WAFA water filling adapter for motorhomes and caravans

Click the hose on, fill the tank.

The WAFA is a water filler cap with a connector: it goes on the filler neck of your fresh water tank in place of your tank cap. The hose with a Gardena connector clicks on, and the water runs into the tank rather than past it. The end of the hose does not touch the tank opening.

Which WAFA fits? View in the shop

For bayonet and screw caps
For Gardena and compatible connectors
Hose does not touch the tank opening
WAFA+ stays on as the tank cap
Our own design, made in Germany

Developed by CamperStation

Filling up at the pitch

Who is actually holding the hose?

Filler necks sit low, at an angle or behind a narrow flap. The hose has to go in and stay there while the tank slowly fills.

It slips out

A loose hose in the filler neck tends to jump out when you turn the tap on. So you stand next to it and hold on until the tank is full.

It misses

Whatever splashes back or runs past the filler neck ends up on the side of the vehicle, in the storage compartment or on your shoes.

The end of the hose was on the ground a moment ago

When you roll out a hose, it lies on the ground. With the WAFA, it no longer goes into the tank opening but clicks on from the outside.

How it works

A cap with a connector

While you fill up, the WAFA replaces your tank cap. At the front is a connector for Gardena and compatible hose connectors, the kind you know from the garden.

Tap hose with a quick connector, as in the garden
Hose connector clicks onto the connector on the WAFA
WAFA sits on the filler neck in place of the tank cap
Tank the water runs in, the hose stays outside

Air has to get out

While water runs into the tank, air has to escape. With the WAFA, this happens through pressure-equalising openings in the adapter, so it is suitable for tanks with and without an overflow. The WAFA+ needs a working tank vent or an overflow on the tank.

The extra hose

A short hose comes with the WAFA. With short, horizontal filler necks and high pressure, the water can swirl and come out of the openings. In that case, fit the hose onto the outlet of the WAFA and push it into the filler neck.

It does not switch off

No WAFA can tell when the tank is full. When water comes out of the openings or the tank vent, turn the water off. So do not leave the tank filling unattended.

WAFA 3 with a yellow rim in the grey filler neck of a motorhome, with a hose and orange connector attached

Two designs

WAFA or WAFA+

The hose clicks onto both. The difference is what happens after filling up.

WAFA

For filling

WAFA 2, 3, 4, 5 and 8

You fit it in place of the tank cap while you fill up.
After filling up, you take it off, put the original cap back on and stow the WAFA. The service flap does not normally close with the WAFA fitted.
WAFA 2 to 5: pressure-equalising openings in the adapter, for tanks with and without an overflow. With a short extra hose.
WAFA 8: with a brass connector and a screw cap on a retaining strap.

WAFA+

Stays on as the tank cap

WAFA+ 6 and WAFA+ 7

It replaces your tank cap completely and stays on the filler neck, even while you drive.
A built-in valve opens for filling and closes afterwards, so no water runs back out of the tank.
A dust cap covers the connector when no hose is attached. The service flap still closes.
Brass connector. Only for tanks with a working tank vent or an overflow.

The quick way

Which WAFA fits?

A few questions about your vehicle and your tank cap. Whatever we know about the vehicle and manufacturer is already pre-selected. The surest check is your original cap: along with the result, we show you what it looks like, with a photo and dimensions.

The finder needs JavaScript. You can manage just as well without it: under Identify your cap you will find your tank cap and the matching WAFA.

What do you drive?

Not sure? Send a photo of your tank cap to info@camperstation.de – we will tell you which WAFA fits.

Identify your cap

Which tank cap do you have?

To find the matching WAFA reliably, compare your original cap with the photos and dimensions here. Take it off and look at two things: how it is fastened and how big it is.

