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The Oracstar Straight Compression Service Valve (15mm x 1/2 inch) is an essential component for homeowners and professional plumbers looking to isolate sections of their water supply. Designed for ease of use in both hot and cold water systems, it simplifies routine maintenance by allowing you to shut off water flow to specific fixtures without affecting the rest of the house; however, users should ensure they have the proper compression wrenches and pipe cutters before beginning installation to avoid damaging the copper tubing.
| Model Part Number | PF29 |
|---|---|
| Brand | Oracstar |
Generally, compression fittings seal using the olive and do not require PTFE tape on the threads.
This valve is designed for 15mm copper pipe; if using plastic piping, you must use a dedicated pipe insert to prevent the pipe from collapsing.
Yes, it is designed for both hot and cold water systems, making it suitable for standard residential heating loops.
You will need a pipe cutter, two adjustable wrenches (one to hold the valve, one to tighten the nut), and a screwdriver to operate the valve.
The slot on the head of the valve indicates the flow direction; when the slot is perpendicular to the pipe, the water is shut off.
Tighten the nut by another quarter-turn; if the leak persists, check if the olive is seated correctly or if the pipe has scratches.
Limescale may have formed; apply a small amount of plumber's lubricant or gently work the valve back and forth to loosen it.
The olive is likely not compressed enough or missing; ensure the nut and olive are properly installed and tightened.
To install, first ensure the water supply is turned off at the mains. Cut the 15mm copper pipe cleanly, ensuring it is free of sharp edges. Slide the compression nut and the olive onto the pipe, insert the pipe into the valve body, and tighten the nut by hand. Follow up with a wrench to tighten an additional half-to-three-quarters of a turn. Avoid over-tightening, as this can crush the olive. For care, periodically test the valve by turning it a quarter-turn every six months to prevent the internal components from seizing due to limescale buildup.
