Robar Service Repair Clamps

What Makes Robar Repair Clamps the Industry Standard

Robar Industries introduced the all-stainless-steel repair clamp to the waterworks market in 1965. More than five decades later, their 5600 Series remains the benchmark that municipal crews and utility contractors across North America trust for emergency and scheduled pipe repairs.

Here's why:

All-stainless construction — Shell, sidebar, and armor are T304 stainless steel, fully passivated to resist corrosion in buried and submerged applications
NBR rubber gaskets — Nitrile gaskets conform to irregular pipe surfaces and maintain seal integrity at working pressures up to 150 PSI
Anti-galling fasteners — 5/8″ NC T304 stainless steel bolts with coated nuts prevent seizing during torque application, a common field problem with lower-grade clamps
Made in Canada — Manufactured by Robar Industries in British Columbia, with full traceability and domestic support
Dual certification — Every repair clamp meets NSF/ANSI Standard 61 (safe for potable water contact) and AWWA C230 (dimensional and performance compliance)

These clamps are rated for working pressures up to 150 PSI on pipe sizes from 2″ to 12″, depending on the series. They're compatible with ductile iron, cast iron, steel, PVC, HDPE, and asbestos cement pipe.

Robar Repair Clamp Series — Quick Comparison

Series	Sections	Pipe Size Range	Tapped Outlet
Robar 5616 Repari Clamp	Single (1 bolt closure)	3″–12″	Optional (IP or CC)
Robar 5626 Repari Clamp	Double (2 bolt closures)	4″–12″	Optional (IP or CC)
Robar 5606 Repair Clamp	Single, full wrap	2″–6″	No
Robar 5696SC Repair Clamp	Snap clamp	Small pipes	No

How to Choose the Right Robar Repair Clamp

Selecting the correct Robar repair clamp depends on three factors: the type of damage, the pipe diameter, and whether you need a tapped outlet for a service connection.

By Damage Type:

Pinholes or small splits — The Robar 5696SC snap clamp is the fastest option. It doesn't require a full wrap, so installation takes minutes.
Longitudinal cracks or moderate holes — The Robar 5616 single-section clamp covers the damage with a single bolt closure. Available in 12″ or 16″ lengths, allowing a minimum of 4″ of clamp beyond each side of the repair area.
Large breaks or circumferential damage — The Robar 5626 double-section clamp uses two bolt closures for broader coverage and higher clamping force.
Full-wrap coverage on smaller mains — The Robar 5606 full wrap clamp wraps the entire pipe circumference, sealing holes or breaks on 2″ to 6″ mains.

Need a Tapped Outlet?

Both the 5616 and 5626 series are available with IP (Iron Pipe) or CC (Corporation Cock / AWWA) threaded taps in sizes 3/4″ to 2″. Tapped versions let you connect a new service line directly through the repair clamp, combining repair and service connection into one fitting.

Sizing & Installation Tips for Robar Repair Clamps

Sizing:

Measure the outside diameter (OD) of the pipe before ordering. Robar repair clamps are manufactured to IPS (Iron Pipe Size) standards. If you're repairing a crack, measure the length of the damage and select a clamp length that extends at least 4″ past each end.

Installation overview:

Clean the pipe surface around the repair area, remove dirt, scale, and loose material
Lubricate the clamp gasket with an NSF-certified pipe lubricant
Position the clamp so the gasket fully covers the damaged area
Hand-tighten bolts, then torque evenly using a ratcheting wrench or deep socket
Final torque to 80 ft. lbs. Using a torque wrench, work from the center outward, criss-crossing between bolt sections

Field tip: Robar repair clamps can be installed while the pipe is still in service (under pressure). This makes them an effective solution for emergency repairs, where shutting down the water supply isn't practical.

For a detailed look at Robar's full product line, including couplings, saddles, and pipe inserts, see our guide: Robar Coupling Solutions for Waterworks Infrastructure

Order Robar Repair Clamps Online from Cleanflow

Cleanflow is an authorized Canadian distributor of Robar Industries waterworks products. Shop Robar stainless steel repair clamps online with fast shipping across Canada and the USA. All clamps are in stock and ready to ship from our Winnipeg warehouse.

Frequently Asked Questions

What pipe materials are Robar repair clamps compatible with?

Robar stainless steel repair clamps fit ductile iron, cast iron, steel, PVC, HDPE, and asbestos cement pipe. Always match clamp size to the pipe's outside diameter for a proper seal.

Are Robar repair clamps rated for potable water systems?

Yes. Every Robar repair clamp carries NSF/ANSI Standard 61 certification, confirming it is safe for direct contact with drinking water in municipal distribution systems.

What is the maximum working pressure for Robar repair clamps?

All 5600 Series Robar clamps are rated for working pressures up to 150 PSI. Actual pressure performance depends on pipe condition, damage extent, and installation quality.

Can I install a Robar repair clamp without shutting off the water main?

Yes. Robar repair clamps are designed for live-line installation, making them suitable for emergency repairs on pressurized water mains where a full shutdown isn't feasible.

What is the difference between IP and CC tapped repair clamps?

IP (Iron Pipe) threads are standard tapered pipe threads. CC (Corporation Cock) threads follow the AWWA standard with a steeper taper and are compatible with all main stops using CC connections.

How do I choose between the 5616 and 5626 series?

The 5616 has one bolt closure and covers 3″–12″ pipe. The 5626 has two bolt closures for broader coverage on 4″–12″ pipe. Use the 5626 for larger breaks or when you need a tapped outlet on a bigger main.

What torque setting should I use when installing Robar repair clamps?

Tighten all fasteners to 80 ft. lbs. using a calibrated torque wrench. Start from the center bolts and work outward, alternating sides to apply pressure evenly across the gasket.