Cyl. Camper LPG Vapor Tank 20L (Ø200x720) GZWM 4 Hole 67R - Incl. Valves - Camper Cooking

1. Manual Tank Valve Shell

Standard version with a SHELL Male (G.2/G.4/G.5/G.8) connection and W21.8x1/14 Left-hand thread (completely made of brass without rubber). Ideal for connecting a pressure regulator directly to the vapor tank. (To connect a G.12 coupling, an adapter from G.5 to G.12 is required for a gastight seal.)

2. Manual Tank Valve 8mm

This variant is equipped with an 8mm compression fitting. This allows you to connect an 8mm LPG line (copper or plastic) directly towards the pressure regulator. Ideal for installations where the pressure regulator is mounted at a distance.

3. Electric Tank Valve (12V)

Enables opening and closing the tank from inside the vehicle via a switch (12V / 11W) (Normally Closed). Ideal when the tank is placed far under the vehicle and is difficult to reach. Features a 5/16" UNF Flare connection for 8mm pipes. Please note that staying stationary for long periods with the valve energized (Open) may drain the battery. Always use a fuse and relay.

The 4 Accessories on the tank

Our 4-hole LPG vapor gas tanks are equipped with 4 accessories (tank valves), namely:

• 80% Fill Valve: With non-return valve and elbow featuring a 1/2" UNF conical flare connection for the filling hose.
• Pressure Relief Valve: Ensures that the pressure in the tank never exceeds 27 bar.
• Extraction Valve: (Manual or electric) equipped with an integrated excess flow valve, available with various connections (5/16" UNF, 8mm compression, or Shell G.2/G.4/G.8).
• Level Gauge: With a float and dial (standard without wiring). An optional LED indicator with tank sensor is available for remote reading on the dashboard.

All tank accessories are professionally assembled and tested by us before the tank is shipped. An optional valve box can be ordered for extra protection and controlled discharge of any blow-off gases.

1. Aluminum Valve Box (Gastight)

This classic aluminum box is intended for a fully gastight seal. Using the included rubbers and a vent hose with floor penetration (not included), you can safely place the tank in an interior space. The box captures any gases from the pressure relief valve and discharges them directly outside the vehicle.

2. Extended Valve Box (Protective Cover)

This robust steel cover is not gastight but offers optimal protection against dirt, splashing water, and stone chips. Thanks to the extended design, this box protects not only the accessories but also the pressure regulator if it is mounted directly on the tank. Ideal for under-vehicle installations.

When is a valve box gastight?

The ability to seal the installation gastight (for internal mounting) depends heavily on the chosen tank valve:

• Manual 8mm Valve (facing outwards): Cannot be made gastight due to lack of space for the sealing sleeve.
• Manual 8mm Valve (facing inwards): Can be connected gastight by placing the gas line in a loop inside the box.
• Electric Tank Valve: Can be connected fully gastight in combination with the aluminum valve box.

If the LPG tank is placed in an external area (under-vehicle) or an already ventilated gas locker, a gastight finish is not required, but protection against weather influences remains necessary.

What is an LPG Vapor Tank?

This component stores liquid LPG and ensures its evaporation so that the gas leaves the tank in gaseous form. Most vapor tanks are recognizable by their red color and/or the "VAPOUR USE" marking and feature four accessories (filling, extraction, level gauge, and pressure relief). These tanks comply with the strict UNECE 67R automotive standards.

How does the evaporation process work?

LPG is stored as a liquid, but a small portion evaporates at the top of the tank. As soon as you draw gas, the pressure drops and more liquid evaporates. This process extracts heat from the environment:

• The tank cools down during use.
• Propane evaporates better at low temperatures than butane.
• During very high consumption and in cold conditions, the pressure can drop because the tank cools down too much.

Do you have a very high gas demand (e.g., for a large food truck)? Consider coupling multiple cylinders or tanks for increased evaporation capacity.

The following tutorials relate to this article:

1. LPG Vapor Tanks for Motorhomes, Caravans, and Food Trucks
   General information about applications and advantages.
2. LPG installation in a recreational vehicle
   Comprehensive guide on building your gas system.
3. Mounting instructions for LPG cylindrical tanks
   Crucial instructions for a safe and solid fixation.
4. How does a tank gauge work on an LPG tank?
   Explanation of floats, dials, and LED indicators.
5. Pressure Regulators for Gas Cylinders and Vapor Tanks
   Information on crash sensors and safe gas extraction.

Do you have any questions after reading these tutorials? Please contact our customer service for technical advice.

Positioning & Alignment Mark

Pay close attention to the alignment mark (located to the left above the valves). This indicates the horizontal center plane and the top of the tank. After installation, the valves should point slightly downwards. If the tank is not correctly positioned, the 80% fill valve and the level gauge will not function properly, leading to issues during filling or emptying the tank.

Available Mounting Methods

1. Mounting brackets with base

These brackets clamp around the tank and feature a base that can be attached directly to the chassis or the floor of the vehicle. They are very robust and suitable for both under-vehicle and internal mounting. Available in various sizes for almost every tank diameter.

