If you’re installing or upgrading a domestic or commercial plumbing system, one thing is non-negotiable: pressure control. Excessive pressure doesn’t just risk compliance issues — it can wreck pipework, void warranties, and damage tapware, water heaters, and appliances.
The solution? The PRVB20-BV20 Combination Pressure Reduction and Isolation Valve — a two-in-one fitting that gives you precise pressure control and instant shutoff in a single, compact unit.
🔧 What Is the PRVB20-BV20?
This smart combination valve includes a factory-set pressure-reducing valve (PRV) and a full-bore ball isolation valve, all in one compact body. That means fewer fittings, faster installs, and less potential for leaks.
Ideal for mains water supply lines, it’s commonly used upstream of:
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Hot water systems
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Fixtures prone to water hammer
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Appliances like dishwashers and washing machines
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Irrigation systems
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Any setup that needs reliable, regulated pressure
🛠️ Key Benefits at a Glance:
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✅ Factory set to 500kPa – complies with AS/NZS 3500
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✅ Integrated isolation valve – no extra fittings needed
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✅ 20mm compression connections – suits standard copper installs
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✅ Durable brass body – built for Aussie conditions
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✅ Compact footprint – ideal for tight installations
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✅ Watts quality – trusted globally for valve technology
👉 Order the 20mm PRVB Combo Valve here
💡 Why It’s a Must-Have on Site
Without a pressure-reducing valve, water pressure spikes from the street mains can slowly destroy your system — even if everything looks fine at first. You’ll see symptoms like:
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Leaking tapware
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Failing dishwasher seals
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Constant HWS valve discharge
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Water hammer or noisy pipework
This compact PRVB valve solves that upfront and gives you a quick shutoff for maintenance or emergency work. It's also a huge time saver for plumbers, combining two installs into one and reducing the need for additional joints or fittings.
🧰 Who’s It For?
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Plumbers upgrading or replacing hot water units
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Builders seeking to standardise plumbing protection
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Maintenance crews looking for a plug-and-play solution
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Anyone needing to meet 500kPa compliance under AS/NZS 3500
🚿 Real-World Ready
Whether you’re roughing in a new build or upgrading a system that’s seen one too many pressure surges, this Watts PRVB20-BV20 combo valve delivers performance, protection, and peace of mind.
Built for longevity, backed by global trust, and available now through Australia’s most trade-focused plumbing store.
👉 Shop the 20mm Pressure Reduction + Isolation Ball Valve Now