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The Primaflow 54mm Brass Stopcock is a heavy-duty isolation solution tailored for plumbing professionals and site engineers managing large-bore cold water systems. Its primary advantage is the robust, solid brass construction and crutch-head design, which allow for reliable control over high-volume flow in main risers and plant rooms; however, due to its significant weight of 3.67kg, it requires careful pipework support to prevent mechanical stress on connections.
| Model Part Number | SC54 |
|---|---|
| Brand | Primaflow |
No, this specific model is designed for cold water service only.
Yes, the unit includes all necessary compression olives for 54mm copper tube installation.
The valve weighs approximately 3.67kg.
The valve can be installed in either orientation, provided the pipework is adequately supported to take the weight of the valve.
It is designed for use with 54mm standard copper tubing.
Ensure the pipe is cut square and fully seated into the fitting. Tighten the compression nut further, ensuring the olive is properly compressed.
Check that the pipework is not exerting excessive force on the valve body. Apply a small amount of lubricant to the spindle.
The internal washer may be worn. Shut off the main supply upstream, disassemble the headwork, and inspect/replace the washer.
Installation should only be performed by a qualified plumber familiar with 54mm large-bore copper installations. Ensure that the pipe ends are cut square, deburred, and free of debris before inserting them into the compression ends. Tighten the compression nuts securely against the included olives to ensure a watertight seal, but avoid overtightening which could deform the fitting. For maintenance, periodically check the valve for any signs of weeping at the spindle. If the valve becomes stiff after long periods of inactivity, a light application of plumbing-grade silicone grease to the spindle can help maintain ease of movement. Always support the pipework on both sides of the valve to minimize mechanical strain.
