1/2" Watts LF601S Soft Seated Check - Sweat

Item Number: 0555181
1 1
$166.13
Limited Stock (1)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • Size: 1/2 inch
  • Weight: 12.9 lb
  • End Connections: Solder
  • Body Material: Lead Free* Cast Copper Silicon Alloy
  • Disc Material: Viton®
  • Maximum Working Pressure: 250 PSI @ 100°F
  • Prevents water hammer with silent operation
  • Install: Horizontal or vertical with upward flow
  • Lead Free* construction

Description

This 1/2 inch Watts LF601S Silent Check Valve with solder end connections is engineered for efficient prevention of water hammer in plumbing and industrial systems. Featuring Lead Free* cast copper silicon alloy construction and a Viton® disc, it ensures silent operation and durability. The valve is designed for low pressure drop and can be installed horizontally or vertically with upward flow. It offers a maximum working pressure of 250 PSI at 100°F (38°C) and complies with reduced lead content standards. This non-testable check valve is a reliable solution for mitigating fluctuating pressure in various applications.

Help Me Connect

Connecting the Watts LF601S Silent Check Valve

This LF601S model features solder end connections, specifically designed for soft soldering into piping lines. For optimal performance and to prevent seat damage, it is crucial to use a low temperature solder, ideally around 420°F (216°C). While other solders like 95/5 tin antimony (460°F) or 96/4 tin silver (430°F) can be used, extreme caution must be exercised as higher temperatures can damage the valve's seat material. Always apply heat with the flame directed AWAY from the center of the valve body.

ANSI B16.18 standards indicate that the maximum operating pressure for 50-50 solder connections is 200 psi (13.8 bars) at 100°F (38°C), and this pressure rating decreases with higher temperatures.

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Additional Details

The 1/2 inch Watts Series LF601S Silent Check Valve with solder end connections is designed to efficiently prevent the damaging effects of water hammer in piping systems while operating silently. Its Lead Free* construction complies with modern reduced lead content requirements, making it suitable for general industrial and plumbing applications.

This valve can be installed in either a horizontal or vertical position with upward flow, providing a reliable and low-pressure drop solution.

Features

  • Silent operation to prevent water hammer
  • Lead Free* cast copper silicon alloy body for durability and compliance
  • Integral Lead Free* copper silicon alloy seat
  • Viton® disc for reliable sealing
  • Designed for low pressure drop
  • Can be installed in horizontal or vertical position with upward flow

NOTICE: These valves are not suggested for installation in sewage ejector piping or for reciprocating air compressor service.

Specifications

  • Product Type: Silent Check Valve
  • Model: LF601S
  • Size: 1/2 inch
  • End Connections: Solder
  • Body Material: Lead Free* Cast Copper Silicon Alloy
  • Disc Material: Viton®
  • Seat Material: Integral Lead Free* Cast Copper Silicon Alloy
  • Check Material: Lead Free* Copper Silicon Alloy
  • Adapter Material: Lead Free* Brass
  • Spring Guide Material: Stainless Steel
  • Spring Material: Stainless Steel
  • Maximum Working Pressure: 250 PSI (17.2 bar) WOG non-shock @ 100°F (38°C)
  • Minimum Operating Temperature: -20°F (-29°C)
  • Maximum Operating Temperature (with corresponding pressure reduction): 250°F (121°C) @ 160 PSI (11.0 bar)
  • Lead Content: Wetted surface contains less than 0.2% lead by weight
  • Installation Position: Horizontal or Vertical (with upward flow)
  • Testability: Non-testable

FAQs

What is the primary function of the 1/2" Watts LF601S Silent Check Valve?

Its primary function is to prevent water hammer in piping systems and ensure silent operation, efficiently acting like a swing or vertical lift check valve.

What type of connections does the LF601S model use?

The LF601S model features 1/2 inch solder (sweat) end connections, suitable for soft soldering into lines.

What materials are used in the construction of this check valve?

This valve is constructed with a Lead Free* cast copper silicon alloy body and seat, a Viton® disc, Lead Free* brass adapter, and stainless steel spring and spring guide.

Can this valve be installed in any position?

Yes, it can be installed in both horizontal and vertical positions, provided the flow through the valve is consistently upward.

What are the maximum pressure and temperature ratings for this valve?

The maximum working pressure is 250 PSI (17.2 bar) WOG non-shock at 100°F (38°C). The pressure rating decreases with higher temperatures, down to 160 PSI at 250°F.