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Keeping your bulk tank installation safe

Bulk Tank Safety Advice

The below information is essential advice for all bulk LPG gas tanks – both above ground and underground

A safe tank installation keeps you Flo-ing

Ensuring that your bulk LPG gas tank installation stays safe from any risk of ignition, impact or obstruction is paramount for all customers and makes sure that we can keep delivering to you safely.
At Flogas, we ensure all of our tanks continue to meet the requirements laid out by Liquid Gas UK – the LPG industry’s governing body, and we appreciate the help of our customers in making sure they stay safe, so we can keep Flo-ing.

There are various different sizes of bulk LPG gas tanks, so to help you with the sections below the most common sizes are;

450 litres / 0.25 tonnes
1,410 litres / 0.6 tonnes (the most common domestic tank)
2,200 litre / 1 tonnes
3900 litre / 1.75 tonnes
4600 litre tank / 2 tonnes

Larger installations may be made up of a combination of the the above tank sizes.

Your Technical Guide
(Home Bulk Tank Customers)

Download an up-to-date copy f Your Technical Guide to ensure you’re aware of how to care your your installation.

Commercial Customers: Please get in touch with your Account Manager for queries specific to your installation.

Watch our Health and Safety Videos

Our series of videos is designed to help our customers with the essential information they need to ensure that their LPG installations and appliances run smoothly and safely.

At Flogas, safety comes first and we want to make sure all of our customers understand the simple steps to keep flo-ing safely.

If you’re a domestic bulk LPG user, this video will help you on safe ways to add screening – such as fencing around your tank.

This video will give you all of the top tips for looking after your new commercial bulk tank installation.

Keep an eye out for more videos coming soon!

Advice for extreme hot Weather

During extremely hot weather (typically above 32º C) the pressure in an LPG tank can increase to levels that may activate the PRV (Pressure Relief Valve) safety device. This valve is designed to open in order to release excess pressure which may build up in the vessel in such high temperatures.

Any release of gas should be limited and therefore does not create a hazard, provided that the gas installation separation distances have been met.

What to do if your pressure release Valve (PRV) activates and releases gas

If the PRV does activate and releases gas, it’s just doing its job and managing the tank pressure to ensure that it does not rise above safe limits.

1. Please call our 24 hr emergency line on 03457 200 100
2. Ensure that sources of ignition are kept away from the tank area
3. From a safe distance, use a spray attachment on the end of a hose pipe and spray water on to the tank surface – this will help to cool the tank down and reduce pressure
4. When the PRV has stopped venting, wet some towels and place on the tank surface and periodically continue to spray water onto the towels/tank surface. This will help keep the tank cool and prevent pressure building up again
5. Keep away from the PRV itself at all times as it could vent without warning

Advice before undertaking building work

Your LPG installation is carefully sited to ensure that it is safe and compliant with industry codes of practice. Please contact us before undertaking any building work around the LPG vessel, pipework or regulators so that we can discuss and ensure that the works planned do not compromise this and that it remains safe for us to deliver to.

Caring for your tank

Now for the serious bit…

LPG can be a hazardous product if not handled and stored correctly – that’s why we stick very strictly to the codes of practice and guidance from Liquid Gas UK, the industry trade association.

It’s essential that you take good care of your installation. The following DOs and DON’Ts will ensure we can continue delivering your gas safely. Plus, if you don’t look after your tank and surrounding area, you could be faced with a potential liability, you may even be financially liable for any remedial work.


Protect from vehicles

Ensure adequate protection against damage from vehicles for both aboveground and underground tanks

Inform us of any changes

Get in touch with us for guidance if you plan to make any changes to the area of your installation, including access to the tank and installing overhead cables

Keep area clear

Keep a 3 metre radius around the tank clear of weeds, rubbish or combustible materials.

Follow precautions

Follow any safety or security precautions given to you by us, fire prevention officers or local authorities

Remember where your pipes are!

Remember the route of your pipework to avoid any damage from digging

Take care when mowing

Take care when mowing your lawn to not to cause any damage to the tank or inspection hatch.


