safety shutdown
Low water cut-off control for steam and hot water boilers. Automatically shuts off the burner when water level drops below safe point, preventing dry-fire damage. Suitable for commercial and industrial heating systems
MCDONNELL
Low water cut-off control for steam and hot water boilers. Automatically shuts off the burner when water level drops below safe point, preventing dry-fire damage. Suitable for commercial and industrial heating systems
The MCDONNELL 157S-M is a low water cut-off for steam and hot water boilers. It features snap-action, manual-reset operation to shut down the burner when water level drops, protecting against low-water conditions. Suitable for commercial and industrial HVAC systems
MCDONNELL
The MCDONNELL 157S-M is a low water cut-off for steam and hot water boilers. It features snap-action, manual-reset operation to shut down the burner when water level drops, protecting against low-water conditions. Suitable for commercial and industrial HVAC systems