About Gradual On/Off Valves
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Plastic Threaded Gradual On/Off Valves for Drinking Water

- Valve Type: Gate
- For Use With: Drinking Water
- Seal Material: See table
- Specifications Met: NSF/ANSI 61
A lightweight alternative to metal valves, these plastic valves have NPT connections for use with threaded pipe. All meet NSF/ANSI 61 for use in drinking water systems. Also known as gate valves, they gradually open and close with multiple turns of the wheel handle to prevent system damage from suddenly starting and stopping flow. Since the handle sits on a nonrising stem, it stays at the same height whether these valves are open or closed. This helps them fit in underground lines and other low-clearance spots. When seals wear out, replace them using repair kits (sold separately).
PVC valves are made of the standard material used in most drinking water systems. CPVC valves resist heat up to 200° F, making them a better choice for hot water than PVC valves.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.
Valves | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
O'all | Repair Kits | ||||||||||||
Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | Seal Material | End-to-End Lg. | Ht. | Lg. | Stem Type | Color | Each | Each | ||
NPT Female | |||||||||||||
PVC Plastic Body and Polypropylene Plastic Gate | |||||||||||||
1/2 | 19 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 000000 |
3/4 | 37 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 0000000 | 00000 | 00000000 | 00000 |
1 | 44 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 1/4" | 5 7/8" | 3 1/4" | Nonrising | Dark Gray | 0000000 | 00000 | 00000000 | 00000 |
1 1/2 | 144 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 3/4" | 8 1/16" | 3 15/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 00000 |
2 | 333 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 15/16" | 8 9/16" | 4 7/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 00000 |
CPVC Plastic Body and Polypropylene Plastic Gate | |||||||||||||
1/2 | 19 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
3/4 | 37 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
1 | 44 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 1/4" | 5 7/8" | 3 1/4" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
1 1/2 | 144 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 3/4" | 8 1/16" | 3 15/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
2 | 333 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 15/16" | 8 9/16" | 4 7/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
Plastic Socket-Connect Gradual On/Off Valves for Drinking Water

- Valve Type: Gate
- For Use With: Drinking Water
- Seal Material: See table
- Specifications Met: NSF/ANSI 61
Bond these valves to plastic pipe with PVC primer and cement (not included) to create a permanent, leak-tight connection in drinking water lines. Also known as gate valves, they open and close gradually to prevent damage to your system from sudden changes in flow. Turn the handle multiple times to start or stop flow. Safe for use in drinking water systems, these valves meet NSF/ANSI 61. They’re plastic, so they’re lighter in weight than metal valves.
All have a nonrising stem, which means that the handle won’t move up as the valve opens. This makes them good for underground and other low-clearance applications.
CPVC valves handle temperatures up to 200° F, so you can use them in hot drinking water applications.
Use repair kits to replace worn seals.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
Valves | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
O'all | Repair Kits | ||||||||||||
Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | Seal Material | End-to-End Lg. | Ht. | Lg. | Stem Type | Color | Each | Each | ||
Socket Connect Female | |||||||||||||
PVC Plastic Body—Polypropylene Plastic Gate | |||||||||||||
1/2 | 19 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 000000 |
3/4 | 37 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 0000000 | 00000 | 00000000 | 00000 |
1 | 44 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 5/16" | 5 7/16" | 3 5/16" | Nonrising | Dark Gray | 0000000 | 00000 | 00000000 | 00000 |
1 1/2 | 144 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 3/4" | 8 1/16" | 3 3/4" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 00000 |
2 | 333 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 15/16" | 8 9/16" | 3 15/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 00000 |
CPVC Plastic Body—Polypropylene Plastic Gate | |||||||||||||
1 | 44 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 1/4" | 5 13/32" | 3 1/4" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
2 | 333 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 15/16" | 8 9/16" | 4 7/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
Plastic Flanged Gradual On/Off Valves for Drinking Water

