Description
Ball Valve Corp Stop for Water Main to Service Line Connections
Product Overview
A corporation stop valve is the first shutoff on a water service, installed right at the main. Its AWWA (CC) thread goes into the tapped main or a saddle, and the compression outlet takes copper or CTS poly service pipe. The Cambridge Brass 301NL is a no-lead brass ball valve rated for 300 PSI working pressure, in 1/2" to 2" sizes.
Key Features and Benefits
- The AWWA (CC) taper thread inlet fits a tapped main or a CC-tapped saddle, and Cambridge Brass states it works with all known tapping and drilling machines.
- A 360° operating head turns a no-lead brass ball on two PTFE seats for a bubble-tight shutoff at 300 PSI.
- The compression outlet grips copper type K or L, or CTS poly SDR-9, with an EPDM seal and stainless steel gripper ring, so no soldering is needed.
- A blowout-proof stainless steel stem carries two Buna-N O-rings that isolate it from line pressure.
- Every corporation stop valve is pressure tested before packaging and ships with a thread protector in place.
CTS Brass Compression Fittings Size Guide
Each 301NL has the same size inlet and outlet. Pick the size by the service pipe's outside diameter; copper type K or L and CTS poly SDR-9 share these diameters.
| Size | Fits Pipe OD | Length | Approx. Weight |
|---|---|---|---|
| 1/2" | 0.625" | Not listed | 1.1 lb |
| 3/4" | 0.875" | 4.05" | 1.6 lb |
| 1" | 1.125" | 4.59" | 2.4 lb |
| 1-1/4" | 1.375" | 6.37" | 8.2 lb |
| 1-1/2" | 1.625" | 6.49" | 7.5 lb |
| 2" | 2.125" | 6.78" | 10.0 lb |
Tip: CTS compression fittings are not interchangeable with IPS fittings or pipe. If you're using HDPE or CPVC pipe, verify that it follows CTS sizing and confirm the OD before purchasing.
For PVC or IPS poly pipe, choose the IPS compression corporation stop.
How to Install a Corporation Stop
- Into the main: Tap the main with a tapping machine or use a tapped service saddle. Protect the threads, seal the AWWA thread with a good quality sealant and do not overtighten.
- Tightening and angle: Turn the stop only on its wrench flats with a smooth-jawed adjustable wrench. Cambridge recommends a 45° angle with the operating head on the side.
- Service pipe: Put a CTS insert stiffener in the plastic pipe, push the pipe in, and tighten the nut until it bottoms against the body shoulder while a second wrench holds the stop. Loop the service pipe to ease strain.
- Finishing: Keep petroleum grease off the seals, pressure test, then backfill carefully.
Specifications
| Specification | Details |
|---|---|
| Brand | Cambridge Brass (Cambridge, Ontario) |
| Series | 301NL ball style corporation main stop |
| Sizes | 1/2", 3/4", 1", 1-1/4", 1-1/2", 2" |
| Connections | AWWA (CC) taper thread x CB compression (CTS), nut included |
| Working pressure | 300 PSI, bubble-tight |
| Operating head | 360° |
| Brass | Cast no-lead brass (C89833) on all parts that touch water; nut is cast brass (C83600) |
| Seats | Two PTFE |
| Stem | Stainless steel, blowout-proof, two Buna-N O-rings |
| Compression seal | EPDM, with stainless steel gripper ring and brass conductivity spring (electrical continuity on copper pipe) |
| Standards | AWWA C800, NSF/ANSI 61-8, NSF/ANSI 372 |
| Pipe | Copper type K or L (ASTM B88); CTS polyethylene SDR-9 (AWWA C901, ASTM D2737) |
| Service | Water only, cold water service lines |
| Insert stiffener | Required on plastic pipe |
Buy Corporation Stop Valves Online from Cleanflow
The Cambridge Brass 301NL corporation stop valve is available from Cleanflow Utility Supply Company, an authorized Cambridge Brass supplier. Shipping covers Canada and the USA, and free shipping applies to most orders over $199. Exchanges are accepted within 30 days of purchase under the Cleanflow refund policy. Questions about thread or pipe size? Email info@cleanflow.ca.
Frequently Asked Questions
What is a corporation stop in plumbing?
It is the valve that connects a water service line to the water main. It threads into the main or a saddle and lets crews shut the service off right at the main, separate from the curb stop closer to the building.
How does a corporation stop work?
The inlet threads into the main and the outlet grips the service pipe. Inside, a ball with a hole through it turns with the operating head: lined up with the pipe, water flows to the service; turned across, it stops.
How do you install a corporation stop?
Tap the main or fit a tapped saddle, seal the AWWA thread without overtightening, and turn the stop by its wrench flats. Set it at a 45° angle with the head on the side, loop the service pipe, pressure test, and backfill carefully.
What does CC thread mean?
CC is the common name for the AWWA taper thread used on corporation stop inlets. It started as Mueller's thread and was adopted into AWWA Standard C800. It tapers more steeply than a standard pipe thread, so the two are not interchangeable.
What is wet tapping a water main?
Wet tapping means drilling and threading a connection into a water main while it is still under pressure, so service is not shut off. Cambridge Brass states its corporation stops work with all known tapping and drilling machines that can go into a main under pressure.
Similar Products
Featured collection