Original tank cap with bayonet fitting seen from below: three pins on the rim circled in red — **Bayonet, 3 pins**Cap about 78 mm outside, opening about 63 mm insideFits: WAFA 3A

Original tank cap with bayonet fitting seen from below: two pins circled in red — **Bayonet, 2 pins**Cap about 39 mmFits: WAFA 4

Black original screw cap seen from the inside, with many shallow thread turns — **Screw cap, fine thread**Thread 60 mm, turns about 2.3 mm apartFits: WAFA 5F, WAFA+ 7F

Blue original screw cap seen from the inside, with few deep thread turns — **Screw cap, coarse thread**Thread 60 mm, turns about 6 mm apartFits: WAFA 5G, WAFA+ 7G

Blue original Giottiline tank cap with dimension lines for 60 and 45 mm, next to it the same cap from the side — **Screw cap, Giottiline/PLA**Cap 60 mm, thread 45 mmFits: WAFA 2

Blue original screw cap from a caravan seen from the inside, with a coarse thread — **Screw cap, caravan**Thread 50 mm, coarse threadFits: WAFA+ 6

Small tank filler neck with a blue WAFA 8 screwed on, below it the green original cap hanging on its strap — **Screw cap, small filler neck**Filler neck 40 mmFits: WAFA 8

How to measure

Bayonet or screw cap? A bayonet cap is secure after a short turn. A screw cap needs several turns.
Count the pins. On a bayonet cap there are small lugs on the inside that engage with the filler neck – two or three.
Measuring a bayonet cap: measure the cap on the outside, across the widest point.
Measuring a screw cap: measure the thread on the filler neck, across the outside of the turns. How close together the turns are tells you whether it is a fine or coarse thread.
No calliper to hand? Print out the measuring template and place the cap on the circles.

Measuring template (PDF, A4)

Print at actual size (100 %, not “fit to page”). Use a ruler to check the 50 mm line.

Measuring template (PDF, A4)

Not sure? Send us a photo of your tank cap, ideally from the inside and from the side. info@camperstation.de

Caps and WAFAs at a glance
Tank cap	Size	WAFA only for filling	WAFA+ stays on
Bayonet, 3 pins	Cap about 78 mm outside, opening about 63 mm inside	WAFA 3A	–
Bayonet, 3 pins	Cap about 68 mm outside, opening about 55 mm inside	WAFA 3B	–
Bayonet, 2 pins	Cap about 39 mm	WAFA 4	–
Screw cap, fine thread	Thread 60 mm, turns about 2.3 mm apart	WAFA 5F	WAFA+ 7F
Screw cap, coarse thread	Thread 60 mm, turns about 6 mm apart	WAFA 5G	WAFA+ 7G
Screw cap, Giottiline/PLA	Cap 60 mm, thread 45 mm	WAFA 2	–
Screw cap, caravan	Thread 50 mm, coarse thread	–	WAFA+ 6
Screw cap, small filler neck	Filler neck 40 mm	WAFA 8	–

The models

A WAFA for every cap

Each model fits one type of cap. The vehicles on the cards are the ones we know of – what matters is your cap.

WAFA

WAFA 3

For bayonet fittings with 3 pins, in two sizes. Most campervans from all manufacturers need the WAFA 3A, and so do most semi-integrated, integrated and over-cab motorhomes and caravans. Vehicles that need the WAFA 3B include newer Benimar Tessoro and older large liners from Niesmann + Bischoff.

WAFA 3A: cap 78 mm, opening 63 mm, with two spacer ring seals
WAFA 3B: cap 68 mm, opening 55 mm
For filling, for tanks with and without an overflow
With extra hose and Gardena O-ring

CS2310A · CS2311B

WAFA 3A · 78 mm – in the shop WAFA 3B · 68 mm – in the shop

WAFA

WAFA 4

For bayonet fittings with 2 pins and a cap of about 39 mm, as on most models from the Trigano group: Roller Team, Eura Mobil, Benimar (some need the WAFA 3B), Mobilvetta, Forster, Adria Mobil and Sun Living, McLouis, CI (Caravans International). Also the Hymer B-Class.

For filling, then the original cap goes back on
Pressure-equalising openings, for tanks with and without an overflow
With extra hose and Gardena O-ring

CS2305

WAFA 4 – in the shop

WAFA

WAFA 5

For 60 mm screw caps on motorhomes, for example from Knaus, Weinsberg and Bürstner. On Knaus and Weinsberg, from model year 2019/2020 with a coarse thread, before that with a fine thread.

