



Dethleffs Water Inlet Replacement Cover
🔧 What It Is & Why You Need It
This replacement cover restores the protective cap on your fresh-water inlet, safeguarding it from water, dirt, and debris. If your original cracked or went missing, an OEM cover prevents contamination and restores the inlet’s integrity at minimal cost.
📏 OEM vs. Universal Options
Dethleffs Water Inlet Replacement Cover (OEM)
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Pros: Specifically designed for Dethleffs inlets—exact fit, color match (white), and the same hinged mechanism.
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Best For: Owners wanting a seamless, original look and straightforward replacement.
SecureFix Direct Water Inlet Filler Cap (Universal)
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Pros: Lockable lid with two keys, protecting against tampering.
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Cons: Slight risk of fit mismatch—measure your inlet diameter first.
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Best For: Those prioritizing security and convenience.
Seaflo RV Fresh Water Inlet Cap
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Pros: Budget-friendly, screw-on design, widely compatible with RV inlets.
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Cons: May not have the exact shape or hinged mechanism of OEM; tipping mechanism replaces hinge.
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Best For: Quick, cost-effective temporary solution.
✅ Which One Should You Choose?
| Option | Insight |
|---|---|
| OEM Cover | ✅ Seamless match, hassle-free install, OEM quality |
| SecureFix Universal Cap | 🛡️ Lockable and secure, but verify dimensions |
| Seaflo Cap | 💷 Budget-friendly and practical, check compatibility |
🛠️ Installation Tips
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Simply press-fit or screw the new cover into place—no tools needed.
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After installation, open and close it a few times to ensure smooth movement and a proper water seal.
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For lockable models, keep your keys handy and consider labeling them.
🧼 Maintenance
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Clean the cap and inlet regularly to prevent grime buildup that could hamper the seal.
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If the hinge feels stiff, apply a drop of food-safe silicone spray (for freshwater compatibility).
🎯 Final Verdict
For a perfect fit and finish, the Dethleffs OEM cover is your best bet. If you're after a secure, lockable option or a cheap replacement, SecureFix or Seaflo caps work well—just double-check compatibility with your inlet.
Couldn't load pickup availability
Pickup available at SouthWest Motorhomes - Sales, Hire & Service Ltd
Usually ready in 4 hoursPairs well with
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

Dethleffs Water Inlet Replacement Cover
Can't find what part you need?
It can be daunting and frustrating when you can't find the part you need. Use our Part Finder service and let us do the work for you.

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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Help is on hand
We are here to assist you with any queries you may have about any product.
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Drop us a message if you need further assisatance

