Description
John Guest 12mm Equal Straight Joiner – WaterMark Approved
Model: PEM0412W
The John Guest 12mm Equal Straight Joiner (PEM0412W) is a genuine John Guest® push-fit fitting designed to provide a secure inline connection for 12mm pipes. WaterMark certified and approved for hot water applications, this fitting delivers reliable, leak-free performance in caravan, RV, marine, and domestic plumbing systems.
Engineered with increased O-ring compression, the PEM0412W ensures a positive water seal under pressure, while push-fit technology allows for fast, tool-free installation. Approved for caravan manufacturing, this joiner is perfect for professional installers and DIY users who demand quality and compliance.
✅ Key Features & Benefits
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Genuine John Guest® 12mm push-fit fitting – trusted worldwide
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12mm × 12mm straight joiner – connects two pipes inline
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WaterMark certified – suitable for hot and cold potable water
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Increased O-ring compression – secure, leak-free seal
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Push-fit installation – fast, easy, and tool-free
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Approved for caravan manufacturing
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Durable, high-quality design – built to last
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Excellent value for professional or DIY use
⚙️ Specifications
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Brand: John Guest
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Model / Code: PEM0412W
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Connection Type: 12mm Push-fit × 12mm Push-fit
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Pipe Compatibility: 12mm John Guest pipe or similar tubing
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Application: Hot & cold water systems
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Design: Straight inline joiner
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Installation: Push-fit
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Certification: WaterMark Approved
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Colour: White
🧰 Applications
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Caravan and RV plumbing systems
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Motorhomes and camper trailers
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Marine and boat freshwater lines
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Domestic hot and cold water connections
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Repairs, replacements, or extensions for 12mm systems
📦 What’s Included
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1 × John Guest 12mm Equal Straight Joiner (PEM0412W, WaterMark Approved)
🌏 Why Choose John Guest & Plenty River?
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Global leader in push-fit plumbing technology
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WaterMark-approved for Australian compliance
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Trusted by caravan and RV manufacturers nationwide
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Fast, tool-free installation for professional and DIY use
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Long-lasting, durable, and reliable fittings