1" Watts LF601S Soft Seated Check - Sweat

Item Number: 0555183
1 1
$295.88
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 1 inch
  • Weight: 35.0 lb
  • Connection Type: Solder End Connections
  • Body Material: Lead Free Cast Copper Silicon Alloy
  • Disc Material: Viton®
  • Maximum Working Pressure: 250 PSI
  • Silent Operation
  • Low Pressure Drop
  • Installs Horizontally or Vertically

Description

The 1 inch Watts LF601S Lead Free Soft Seated Check Valve with solder end connections is engineered for industrial and plumbing applications to prevent water hammer. Its lead-free cast copper silicon alloy body and integral seat, combined with a Viton® disc, ensure durability and silent operation. This valve offers a low pressure drop and can be installed horizontally or vertically. It is rated for a maximum working pressure of 250 PSI at 100°F and is ideal for systems requiring quiet and efficient backflow prevention. Item number 0555183.

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Connections

  • The 1 inch Watts LF601S check valve features solder end connections, suitable for soft soldering into lines without disassembly.
  • For optimal performance and to prevent seat damage, use a low temperature solder (e.g., 420°F / 216°C) and direct heat away from the valve body during installation.
  • Note that the maximum operating pressure for 50-50 solder connections is 200 PSI (13.8 bar) at 100°F (38°C), which decreases with higher temperatures. Refer to ANSI B16.18 for detailed pressure ratings based on solder type and temperature.
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Additional Details

The 1 inch Watts LF601S Lead Free* Soft Seated Check Valve is designed for general industrial and plumbing applications to prevent water hammer effects in piping systems.

This silent check valve provides a low pressure drop and can be installed in either a horizontal or vertical position with upward flow. It is specifically designed to absorb fluctuating pressure.

Features

  • Lead Free* cast copper silicon alloy body for durability
  • Integral Lead Free* copper silicon alloy seat
  • Viton® disc for reliable sealing
  • Silent operation prevents water hammer
  • Allows for low pressure drop equivalent to a swing check
  • Installs in horizontal or vertical position with upward flow

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

Specifications

  • Size: 1 inch
  • Connection Type: Solder End Connections
  • Body Material: Lead Free* Cast Copper Silicon Alloy
  • Disc Material: Viton®
  • Seat Material: Integral Lead Free* Copper Silicon Alloy
  • Adapter Material: Lead Free* Brass
  • Check Material: Lead Free* Copper Silicon Alloy
  • Spring Material: Stainless Steel
  • Maximum Working Pressure: 250 PSI (17.24 bar) WOG non-shock @ 100°F (38°C)
  • Min. Working Temperature: -20°F (-29°C)
  • Max. Working Temperature: 250°F (121°C) at 160 PSI

FAQs

What is the primary purpose of the Watts LF601S check valve?

The Watts LF601S check valve is primarily used in general industrial and plumbing applications to prevent water hammer and ensure silent operation within piping systems. It is also designed to absorb fluctuating pressure.

What type of connections does the 1 inch LF601S valve use?

This valve features 1 inch solder end connections, designed for secure installation by soft soldering into plumbing lines. It is suitable for lines without disassembly.

What materials is the LF601S check valve constructed from?

The valve features a Lead Free* cast copper silicon alloy body, an integral Lead Free* copper silicon alloy seat, a Viton® disc, Lead Free* brass adapter, and Stainless Steel spring components, ensuring durability and compliance with lead-free requirements.

What is the maximum pressure rating for this valve?

The 1 inch LF601S check valve has a maximum working pressure rating of 250 PSI (17.24 bar) WOG non-shock at 100°F (38°C). The pressure rating may vary with higher temperatures or specific solder types.

Can the Watts LF601S valve be installed in any position?

Yes, this check valve can be installed in both horizontal and vertical orientations, provided the fluid flow direction is upward. It offers low pressure drop equivalent to a swing check.