2. Mounting Rings

Ideal for creating a custom construction in combination with steel angle profiles. The rings clamp around the tank and can be welded or bolted to a frame. This method is suitable for under-vehicle and internal mounting.

3. Tank frame with straps

This system consists of a rack on which the tank is secured with steel straps. Note: Only suitable for internal mounting and for tanks with a diameter of 27 cm up to 40 cm (max. 140L). For tanks larger than 85L, always use 4 straps.

Basic Installation Regulations:

• The tank must not have metallic contact with the mounting brackets (use the provided insulation material).
• Maintain a minimum ground clearance of 20 cm for under-vehicle mounting.
• Maintain a minimum distance of 10 cm from heat sources (such as the exhaust).
• Pipes and lines must never be the lowest point of the vehicle.
• Installation should preferably be performed by a certified LPG specialist.
• Have the complete installation inspected by a competent authority.

For more detailed instructions, please refer to our tutorial: Mounting instructions for LPG cylindrical tanks.

Typical layout of a complete vapor tank installation

The foundation of a safe installation is a secure attachment. You can use individual mounting brackets or a vapor tank mounting set (rear set). These sets include certified brackets and a refuelling system of your choice. See the "Mounting & Installation" block for more details.

For maximum refuelling convenience, we recommend a complete external filling set. These all-in-one packages include an external filling point (flat or surface mount), a custom-length filling hose, pipe clips, and a set of European filling adapters. This allows you to refuel throughout Europe without having to open the gas locker.

The use of a pressure regulator is essential to reduce the high tank pressure to the safe operating pressure (30 mbar) for your appliances. According to the European regulation EN 1949, the pressure regulator must be mounted directly onto the tank valve, without the intervention of hoses or pipes. Most pressure regulators for recreational vehicles are already equipped with the required overpressure safety valve (S2SR).

Downstream of the pressure regulator, the low-pressure section (30 mbar) begins. This part of the installation transports the gas to the appliances (heater, hob, refrigerator). Key components include:

• Fixed gas piping: Preferably use 8mm or 10mm steel or copper pipes for the main structure.
• Flexible gas hoses: Only permitted for the final connection to appliances or for moving parts.
• Manifold valves: To allow each gas-consuming appliance to be shut off individually via a central block.
• Fittings: Use only approved compression fittings or quick-couplings for a gastight connection.

Don't want to bend down to check the gas level on the tank itself? There are several ways to read the tank contents comfortably from a distance:

• Mopeka Bluetooth sensors: These allow you to read the level accurately on your smartphone. Specifically for cylindrical tanks, concave (hollow) self-adhesive holders are available for different tank diameters (Ø200-270mm and Ø300-370mm) to ensure optimal signal transmission.
• Wired LED indicator: A proven solution where the mechanical gauge on the tank is replaced by an electronic tank sensor, connected via cable to an indicator on your dashboard. Available with or without an integrated switch (e.g., to operate an electric tank valve via a fuse and relay).

Type Approval Document

In addition to the unique certificate, there is also a general type approval document. This document pertains to the specific tank model (for example, all tanks with a certain diameter from a specific manufacturer).

• Indicates which European directives the type of tank complies with.
• Contains the classification and the official approval number.
• Mentions which laboratory provided the type approval.

Want to know more about how to read the markings on the tank itself? Check out our tutorials on LPG regulations.

Transport & Costs

Shipping costs depend on the destination and the total weight of your order. You can easily view the shipping costs by placing the product(s) in your shopping cart and specifying the destination.

• Parcel Service: For orders up to 30kg.
• Pallet Transport: Products heavier than 30kg can no longer be sent as a regular parcel and must be transported on a pallet to ensure safety and undamaged delivery.

Collection in Eindhoven

It is possible to collect your order free of charge at our pick-up point in Eindhoven (Ekkersrijt), The Netherlands. This is strictly by appointment only.

Preparation & Assembly

After you have placed your order, our specialists will get to work for you. We prepare the LPG tank in the configuration you ordered, which includes professionally mounting the tank accessories (such as valves and gauges) and testing for leaks.

As this is a precision job requiring expertise, we are not always able to ship the tank or have it ready for collection on the same day the order is placed. We appreciate your understanding.

Safety requirements during refuelling

To refuel safely, the installation must comply with the following strict rules:

• Extraction valve closed: The manual or electric extraction valve on the tank must always be completely closed during refuelling.
• Accessibility: If the valve on the tank is not directly accessible at the filling point, an additional manual shut-off valve or automatic valve must be placed near the filling connection on the vehicle.
• Mandatory safety features: The tank must be equipped with an 80% fill limiter with a non-return valve, a pressure relief valve, and an excess flow valve.
• Tank Certification: The tank must be certified according to ECE 67R.
• Fixed Mounting: The tank must be permanently and solidly attached to the vehicle chassis according to EN 12979.

Always inform yourself about the specific rules of the countries you plan to visit to avoid issues at gas stations or during technical inspections.