WAFA 5F: fine thread
WAFA 5G: coarse thread
For filling, with overflow hose
Thread ring and connector turn independently

CS2307.1 · CS2306

WAFA 5F · fine – in the shop WAFA 5G · coarse – in the shop

WAFA+

WAFA+ 7

For 60 mm screw caps on motorhomes: Knaus and Weinsberg (from model year 2019/2020 coarse thread, before that fine thread), Bürstner, plus Chausson, Challenger and Ahorn Slim with a coarse thread.

WAFA+ 7F: fine thread
WAFA+ 7G: coarse thread
Stays on as the tank cap, the service flap still closes
Valve, dust cap, brass connector

CS2309 · CS2308.1 · CS2313

WAFA+ 7F · fine – in the shop WAFA+ 7G · coarse – in the shop WAFA+ 7G · Chausson, Challenger, Ahorn Slim – in the shop

WAFA+

WAFA+ 6

For Knaus and Weinsberg caravans with the water tank behind a service flap: filler neck 50 mm, coarse thread. For motorhomes with 60 mm there is the WAFA+ 7.

Stays on as the tank cap
Valve closes after filling
With dust cap and Gardena O-ring
Brass connector

CS2315

WAFA+ 6 – in the shop

WAFA

WAFA 2

For motorhomes from Giottiline and PLA with a short screw cap: cap 60 mm, thread 45 mm.

For filling, then the original cap goes back on
Pressure-equalising openings, for tanks with and without an overflow
With extra hose and Gardena O-ring
Plastic connector

CS2314

WAFA 2 – in the shop

WAFA

WAFA 8

For the small 40 mm filler neck, as on the Knaus Sun Traveler 504 from around 2001. We do not yet know of any other vehicle with this filler neck. (The shop page for this model is currently only in German.)

For filling
Brass connector
Screw cap with seal on a retaining strap

CS2316

WAFA 8 – in the shop

The hose connector is not included with any model. Gardena and compatible connectors for 1/2-inch hoses fit.

Compatibility list

Which manufacturer, which cap

What we know so far, by manufacturer. At the top is the most common case: most vehicles need the WAFA 3A. We are still collecting the details of model series and years; if in doubt, your cap decides.

Manufacturer	Vehicle	Tank cap	WAFA
Most manufacturers	Campervan	Bayonet, 3 pins · Cap about 78 mm outside, opening about 63 mm inside	WAFA 3A
Most manufacturers	Motorhome	Bayonet, 3 pins · Cap about 78 mm outside, opening about 63 mm inside	WAFA 3A
Most manufacturers	Caravan	Bayonet, 3 pins · Cap about 78 mm outside, opening about 63 mm inside	WAFA 3A
Adria Mobil	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Ahorn Slim	Motorhome	Screw cap, coarse thread · Thread 60 mm, turns about 6 mm apart	WAFA+ 7G
Benimar	Motorhome	Bayonet, 2 pins · Cap about 39 mm Bayonet, 3 pins · Cap about 68 mm outside, opening about 55 mm inside	WAFA 4, WAFA 3B
Bürstner	Motorhome	Screw cap, coarse thread · Thread 60 mm, turns about 6 mm apart	WAFA 5G, WAFA+ 7G
Challenger	Motorhome	Screw cap, coarse thread · Thread 60 mm, turns about 6 mm apart	WAFA+ 7G
Chausson	Motorhome	Screw cap, coarse thread · Thread 60 mm, turns about 6 mm apart	WAFA+ 7G
CI (Caravans International)	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Eura Mobil	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Forster	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Giottiline	Motorhome	Screw cap, Giottiline/PLA · Cap 60 mm, thread 45 mm	WAFA 2
Hymer B-Klasse	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Knaus	Motorhome	Screw cap, fine thread · Thread 60 mm, turns about 2.3 mm apart Screw cap, coarse thread · Thread 60 mm, turns about 6 mm apart Screw cap, small filler neck · Filler neck 40 mm	WAFA 5F, WAFA+ 7F, WAFA 5G, WAFA+ 7G, WAFA 8
Laika	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
McLouis	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Mobilvetta	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Niesmann + Bischoff	Motorhome	Bayonet, 3 pins · Cap about 68 mm outside, opening about 55 mm inside	WAFA 3B
PLA	Motorhome	Screw cap, Giottiline/PLA · Cap 60 mm, thread 45 mm	WAFA 2
Roller Team	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Sun Living	Motorhome	Bayonet, 2 pins · Cap about 39 mm	WAFA 4
Weinsberg	Motorhome	Screw cap, fine thread · Thread 60 mm, turns about 2.3 mm apart Screw cap, coarse thread · Thread 60 mm, turns about 6 mm apart	WAFA 5F, WAFA+ 7F, WAFA 5G, WAFA+ 7G
Knaus	Caravan	Screw cap, caravan · Thread 50 mm, coarse thread	WAFA+ 6
Weinsberg	Caravan	Screw cap, caravan · Thread 50 mm, coarse thread	WAFA+ 6