Modify the installation

Interfere with or modify any part of the installation

Build above or near the installation

Erect any building or structure (permanent or temporary) within 3m of the tank – such as outbuildings, sheds, garages, conservatories, greenhouses, walls or rockeries

Let plants grow near the installation

Allow any deep rooted shrubs, trees or hedges to grow within 3m of the tank

Touch any stickers or signs

Detach, alter, cover up, remove or otherwise interfere with any identification, instructions, warnings, trademarks or any other signs on the installation


Smoke or have any source of ignition within 3m of the tank

Decorate the installation

Paint any part of the installation, as this may affect the amount of heat absorbed by the sun

Build above an underground installation

Construct any hard standing over an underground tank

Park above an underground installation

Park or drive in the area directly above an underground tank.

Decorate the installation

Make changes that will direct surface water towards, or prevent water draining from, the tank area. Surface water drainage should be maintained to ensure water does not build up in the valve chamber. Any costs relating to the failure of the gas supply, the replacement of any water damaged equipment or Flogas not being able to refill the tank whilst the valve chamber is flooded with water will be your responsibility

Keeping your installation tidy

The area surrounding the vessel needs to be kept clear from a source of ignition – including cars and other vehicles, as well as weeds, long grass, foliage, and combustible materials.

We go into further detail below, but these diagrams also show a standard domestic installation for either an underground or above ground LPG tank.

Other tank sizes have different separation distances:

150 to 500 litres = 2.5 metres
500 to 2,400 litres = 3 metres
2,400 to 9,000 litres = 7.5 metres

It’s also important to ensure that the shroud of your underground tank is kept free of debris – such as mud, water or even insect nests to ensure your deliveries keep flo-ing!

Screening your tank

A tank screen can be a useful addition to help your above ground tank installation blend into your environment. Below are some examples of screening options, and their guidance for use.

For all tanks up to 1.1 tonnes (or 2,500 litres) this screening must be at least 1m away from your tank – anything larger must have 6m separation from the tank.

Evergreen Shrubs, Trees or Hedging

One side of the tank/installation only.

Despite being evergreen, these shrubs or trees can still pose a fire risk and must be carefully positioned and maintained to ensure they don’t restrict access and don’t grow nearer than 1m* to the tank(s), or in the area vertically above the tank(s).

Open Block / Ranch Fencing

Up to 3 sides of the tank/installation.

The fourth side must be kept clear for ventilation and delivery access. The open blocks or fencing must obstruct no more than 50% of the natural ventilation.

‘Hit & Miss’ style fencing

Up to 4 sides of the tank/installation.

This fencing must not obstruct more than 50% of the natural ventilation through the screen and there must be at least 2 equivalently ventilated means of exit. Any gates must open outwards, be easily openable from inside and not self-locking.

Closed panel style fencing

Up to 2 sides of the tank/installation.

For any fencing where more than 50% of the natural ventilation is obstructed through the screened part, the remaining sides must be left clear for ventilation and delivery access.

Fire Precautions for your tank

It’s essential to have some level of fire precaution – the below table outlines the recommendation for your tank installation.

Installation capacityInstallation typeWater supply19mm hose reel9kg dry powder extinguisher9 litre water extinguisher
Up to 1.1 tonne
(2,500 litres)
Up to 1.1 tonne
(2,500 litres)
1.1 tonne to 2.5 tonnesVapour/LiquidYES
Underground/Mounded TanksYES

Protecting your installation from vehicle damage

The driving or parking of vehicles near, and for underground installations parking on top of, your LPG tank(s) can pose a significant risk from sources of ignition and impact risk.
The separation distances for parked cars varies dependent on the size of your installation and whether vehicles are under your control or not – for example cars parked in public carparks.

InstallationVehicles under control of site occupierVehicles NOT under the control of site occupier
Up to 0.8 tonnes
(1000 litres)
0.8 to 3.5 tonnes3m3m
3.5 to 12.5 tonnes6m7.5m
Above 12.5 tonnesSeek further advice from FlogasSeek further advice from Flogas

In addition, you should prevent the risk of any impact from vehicles. This may be in the form of bollards or crash barriers, which must be suitable to prevent a vehicle hitting any part of your tank or installation. We advise that you seek the advice of a professional protection supplier. A compound fence on it’s own is not considered to provide suitable protection from vehicle impact.

You must also prevent vehicles from driving or parking on the area above an underground tank, by means of suitable kerbs, bollards or barriers.

Suitable types of Impact Protection

Metal Armco barriers surrounding the tank(s)

Metal Bollards surrounding the tank(s)

Concrete bollards

Armco barriers

Raised Kerbs

Large boulders