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Brass and stainless steel water hammer arrestor with 1/2 inch NPT connection

Watts

Watts LF150A Water Hammer Arrestor 1/2" NPT 150 psi Brass Stainless Steel

SKU CH-73MW-8E99T

A 1/2" NPT brass and stainless steel water hammer arrestor rated to 150 psi max pressure with a 30 psi factory set pressure, operating from 33 to 180 °F

  • Size1/2 in
  • Product typePipes, Valves & Fittings
  • Stops pipe banging with brass and stainless steel construction
  • 1/2 inch NPT connection fits standard plumbing lines
  • Factory set at 30 psi for immediate protection
  • Handles up to 150 psi maximum working pressure
  • Operates reliably from 33 to 180 degrees Fahrenheit

Brass Water Hammer Arrestor

The Watts LF150A is a 1/2 inch NPT water hammer arrestor built with a brass body and stainless-steel components. It absorbs pressure surges in residential and light-commercial plumbing systems to protect piping and fixtures from shock damage.

For Copper or Steel Pipe Systems

This arrestor suits installers working with 1/2 inch male NPT connections on copper or steel pipe networks operating up to 150 psi. It is not intended for systems that require a larger connection size, a different thread standard, or pressure ratings above the stated maximum.

Installs Inline Near Fixtures

The unit threads directly onto a 1/2 inch NPT branch line close to quick-closing valves, requiring no external power or control wiring. Its factory pre-charge of 30 psi is ready for service across a 33 to 180 degrees Fahrenheit temperature range, freeing the system from hammer noise without adding moving parts to maintain.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $90.99
Pricier than about 84% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameWATTS
Product typePipes, Valves & Fittings
Size & build
Size1/2 in

Questions about this item

What 1/2 inch NPT connection do I need on my plumbing for this arrestor to thread into?

The arrestor has a 1/2 inch MNPT connection that threads directly into a matching 1/2 inch female NPT fitting on your water line.

Will the 150 psi maximum pressure rating handle pressure spikes in my existing copper pipe system?

Yes, the brass and stainless steel body is rated for a maximum pressure of 150 psi, suitable for standard residential supply lines.

How can I confirm the factory set pressure of 30 psi is active after installation?

Operate a fixture to create flow, then close it sharply; the arrestor should absorb the shock silently if the 30 psi cushion is working.

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