Is your vehicle missing, or does your WAFA fit a vehicle that is not listed here? Write to us with the manufacturer, model and year – it helps make the list more complete.

How to use it

In three steps

Shown with the WAFA+, which stays on as the tank cap.

WAFA+ on the fresh water tank in a storage compartment, with a hose and orange connector attached

Open storage compartment of a caravan, a hose leading to the WAFA on the fresh water tank

WAFA+ 6 on the tank in the storage compartment of a caravan, the yellow dust cap fitted in the connector

Cap off, WAFA on

Take off the original cap and fit the WAFA. With a screw cap, put it on straight and do not let it tilt, otherwise the thread on the tank can get damaged. With a bayonet fitting, tighten it with a short turn clockwise.

Fit it straight, do not tilt it

Click on the hose connector, fill up
Push the hose connector onto the connector of the WAFA until it clicks into place, then turn on the water. Stay with it: the WAFA does not switch off. When water comes out of the openings or the tank vent, the tank is full.

Disconnect and close
Pull off the hose connector. The WAFA+ stays on: fit the dust cap and close the service flap. The WAFA comes off: put the original cap back on and stow the adapter.

To be honest

What it can do – and what it can't

An adapter is a tool. So that you know where you stand:

What the WAFA can do

connect the hose firmly to the filler neck – you do not have to hold it
guide the water into the tank rather than past it
keep the end of the hose away from the tank opening
as the WAFA+, replace the tank cap and stay on

What it can't do

tell when the tank is full. It does not switch off, so do not leave the tank filling unattended.
make the water cleaner. That is what the CamperFilter is for.
work without a tank vent, in the case of the WAFA+. The tank needs a working tank vent or an overflow.
cope with heat. Above 60 °C, in the dishwasher or on a heating pipe, the plastic deforms.

Made by us

Material and manufacture

Our own design

CamperStation develops the WAFA itself and makes it in Germany. Questions are answered by the people who built it.

Made in-house

The adapter is made from plastic by additive manufacturing. Slight variations in colour and surface finish are possible.

Brass where it counts

WAFA+ 6, WAFA+ 7 and WAFA 8 have a brass connector. The WAFA+ also has a silicone seal, a brass pin and a stainless steel spring for the valve.

Care

Rinse with water, do not put it in the dishwasher and do not expose it to more than 60 °C. Do not leave it in hot places, such as next to the heating outlet.

Goes well with the WAFA

Three things from our own range

Everything to do with water in the vehicle, all developed by CamperStation.

HoseCap

The cap goes on the hose connector when you are done. That way the hose stays closed, and neither dirt nor insects get in. An eyelet keeps the cap on the hose so it does not get lost. Comes in a pack of three.

HoseCap in the shop

CamperFilter

The inline fill filter for the hose: stage 1 holds back sand, rust and dirt, stage 2 uses activated carbon to improve smell and taste. It goes between the tap and the WAFA while you fill up.

To camperfilter.de

WaterBob

When there is no tap within reach of your hose: the 25-litre tank on wheels with a built-in 12-volt pump. Fill it at the tap, roll it to the vehicle and pump the water into the tank through the hose.

To waterbob.de

What customers ask us

Questions

Which WAFA fits my vehicle?

That depends on your filler cap: whether it is fastened with a bayonet or a thread, and how big it is. Most campervans need the WAFA 3A, and so do most semi-integrated, integrated and over-cab motorhomes and caravans. The surest way is to compare your original cap with the photos and dimensions on this page; the finder at the top gets you there in a few clicks. If you are unsure, send a photo of your cap to info@camperstation.de.

