Watts LF601 3/8 Lead-Free Check Valve, Brass, FNPT

The Watts LF601 3/8 is a 3/8" lead-free silent spring check valve with FNPT connections. It permits flow in one direction and closes against reverse flow. It features a brass body and a fkm (viton) seat. Rated to 250 psi. This model is certified lead-free for potable-water installations.

This 3/8 inch lead free Maxi-Flo check valve is used in general industrial and plumbing applications to prevent the effects of water hammer in the piping system. It provides a silent operation with low pressure drop and can be installed horizontally or vertically. This valve consists of a lead free brass body, lead free brass check and adapter, Viton ® disc, and NPT female threaded end connections. The maximum pressure rating is 400 psi (27.6 bar), WOG non-shock at 100 degrees F (38 degrees C).

Features

• Lead free brass body
• Integral lead free brass seat
• Silent operation
• Viton ® disc

Common Questions

Can I install it vertically?

Yes. The LF601 3/8 is rated for horizontal or vertical lines because the spring, not gravity, closes the disc. In a vertical run the flow must be upward through the valve, following the body arrow.

Will it slam or cause water hammer?

No. The spring closes the disc before the flow actually reverses, so the valve seats silently instead of being slammed shut by the returning column of water. That is the point of a silent (non-slam) check.

Does it come with a strainer?

No. This is an inline check valve only. If the line carries debris, install a strainer upstream — grit on the seat is the usual cause of a check valve weeping by.

Is it potable rated?

Yes. The LF601 3/8 is certified lead-free for potable-water piping.

Specifications

• Type: Check
• Size: 3/8"
• Connection: FNPT
• Body Material: Brass
• Seat / Seal Material: FKM (Viton)
• Max Pressure (psi): 250
• Application: Domestic Water
• Pack Quantity: 40
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LF601 3/8
• Lead-Free: Yes
• Check Mechanism: Spring (Silent)
• Installation Orientation: Horizontal or Vertical
• Silent / Non-Slam: Yes
• Disc / Flapper Material: FKM (Viton)
• Integral Strainer Included: No