- Valve Type: Gate
- For Use With: Drinking Water
- Seal Material: Buna-N Rubber
- Specifications Met: NSF/ANSI 61
Easier to install and remove for maintenance than threaded and weld-on valves, these valves bolt and unbolt to flanges. They meet NSF/ANSI 61 for safe use in drinking water systems. Also known as gate valves, they open and close gradually with multiple turns of the wheel handle to prevent damage from sudden starts and stops in flow. Whether these valves are open or closed, the handle stays at the same height because of the nonrising stem. This helps them fit in low-clearance areas, such as underground lines. All are plastic, making them a lightweight alternative to metal valves. When the seals wear out, replace them using repair kits (sold separately).
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.
Valves | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
O'all | Repair Kits | |||||||||||||||||
Pipe Size | Pressure Class | Flange OD | Bolt Circle Dia. | No. of Bolt Holes | Bolt Hole Dia. | Bolts Included | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Stem Type | Color | Each | Each | ||
PVC Plastic Body with Polypropylene Plastic Gate | ||||||||||||||||||
1/2 | 150 | 3 1/2" | 2 3/8" | 4 | 1/2" | No | 15 | 150 psi @ 70° F | 32° to 140° | 4 3/4" | 5 7/8" | 4 3/4" | Nonrising | Dark Gray | 00000000 | 0000000 | 00000000 | 000000 |
3/4 | 150 | 3 7/8" | 2 3/4" | 4 | 1/2" | No | 29 | 150 psi @ 70° F | 32° to 140° | 5" | 6 1/16" | 5" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
1 | 150 | 4 1/4" | 3 1/8" | 4 | 1/2" | No | 39 | 150 psi @ 70° F | 32° to 140° | 5 3/8" | 6 7/16" | 5 3/8" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
1 1/2 | 150 | 5" | 3 7/8" | 4 | 1/2" | No | 127 | 150 psi @ 70° F | 32° to 140° | 6 3/4" | 9 1/16" | 6 3/4" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
2 | 150 | 6" | 4 3/4" | 4 | 5/8" | No | 279 | 150 psi @ 70° F | 32° to 140° | 7 1/4" | 9 7/8" | 7 1/4" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
Gradual On/Off Valves with Press-Connect Fittings for Drinking Water


- Valve Type: Gate
- For Use With: Drinking Water
- Specifications Met: NSF/ANSI 61
For a leak-tight connection in drinking water lines without heat or soldering, crimp the fittings on these valves to metal tubing with a press-connect crimping tool (sold separately). The fittings are comparable to Viega fittings. Also known as gate valves, they open and close gradually to prevent damage to your system from sudden changes in flow. Safe for use in drinking water systems, these valves meet NSF/ANSI 61. They have good corrosion resistance since they’re made of bronze.
Valves with nonrising stems fit well underground and in other low-clearance places since the handle doesn’t move up when the valve opens.
Valves with rising stems let you see at a glance whether flow is on or off. The handle rises as the valve opens and lowers as it closes. The stem stays separate from the material flowing through your line, reducing corrosion so they last longer than valves with nonrising stems. With a long lifespan, you can use them for critical lines and lines that need to be opened and closed frequently.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.
Copper Tube Size | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | End-to-End Lg. | For Tube OD | Each | |
Nonrising Stem | |||||||
---|---|---|---|---|---|---|---|
Press Connect Female | |||||||
Bronze Body and Gate | |||||||
1/2 | 17.6 | 200 psi @ 250° F | 0° to 250° | 5" | 5/8" | 0000000 | 0000000 |
3/4 | 32 | 200 psi @ 250° F | 0° to 250° | 5 3/4" | 7/8" | 0000000 | 000000 |
1 | 54 | 200 psi @ 250° F | 0° to 250° | 6 9/16" | 1 1/8" | 0000000 | 000000 |
1 1/4 | 97 | 200 psi @ 250° F | 0° to 250° | 6 7/8" | 1 3/8" | 0000000 | 000000 |
1 1/2 | 135 | 200 psi @ 250° F | 0° to 250° | 7 5/16" | 1 5/8" | 0000000 | 000000 |
2 | 230 | 200 psi @ 250° F | 0° to 250° | 9 5/16" | 2 1/8" | 0000000 | 000000 |
Rising Stem | |||||||
Press Connect Female | |||||||
Bronze Body and Gate | |||||||
1/2 | 17.6 | 200 psi @ 250° F | 0° to 250° | 5" | 5/8" | 0000000 | 000000 |
3/4 | 32 | 200 psi @ 250° F | 0° to 250° | 5 3/4" | 7/8" | 0000000 | 000000 |
1 | 54 | 200 psi @ 250° F | 0° to 250° | 6 9/16" | 1 1/8" | 0000000 | 000000 |
1 1/4 | 97 | 200 psi @ 250° F | 0° to 250° | 6 7/8" | 1 3/8" | 0000000 | 000000 |
1 1/2 | 135 | 200 psi @ 250° F | 0° to 250° | 7 5/16" | 1 5/8" | 0000000 | 000000 |
2 | 230 | 200 psi @ 250° F | 0° to 250° | 9 5/16" | 2 1/8" | 0000000 | 000000 |