




Truma Push Fit Boiler Drain Valve 12mm
The Truma Push Fit Boiler Drain Valve 12mm (Part No. 70142-05) is an essential component for safely and efficiently draining water from Truma Ultrastore and Combi water heaters in caravans and motorhomes. This valve facilitates the removal of residual water, preventing potential damage from freezing temperatures and ensuring the longevity of your water heating system.
🔧 Key Features
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Compatibility: Designed for use with Truma Ultrastore and Combi water heaters, including models like 2E, 4E, and 6DE.
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Connection Type: Equipped with 12mm push-fit (John Guest) connectors, allowing for quick and secure installation with semi-rigid piping.
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Pressure Rating: Operates at a maximum pressure of 2.8 bar, suitable for standard caravan and motorhome water systems.
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Drainage Mechanism: Features a yellow on/off lever that, when opened, allows for the complete drainage of the water heater, reducing the risk of frost damage during colder months.
🛠️ Installation Overview
Installing the Truma Push Fit Boiler Drain Valve is straightforward:
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Preparation: Ensure the water heater is turned off and the system is depressurized.
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Disconnection: Remove the existing drain valve if present.
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Installation: Insert the 12mm push-fit connectors of the new valve into the corresponding semi-rigid pipes until they click into place.
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Testing: Open the yellow lever to verify that the valve drains water effectively.
For a visual guide on replacing the drain valve, you can refer to the following video:
✅ Final Thoughts
The Truma Push Fit Boiler Drain Valve 12mm is a reliable and easy-to-install solution for maintaining your water heating system. Its compatibility with Truma Ultrastore and Combi models, combined with the convenience of push-fit connectors, makes it a practical choice for caravan and motorhome owners. Regular use of this valve to drain your water heater can help prevent damage from freezing and ensure the efficient operation of your system.
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Pickup available at SouthWest Motorhomes - Sales, Hire & Service Ltd
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Free shipping on orders over £100 (exclusions apply)
All items come with full manufacturer guarantees for quality and performance
Shipping & Returns Policy
Shipping Policy
We aim to dispatch orders within 2 working days and are shipped via Royal Mail or FedEx with tracking and drop-off without signature.
Shipping is free on orders over £100 (exclusions apply)*
For orders under £100 there is a £5.99 shipping charge
For all next day orders there is a £9.99 shipping charge
*We offer FREE delivery on all orders over £100 (not including bespoke orders placed as part of our Part Finder service or products shipped directly from the supplier).
To see our full Shipping Policy click here
Returns Policy
If you're not completely satisfied with your order, you can return it to us within 14 days of receipt via Royal Mail. Though please note that we charge £3 for returns that are not faulty and the £3 will be deducted from your refund. Only damaged parts will have a full refund and return postage paid for.
To see our full Returns Policy click here

Truma Push Fit Boiler Drain Valve 12mm
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Fitting available at our NCC Approved Workshop
We supply genuine spare parts sourced directly from leading manufacturers, serving the caravan, motorhome, holiday park, leisure, and marine industries. Our close links with manufacturer technical teams give us access to hundreds of detailed diagrams, technical resources, and parts lists—ensuring you get the right component every time.
If your part requires professional fitting, our NCC Approved Workshop in Ilminster, Somerset is fully equipped to help. Simply get in touch to book an installation appointment, and our experienced technicians will ensure your parts are fitted safely, correctly, and in line with manufacturer specifications.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Free shipping
Free shipping on orders over £100. Dispatched within 2 days.
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