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Xylem 150S-HD Replacement Head Mechanism with Snap Switch Boiler Safety Controls & Aquastats

Manufacturer

Picture for manufacturer Xylem

Part Number

150S-HD
8 reviews
Sale Price

$1,081.73

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Xylem 150S-HD is a replacement head mechanism assembly designed for use with McDonnell & Miller Series 150S low water cut-off and pump controller systems. This critical component features a snap-acting SPDT (Single Pole, Double Throw) switch for reliable boiler control and safety operations.

Key Features:

  • Replacement head assembly for Series 150S controls (OEM Part Number 173003)
  • Snap-acting SPDT switch mechanism for high-temperature service
  • Heavy-duty construction for industrial and commercial boiler applications
  • Compatible with systems rated up to 150 psi maximum pressure
  • Designed for both low water cut-off and pump control functions

This head mechanism is engineered for commercial and industrial steam boiler applications where reliable low water protection is essential. The snap-action switch design ensures positive switching for enhanced safety and control accuracy. McDonnell & Miller recommends replacing head mechanisms every 5 years as part of routine boiler maintenance to ensure continued reliable operation and system safety.

Received in timely manner as ordered. The product is as described. The cheapest Monroe reflex shocks for my Jeep in the entire internet. Very pleased. Many thanks.

Easy to order

Ok

Easy to use

THMotorsports had the part I needed in stock, unlike other suppliers. The price was good and it shipped quickly. I will shop here again.

Everything was easy, but paid for two-day shipping and I didn't receive the items for over 3 weeks.

Great and speedy service everytime I order.

Great prices fast amd free shipping

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