Which WAFA fits a campervan?

Most campervans – whatever the manufacturer – have a bayonet fitting with 3 pins and a 78 mm cap. That is what the WAFA 3A is for. To be sure, compare your original cap with the photo under “Identify your cap”.

Which WAFA fits the Hymer B-Class, Roller Team, Eura Mobil, Adria and other Trigano models?

Most models from the Trigano group – Roller Team, Eura Mobil, Benimar, Mobilvetta, Forster, Adria Mobil, Sun Living, McLouis and CI – and the Hymer B-Class have a bayonet fitting with 2 pins and a cap of about 39 mm. That is what the WAFA 4 is for. Newer Benimar Tessoro models need the WAFA 3B.

Which water filler cap fits Knaus and Weinsberg?

Knaus and Weinsberg motorhomes have a 60 mm screw cap: from model year 2019/2020 with a coarse thread (WAFA 5G or WAFA+ 7G), before that with a fine thread (WAFA 5F or WAFA+ 7F). Their caravans with the water tank behind a service flap need the WAFA+ 6. Motorhomes from around 2001, such as the Knaus Sun Traveler 504, have a 40 mm filler neck: that is what the WAFA 8 is for.

Which WAFA fits Chausson, Challenger and Ahorn Slim?

The WAFA+ 7G, for 60 mm screw caps with a coarse thread. It replaces the tank cap and stays on. In the shop it has its own listing for these three manufacturers.

What is the difference between WAFA and WAFA+?

You only fit the WAFA for filling up; afterwards your original cap goes back on. The WAFA+ replaces the filler cap completely and stays on: a valve closes after filling, a dust cap covers the connector, and the service flap still closes.

Can the WAFA stay on while driving?

The WAFA+ can – that is what it is made for. You take the WAFA (2, 3, 4, 5 and 8) off after filling up and stow it away – with it fitted, the service flap does not normally close.

Which hose connector do I need?

A quick connector from Gardena or a compatible system for 1/2-inch hoses, like the ones you know from the garden. The hose connector is not included.

Does the WAFA switch off when the tank is full?

No. When water comes out of the openings of the WAFA or out of the tank vent, the tank is full and you turn the water off. So do not leave the tank filling unattended.

My tank has no overflow. Does it still work?

With the WAFA 2 to 5, yes: pressure-equalising openings in the adapter let the air out. The WAFA+ is only intended for tanks with a working tank vent or an overflow.

Water comes out of the openings while filling, even though the tank is not full.

This happens with short, horizontal filler necks and high water pressure: the water swirls. Fit the short hose supplied onto the outlet of the WAFA and push it into the filler neck. Turning the tap down a little also helps.

I don't know whether I have a fine or a coarse thread.

Look at the thread on the filler neck. A fine thread has many shallow turns close together, about 2.3 mm apart. A coarse thread has few deep turns, about 6 mm apart. On Knaus and Weinsberg, the thread changed around model year 2019/2020. If in doubt, send us a photo.

What is the WAFA made of?

PETG, made by additive manufacturing. WAFA+ 6, WAFA+ 7 and WAFA 8 have a brass connector; the WAFA+ also has a silicone seal, a brass pin and a stainless steel spring for the valve. Protect it from heat above 60 °C and do not put it in the dishwasher.

Where is the WAFA made?

CamperStation develops the WAFA itself and makes it in Germany.

What if my vehicle is not on the list?

Then your cap decides: with the “Identify your cap” section and the measuring template, you can find the type even without knowing the manufacturer. Or write to us with a photo of the cap. If your WAFA fits a vehicle that is not yet on the list, we would be glad to hear from you – it helps make the list more complete.

Where can I buy the WAFA?

In the CamperStation shop. You will find all models in the overview there: WAFA tank adapters in the shop.

Contact

Write to us

Not sure which WAFA fits? Is your vehicle missing from the list? Or do you want to tell us how your WAFA fits? Write to us – we reply personally.

Thank you, your message is on its way. We will get back to you by email.

That did not work. Please write to us directly at info@camperstation.de.

Or email us directly – you can include a photo of your tank cap:

info@camperstation.de