1/4
 1/4
 1/8
 1/4
 1/4
 1/8
 1/4
 1/4
 1/8
 1/4
 1/4
 1/4
 1/4

1.3
1.3
1.3
1.7
1.7
1.7
2.1
2.1
2.1
3.5
3.5
11.7
21.5

All Simmons ductile iron check valves are CERTIFIED LEAD FREE, featuring an ASTM A536 ductile iron body with non-toxic polyester powder coated finish. Each valve is furnished with Buna-N O-Ring, stainless steel spring, stainless steel washer, and stainless steel locknut. All valves ¾” through 1 ½” have a working pressure of 400 PSI, while valves 2” and larger have a working pressure of 600 PSI. Check valves rated for 190°F maximum temperature.