Electric showers: A guide to pressure relief devices (PRDs). - YouTube
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Electric Showers: Replacing Pressure Relief Device (part no.82800450) on a Triton T80z - YouTube
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Aqualisa Long Outlet Pipe/PRD (Pressure Relief Device) : Amazon.co.uk: Home & Kitchen
How to replace a pressure relief device (PRD) on a Gainsborough SDL electric shower. - YouTube
Gainsborough Pressure Relief Device (reset) 95607238 - Gainsborough - Other Spares | Shower Doctor
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The Shower Doctor Surgery: How to replace a Triton electric shower PRD
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How to replace a pressure relief device (PRD) on a Gainsborough SDL electric shower. - YouTube
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