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The Primaflow 35mm DZR brass stopcock is an essential plumbing component designed for professional installers and homeowners working with 35mm copper tubing, particularly in environments prone to aggressive water chemistry. Its primary benefit is the Dezincification Resistant (DZR) construction, which prevents the structural weakening commonly found in standard brass fittings, though users should ensure they are comfortable working with larger 35mm copper pipe diameters before beginning installation.
| Model Part Number | 101647 |
|---|---|
| Brand | Primaflow |
DZR stands for Dezincification Resistant, which refers to an alloy specially formulated to resist the selective leaching of zinc, preventing internal structural weakness.
This stopcock is designed for 35mm copper tubing. Using it with plastic pipe is not recommended unless specific inserts and compatibility are confirmed.
Yes, its DZR construction makes it resistant to the types of corrosion commonly found in below-ground and buried environments.
Yes, the product includes the necessary olives for securing the connection to 35mm copper tubing.
While it can be installed horizontally or vertically, ensure the handle remains accessible for emergency shut-off.
Ensure the pipe ends are deburred and perfectly round. Tighten the nut by another quarter turn.
Check if mineral deposits have accumulated; applying a small amount of plumber's lubricant to the stem may help, or ensure the valve is not under excessive pipe tension.
The internal washer may be damaged or compressed; inspect the seat and replace the washer if necessary.
Installation requires standard pipe-fitting tools, including pipe cutters for the 35mm copper tubing and appropriately sized shifting spanners or wrenches for the compression nuts. Always ensure the pipe is fully inserted into the stopcock housing until it hits the internal shoulder. The provided olives must be placed on the pipe before tightening the nuts. For maintenance, periodically operate the handle to prevent scale buildup. If the valve is to be buried, ensure it is housed in a protective, accessible pit or box to facilitate future inspection or replacement. Do not overtighten the compression nuts, as this may deform the olive and cause leaks.
