Figure X431
BRASS BODY CHECK VALVES
LOW LEAD COMPLIANT WATER SERVICE
IN-LINE CHECK VALVE w/PRESS ENDS
The FNW gure X431 press check valve
for water service is suggested for all
applications where labor and time savings
is a must. The gure X431 allows quick
installation on copper pipelines meeting
ASTM B88 standards. The structure of
the valve, made in dezincication resistant
brass, guarantees excellent corrosion
resistance particularly in the connection
areas of the pipeline.
Features:
• 200 PSI Max. Working Pressure
• Temperature Range from 10°F to 250°F
• Press Ends
• High Capacity
• NSF 61 Annex G Certied (UL)
(Annex G references NSF 372)
• True 2-Piece Design
• Drip Fit O-rings
• No Soldered-In End Pieces
• Low 1/2 PSI Cracking Pressure
• Patented Obstructor Guide Prevents Side
Loading
• Flow Prole Designed to Minimize Head
Loss
• Spring Loaded Soft Seat for Bubble Tight
Shutoff
• Forged Brass Body
• Sizes 1/2” to 2”
• 100% DZR Brass offering greater
protection from corrosion and cracking
Low Lead Compliant: Referring to laws dening “Lead
Free” as wetted surface of pipe, ttings and xtures in
potable water systems that have a weighted average
lead content ≤ 0.25% per the Safe Drinking Water Act
(Sec. 1417) amended 1-4-2011 as well as other state
regulations.
LOW
LEAD
COMPLIANT
* NOT RECOMMENDED FOR BURIED SERVICE
Drip Fit O-rings
Dimpled O-ring
The Drip Fit o-rings ensure that an unpressed
end will drip. This is an added safety feature
to ensure unpressed ends are discovered
and corrected.
Figure Number Matrix
FNW X431 Size
SIZE CODE
1/2 = D
3/4 = F
1 = G
1-1/4 = H
1-1/2 = J
2 = K
www.fnw.com
Cv & Weights
Size Cv Wt. (Lbs)
1/2 5.2 0.34
3/4 9.4 0.56
1 14.5 0.85
1-1/4 23.5 1.19
1-1/2 33.5 1.92
2 52 2.86
Figure X431
BRASS BODY CHECK VALVES
LOW LEAD COMPLIANT WATER SERVICE
IN-LINE CHECK VALVE w/PRESS ENDS
Dimensions (Inches)
Size ØP ØP1 S K N ØH L
1/2 0.59 0.59 0.71 0.67 0.31 1.36 2.99
3/4 0.79 0.83 0.91 0.83 0.39 1.65 3.56
1 0.98 1.07 0.94 0.83 0.39 1.93 3.94
1-1/4 1.26 1.34 1.02 0.83 0.39 2.40 4.09
1-1/2 1.57 1.57 1.42 1.02 0.49 2.87 4.98
2 1.97 1.97 1.57 1.20 0.59 3.46 5.61
DOC: FNWX431V13 Ver. rev-06/2016
© 2016 - FNW. All rights reserved.
The FNW logo is a registered trademark of Ferguson Enterprises, Inc., PL Sourcing, PO Box 2778, Newport News, VA 23609
The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not to be construed as
warranties or guarantees, expressed or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and
conditions, which are available on request. We reserve the right to modify or improve the designs or specications of our products at any time without notice. Always
verify that you have the most recent product specications or other documentation prior to the installation of these products.
Ref. No. Description Material Qty
1 Body Brass CW 511L 1
2 End Connection Brass CW 511L 1
3 Spring Stainless Steel AISI 302 1
4 Gasket Ring NBR 2
5 O-Ring EPDM 2
6 Obstructor Polyetherimide 1
Standard Materials
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