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The Primaflow Gate Valve (102249) is an essential component for professional plumbers and serious DIYers looking for a reliable, high-flow isolating solution for 42mm pipework. Its primary benefit is the full-bore design, which ensures minimal pressure drop, while the DZR brass construction provides exceptional resistance against corrosion in aggressive water environments; however, users should note this valve is designed strictly for binary fully-open or fully-closed operation and should not be used to throttle or regulate flow.
| Model Part Number | 102249 |
|---|---|
| Brand | Primaflow |
No. This valve is designed only for fully open or fully closed positions. Throttling can cause severe wear on the gate.
DZR stands for Dezincification Resistant. It is a specialized alloy designed to prevent the zinc from leaching out of the brass, which prevents the valve from becoming brittle in aggressive water.
Yes, its durable construction makes it well-suited for hot water and central heating circuits.
While gate valves are generally bi-directional, it is best practice to install them so the flow does not impede the closing mechanism.
Only if you use the appropriate pipe inserts meant for the specific brand of plastic pipe you are using to ensure the compression seal is maintained.
Gently tighten the gland nut located under the handle to compress the packing seal.
Check for mineral deposits or debris trapped in the gate track. If stubborn, ensure the system is isolated, then remove the bonnet to clean.
Ensure the pipe is cut squarely and the olive is seated correctly. Retighten the nut slightly; if the leak persists, the olive may need replacement.
To install, ensure the 42mm pipe ends are cut square and deburred to prevent damage to the internal compression olives. Insert the pipe fully into the valve body and tighten the compression nuts manually until snug, then use a suitable wrench to tighten approximately one half-turn further. Do not overtighten, as this can deform the olive. For maintenance, check the valve periodically for any signs of weeping at the gland nut. If a leak occurs at the stem, tightening the gland nut slightly is usually sufficient. Avoid using chemical cleaners that are not compatible with brass, and ensure the system is flushed before final tightening to clear any debris that might damage the internal seat.
