Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

MCDONNELL & MILLER Level Control Switch: 42S Mfr Part # - Replacement HVACR Pumps, Valves & Tubing
MCDONNELLReplacement HVACR Pumps, Valves & Tubing

MCDONNELL & MILLER Level Control Switch: 42S Mfr Part #

MCDONNELL Replacement HVACR Pumps, Valves & Tubing. Specifications: Product Type: Level Control.

SKU 3G-OTH-77246

Brand
MCDONNELL
Item
& MILLER Level Control Switch: 42S Mfr Part #
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 — 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
42S
Product Type
Level Control

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: Level Control.

Frequently Asked Questions

What is the MCDONNELL & MILLER 42S level control switch used for?

The MCDONNELL & MILLER 42S level control switch is used in HVAC and industrial systems to monitor and control liquid levels in boilers, tanks, and receivers. It helps prevent low-water conditions that can damage equipment, ensuring safe and reliable operation in commercial and industrial applications.

What are the specifications of the MCDONNELL & MILLER 42S level control switch?

The MCDONNELL & MILLER 42S is a level control switch with manufacturer part number 42S. It is designed for use in HVACR systems to manage liquid levels. For detailed technical specifications such as pressure ratings, temperature limits, and electrical ratings, consult the product datasheet or contact 3G Electric.

Where to buy the MCDONNELL & MILLER 42S level control switch worldwide?

You can source the MCDONNELL & MILLER 42S level control switch 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; we supply this part to customers across multiple industries.

How to install the MCDONNELL & MILLER 42S level control switch?

Install the MCDONNELL & MILLER 42S level control switch according to the manufacturer's instructions. Typically, mount it in the boiler or tank at the desired level, connect the electrical wiring per local codes, and verify proper float movement. Always isolate power before installation and consult a qualified technician for safe setup.

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 Level Control Head Mechanism: 42S-HD Mfr Part #
MCDONNELL
MCDONNELL & MILLER Level Control Head Mechanism: 42S-HD Mfr Part #
MCDONNELL & MILLER Level Control: 63-M Mfr Part #
MCDONNELL
MCDONNELL & MILLER Level Control: 63-M Mfr Part #
MCDONNELL & MILLER Level Control: 193-A Mfr Part #
MCDONNELL
MCDONNELL & MILLER Level Control: 193-A Mfr Part #
MCDONNELL & MILLER Level Control: 61 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Level Control: 61 Mfr Part #
MCDONNELL & MILLER Level Control Switch: 247-2 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Level Control Switch: 247-2 Mfr Part #
MCDONNELL & MILLER Level Control Feeder: 51-2 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Level Control Feeder: 51-2 Mfr Part #

More from MCDONNELL

View all MCDONNELL parts
MCDONNELL & MILLER Casting: 193-1 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Casting: 193-1 Mfr Part #
MCDONNELL & MILLER Head Mechanism: 25A-HD Mfr Part #
MCDONNELL
MCDONNELL & MILLER Head Mechanism: 25A-HD Mfr Part #
MCDONNELL & MILLER Valve Assembly: 342500 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Valve Assembly: 342500 Mfr Part #
MCDONNELL & MILLER Casting: 150-1 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Casting: 150-1 Mfr Part #
MCDONNELL & MILLER Float Bellows Assembly: 344200 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Float Bellows Assembly: 344200 Mfr Part #
MCDONNELL & MILLER Make-Up Feeder: 21 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Make-Up Feeder: 21 Mfr Part #
MCDONNELL & MILLER Bellows Base Assembly: 343500 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Bellows Base Assembly: 343500 Mfr Part #
MCDONNELL & MILLER Large Bellows: 341900 Mfr Part #
MCDONNELL
MCDONNELL & MILLER Large Bellows: 341900 Mfr Part #