Boats with LPG (gas)

This section outlines very briefly what you must think about for the BSS examination if you use gas aboard your boat.

If your vessel has gas aboard, please remember to prepare the vessel before its examination and ensure there is a supply of gas ready for the examiner to undertake the checks.

The BSS Examination includes checks on any LPG system covering aspects of the storage of gas cylinders, gas system and the connections to gas appliances.

The complete set of checks can be read in Chapter 7 of the BSS Essential Guide.

How do we check your boat is free from gas leaks?

The BSS examination includes a test that checks that the gas system is free from leaks i.e the gas tightness-test.

However, we would like to stress that the system should be gas-tight (not leaking) all times, not just when the BSS examination is due.

For boat owners the simplest way of having that assurance is to install a bubble tester and use it routinely. The examiner can also use this device to check the system is gas tight too, if it is installed correctly.

Bubble tester photo Bubble tester diag

Where a bubble tester isn't fitted, the BSS Examiner must use a device called a manometer, this has to be connected to a gas test point.

The test point is simply a threaded opening into the gas system. It is sealed by a screw action nipple. To test the system, the nipple is undone, the manometer is connected up, the test is carried out, the manometer is then disconnected and the nipple is tightened back down.  It is tightened sufficiently to seal the test point once more to prevent a gas leak, but not so tight as to damage the seal and cause a gas leak.

Who can carry out BSS Examinations on your boat?

All BSS examiners are trained and assessed in the same way to carry out checks of the gas system and to be competent undertake gas-tightness tests with manometers or with bubble-testers. They are quality assessed and have to undergo periodic retraining and assessment.

However, the use of a boat, affects its status under UK gas legistation, as follows:-

Privately owned boats used solely for leisure and pleasure purposes

If your boat is used by you for private leisure and pleasure use, all BSS Examiners can legally carry out a full boat safety scheme examination including checking by manometer that the gas system does not leak - the tightness-test.

Please read these other pages if you think your boat is in one of the categories below.

Link to information about - Residential boats, liveaboard craft and houseboats

Link to information about - Hire boats, passenger vessels, commercial and business boats*

The BSS Examiner may ask you about your boat's use:

The examiners who are not on the Gas Safe register are advised as part of their initial dealings with owners to ask in advance of turning up at the mooring, about the status of the craft.

To avoid falling foul of UK law and avoiding criminal prosecution they need to find out whether the boat's use will mean they should not carry out a tightness-test using a manometer.  They may ask the following questions, just for their own personal record:

  • Is the boat hired out in the course of a business?
  • Is the boat used primarily by anyone for domestic or residential purposes (In this matter, it makes no difference to if the boat is owner-occupied or rented-out)?
  • Are people invited on board the boat in the course of a business, e.g. is it a cafĂ© or shop?

Even if the answer to all the questions above is 'no', the examiner is advised to make a brief record that he or she has asked the questions and received the negative answers. This information will not be shared with BSS Office or other parties unless there is an investigation linked to gas testing by the examiner.

*Note on the BSS Examination for non-private boats - If a vessel is a hire boat, third-party managed share-owned boat, trip boat, rented residential boat, floating business or some other form of commercial or public vessel, the boat will be examined to the 2002 BSS Standards.

Further BSS information about the use of LPG on boats

The Safe Use of LPG - pdf leaflet information_90x90.

Avoiding Fire Afloat - pdf leaflet information_90x90

Carbon Monoxide Safety - CO web page information_90x90

Portable gas appliances - news release information_90x90

Refilling gas cylinders - BSS Briefing information_90x90